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Improved Technical Specification Conversion License Amendment Request, Volume 6, (Revision 1), Section 3.1 - Reactivity Control Systems
	ML081480466
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Site:	Davis Besse
Issue date:	05/16/2008
From:	; FirstEnergy Nuclear Operating Co
To:	; Office of Nuclear Reactor Regulation
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DAVIS-BESSE NUCLEAR POWER STATION UNIT 1 IMPROVED TECHNICAL SPECIFICATION CONVERSION LICENSE AMENDMENT REQUEST VOLUME 6 (Rev. 1)

SECTION 3.1 - REACTIVITY CONTROL SYSTEMS

. I . 'ý 7-, ' - -:ý' , - I ; . " " , . , 1 11 : , . I. I", - , , ,I I

Attachment 1, Volume 6, Rev. 1, Page i of i Summary of Changes ITS Section 3.1 Change Description Affected Pages Previous Insert 1A and JFD 8 have been deleted. Pages 16, 17 and 23..

The definition of SDM in Section 1.0 will not include the allowance to not account for an assumed stuck rod. Therefore, the changes described in the Davis-Besse response to question 200801221206 are no longer necessary.

The changes described in the Davis-Besse Page 16 response to question 200801221315 have been made. Editorial changes to the ITS 3.1.1 Bases have been made.

The changes described in the Davis-Besse Page 21 response to question 200801221334 have been made. A typographical error in the ITS 3.1.1 Bases has been corrected.

The changes described in the Davis-Besse Pages 51 and 53 response to question 200801241318 have been made. A typographical error in the CTS Markup for ITS 3.1.3 has been corrected and an editorial change has been made to DOC M02..

The changes described in the Davis-Besse Pages 52, 56, 57, 63, and 64 response to question 200801241338 have been made. The words changed in the Note to ITS SR 3.1.3.2 have been changed back to the ISTS wording.

The changes described in the Davis-Besse . Page 109 response to question 200801241341 have been made. A typographical error in ITS 3.1.5, DOC M03 has been corrected.

The changes described in the Davis-Besse Page 111 response to question 200801241344 have been made. A typographical error in ITS 3.1.5 DOC L01 has been corrected.

The changes described in the Davis-Besse Page 201 response to question 200712030851 have been made. A typographical error in the CTS Markup for ITS 3.1.9 has been corrected.

The changes described in the Davis-Besse Page 206 response to question 200801280945 have been made. A-editorial change to ITS 3.1.9 DOC L03 has been made.

The changes described in the Davis-Besse Page 236 response to question 200801281544 have been made. A typographical error in CTS 3/4.1.2.1 DOC R01 has been corrected.

Corrected typographical error in the ITS 3.1.8 Page 178 Discussion of Change (wrong Surveillance Requirement (SR) was identified).

Added titles for UFSAR Appendix 3D references in Pages 22, 45, 63, 101,120,138, and 169 the Bases (editorial change for consistency with the resolution to a question on a different section).

Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page i of i

Attachment 1, Volume 6, Rev. 1, Page 1 of 307 ATTACHMENT 1 VOLUME 6 DAVIS-BESSE IMPROVED TECHNICAL SPECIFICATIONS CONVERSION ITS SECTION 3.1 REACTIVITY CONTROL SYSTEMS Revision 1 Attachment 1, Volume 6, Rev. 1, Page 1 of 307

Attachment 1, Volume 6, Rev. 1, Page 2 of 307 LIST OF ATTACHMENTS

1. ITS 3.1.1

2. ITS 3.1.2

3. ITS 3.1.3

4. ITS 3.1.4

5. ITS 3.1.5

6. ITS 3.1.6

7. ITS 3.1.7

8. ITS 3.1.8

9. ITS 3.1.9

10. Relocated/Deleted Current Technical Specifications (CTS)

Attachment 1, Volume 6, Rev. 1, Page 2 of 307

Attachment 1, Volume 6, Rev. 1, Page 3 of 307 ATTACHMENT 1 ITS 3.1.1, SHUTDOWN MARGIN (SDM) 0 Attachment 1, Volume 6, Rev. 1, Page 3 of 307

, Volume 6, Rev. 1, Page 4 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 4 of 307

Attachment 1, Volume 6, Rev. 1, Page 5 of 307 ITS 3.1.1 ITS 3/4.1 REACTIVITY CONTROL SYSTEMS 3/4.1 .1 BORATION CONTROL SHUTDOWN MARGIN LIMTINCODITONFOR LIMITINGONDITIONwithinOPERATION the limits specified in the COLR* -

3.1.1 3.1.1.1 The SHUTDOWN MARGIN shall be> I thin t lA02i APPLICABILITY: MODES , , 3, 4 and 5. A03 A04 ACTION:

rnot within limits] r- within 15 minutes /" N With the SHUTDOWN MARGIN im-m ate initiate an tinu boration ACTION A lat > 25 gpm of 787ffYppm boron or*t equivalent,I until the required SHUTDOWN\ -' L01 MARGIN is restored.

SURVEILLANCE REQUIREMENTS E-within the limits specified in the COLR SR 3.1.1.1 4.1 .1.1.1 The SHUTDOWN MARGIN shall be determined to bel

a. Within one hour after detection of an inoperable control r d(s) and at least o c per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod(s) is inoperable 1111 the inoperable control rod

[See ITS 3.1.4 is immovable or untrippable, the above required SHUTDOWN' MARGIN shall be See increased by an amount at least equal to the withdrawn worth of the immovable or ITS 1.0 untrippable control rod(s). F

b. When in MODES I or 2# , at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , by verifying that regulating rod groups withdrawal is within the limits of Specification 3.1.3.6.

see c.

When in MODE 2## within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months prior to achieving reactor criticality by ITS 3.2.1 verifying that the predicted critical control rod position is within the limits of Specification 3.1.3.6.

d. Prior loadingto by initial o operatioonofove the 5% RATED factors ofet. THERMAL below, with the POWERregul, aftea*ch ig rod gop fuel at the maximu insertion limit of Specification 3.1.3.6.//

____________________A02 I'See Special Texception 3110.4 I"bee LM T 7.9, St..a-ri eralor Level, for additional SHUT . W GIN requirements. A

' With kerr> 1.01G

"*With k-< 1.01tSee ITS 3.2.1 J DAVIS-BESSE, UNIT 1 3/4 1-1 Amendment No.4-94 r- 9 2-, 276 Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 5 of 307

Attachment 1, Volume 6, Rev. 1, Page 6 of 307 ITS 3.1.1 ITS REACTIVITY CONTROL*SYSTEMS SURVEILLANCE REQUIREMIENTS (Continued). .

SR 3.1.1.1 e. When in MODES 3, 4 or 5, at least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by-

1. *actor cool nt system *ron concen ation, cons~ide/r/

2. /Ointrol ton ro of position, th followi~ng actors: / *

3. , Reactor c9 !ant syste / averageo In' temperature. LA02

/4./Fuel bur up,based o /gross the' I energy 9eain,

,Xenon c ncentratto* and /

6:% Samar*J concentr iton.

4.1.1.1.2 The overall core reactivity balance shall be compared to predicted values to demonstrate a rement within + 1% Ak/k at least once per 31 Effective Full Power Days (EFPD). This comparison shall consider See at least those factors stated in Specification 4A1.1.L..e, above. ITS 3 .I.2~)

The predicted reactivity values shall be adjusted (normalized) to correspond to: the actual core conditions prior to exceeding a fuel burnup of 60 Effective Full Power Days after each fuel loading.

DAVIS-BESSE, UNIT I 3/4 1-2 Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 6 of 307

Attachment 1, Volume 6, Rev. 1, Page 7 of 307 DISCUSSION OF CHANGES ITS 3.1.1, SHUTDOWN MARGIN (SDM)

ADMINISTRATIVE CHANGES A01 In the conversion of the Davis-Besse Current Technical Specifications (CTS) to the plant specific Improved Technical Specifications (ITS), certain changes (wording preferences, editorial changes, reformatting, revised numbering, etc.) are made to obtain consistency with NUREG-1430, Rev. 3.1, "Standard Technical Specifications-Babcock and Wilcox Plants" (ISTS).

These changes are designated as administrative changes and are acceptable because they do not result in technical changes to the CTS.

A02 The Applicability of CTS 3.1.1.1 is MODES 1, 2, 3, 4, and 5, and includes a footnote (*) to the MODE 2 Applicability stating, "See Special Test Exception 3.10.4." ITS 3.1.1 does not contain this footnote, or a reference to Special Test Exception 3.10.4. This changes the CTS by deleting the reference footnote.

The purpose of the footnote references is to alert the user that a Special Test Exception exists that may modify the Applicability of the Specification. It is an ITS convention to not include these types of footnotes or cross-references. This change is designated as administrative as it incorporates an ITS convention with no technical change to the CTS.

A03 The Applicability of CTS 3.1.1.1 is MODES 1, 2, 3, 4, and 5, and includes a footnote (**) to the MODE 3 Applicability stating, "See LCO 3.7.9, Steam Generator Level, for additional SHUTDOWN MARGIN requirements." CTS 3.7.9 establishes maximum steam generator level requirements in MODE 3 that, in conjunction with adjusted SDM requirements specified in operating procedures, provide adequate SDM to ensure the reactor will remain subcritical during a MODE 3 Main Steam Line Break. ITS 3.1.1 does not contain this footnote, or a reference to CTS 3.7.9. This changes the CTS by deleting the reference footnote.

The purpose of the footnote reference is to alert the user that additional SDM requirements exist that may affect satisfying the requirements of the Specification. It is an ITS convention to not include these types of footnotes or cross-references. This change is considered administrative because the technical requirements have not changed.

A04 CTS 3.1.1.1 provides SDM requirements in MODES 1, 2, 3, 4 and 5.

CTS 4.1.1.1.1.b states that when in MODE 1 or 2 with keff ->1.0, SDM is determined by verifying that the regulating rod groups withdrawal is within the limits of CTS 3.1.3.6, Regulating Rod Insertion Limits. ITS 3.1.1 is Applicable in MODES 3, 4, and 5. ITS 3.2.1, "Regulating Rod Insertion Limits," contains the regulating rod insertion limits in MODES 1 and 2. CTS 4.1.1.1.2 requires the core reactivity balance to be compared to the predicted values at least once every 31 EFPD. ITS 3.1.2, "Reactivity Balance," contains the reactivity balance limits in MODES 1 and 2. This changes the CTS by placing the SDM requirements applicable in MODES 3, 4 and 5 in ITS 3.1.1, and placing the SDM requirements applicable in MODES 1 and 2 in ITS 3.1.2 and ITS 3.2.1.

Davis-Besse Page 1 of 5 Attachment 1, Volume 6, Rev. 1, Page 7 of 307

Attachment 1, Volume 6, Rev. 1, Page 8 of 307 DISCUSSION OF CHANGES ITS 3.1.1, SHUTDOWN MARGIN (SDM)

The purpose of CTS 3.1.1.1 is to ensure that the SDM assumed in the accident analyses is available. When the reactor is critical, SDM is verified by ensuring that the regulating rods are above the regulating rod insertion limits and that the reactivity balance is within limits. The ITS 3.1.1 Applicability Bases states that in MODES 1 and 2, SDM is ensured by complying with LCO 3.1.5 and LCO 3.2.1.

This change is acceptable because the SDM requirements have not changed.

Even though CTS 3.1.1.1 is applicable in MODES 1 and 2, the CTS Surveillances state that adequate SDM is determined by meeting the regulating rod insertion limits and reactivity balance limits. The ITS also verifies SDM in MODES 1 and 2 by requiring compliance with the regulating rod insertion limits and reactivity balance limits. Changes to the reactivity balance limits requirements will be discussed in Discussion of Changes for ITS 3.1.2 and changes to the regulating rod insertion limit requirements will be discussed in Discussion of Changes for ITS 3.2.1. This change is considered administrative because the technical requirements have not changed.

MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES LA01 (Type 5 - Removal of Cycle-Specific ParameterLimits from the Technical Specifications to the Core OperatingLimits Report) CTS 3.1.1.1 states that the SDM shall be >_1.0% Ak/k. The specific value of 1.0% Ak/k also appears in the CTS 3.1.1.1 Actions and Surveillance Requirements. ITS 3.1.1 states that SDM shall be within the limits provided in the Core Operating Limits Report (COLR).

The Actions and Surveillance Requirements of ITS 3.1.1 also reference SDM values located in the COLR. This changes the CTS by relocating the SDM limit, which must be confirmed on a cycle-specific basis, to the COLR.

The removal of these cycle-specific parameter limits from the Technical Specifications to the COLR is acceptable because the cycle-specific limits are developed or utilized under NRC-approved methodologies which will ensure that the Safety Limits are met. The NRC documented in Generic Letter 88-16, "Removal of Cycle-Specific Parameter Limits From Technical Specifications,"

that this type of information is not necessary to be included in the Technical Specifications to provide adequate protection of public health and safety. The ITS still retains the SDM requirement. The methodologies used to develop the parameters in the COLR have obtained prior approval by the NRC in accordance with Generic Letter 88-16. Also, this change is acceptable because the removed information will be adequately controlled in the COLR under the requirements provided in ITS 5.6.3, "CORE OPERATING LIMITS REPORT." ITS 5.6.3 ensures that the applicable limits (e.g., fuel thermal mechanical limits, core Davis-Besse Page 2 of 5 Attachment 1, Volume 6, Rev. 1, Page 8 of 307

Attachment 1, Volume 6, Rev. 1, Page 9 of 307 DISCUSSION OF CHANGES ITS 3.1.1, SHUTDOWN MARGIN (SDM) thermal hydraulic limits, Emergency Core Cooling Systems limits, and nuclear limits such as SDM, transient analysis limits, and accident analysis limits) of the safety analyses are met. This change is designated as a less restrictive removal of detail change because information relating to cycle-specific parameter limits is being removed from the Technical Specifications.

LA02 (Type 3 - Removing ProceduralDetails for Meeting TS Requirements or Reporting Requirements) CTS 4.1.1.1.1.e requires determination that SDM is within limit by consideration of the following factors: reactor coolant system boron concentration, control rod position, reactor coolant system average temperature, fuel burnup based on gross thermal energy generation, xenon concentration, and samarium concentration. ITS SR 3.1.1.1 requires a determination that SDM is within limit but does not describe the factors that must be considered in the calculation. This changes the CTS by removing details of how to perform the SDM verification to the Bases.

The removal of these details for performing a Surveillance Requirement from the Technical Specifications is acceptable because this type of information is not necessary to be included in the Technical Specifications to provide adequate protection of public health and safety. The ITS still retains the requirement to verify SDM is within the limit. Also, this change is acceptable because these types of procedural details will be adequately controlled in the ITS Bases.

Changes to the Bases are controlled by the Technical Specification Bases Control Program in Chapter 5. This program provides for the evaluation of changes to ensure the Bases are properly controlled. This change is designated as a less restrictive removal of detail change because procedural details for meeting Technical Specification requirements are being removed from the Technical Specifications.

LESS RESTRICTIVE CHANGES L01 (Category3- Relaxation of Completion Time) CTS 3.1.1.1 Action states that when the SDM is less than the applicable limit, boration must be initiated immediately. Under the same conditions in the ITS, ITS 3.1.1 Required Action A.1 states that boration must be initiated within 15 minutes. This changes the CTS by relaxing the Completion Time from "immediately" to 15 minutes.

The purpose of the CTS 3.1.1.1 Action is to restore the SDM to within its limit promptly. This change is acceptable because the Completion Time is consistent with safe operation under the specified Condition, considering the operability status of the redundant systems of required features, the capacity and capability of remaining features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the allowed Completion Time. The ITS Completion Time of 15 minutes is adequate for an operator to correctly align and start the required systems and components. In addition, the ITS Bases for the ACTION state that boration must be initiated promptly. This change is designated as less restrictive because additional time is allowed to restore parameters to within the LCO limits than was allowed in the CTS.

Davis-Besse Page 3 of 5 Attachment 1, Volume 6, Rev. 1, Page 9 of 307

Attachment 1, Volume 6, Rev. 1, Page 10 of 307 DISCUSSION OF CHANGES ITS 3.1.1, SHUTDOWN MARGIN (SDM)

L02 (Category 4 - Relaxation of Required Action) CTS 3.1.1.1 Action states that when the SDM is not within the applicable limits, boration must be initiated and continued at Ž_25 gpm of 7875 ppm boron or its equivalent until the required SDM is restored. ITS 3.1.1 Required Action A.1 states that with SDM not within limits, initiate boration to restore SDM to within limits. This changes the CTS by eliminating the specific values of flow rate and boron concentration that must be used to restore compliance with the LCO.

The purpose of the CTS 3.1.1.1 Action is to restore the SDM to within its limits.

This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the operability status of the redundant systems of required features, the capacity and capability of remaining features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the repair period. Removing the specific values of flow rate and boron concentration from the CTS Action provides flexibility in the restoration of the SDM and eliminates conflicts between the SDM value and the specific boration values in the CTS Action. As stated in the ITS 3.1.1 Bases for ACTION A, "In the determination of the required combination of boration flow rate and boron concentration, there is no unique requirement that must be satisfied. Since it is imperative to raise the boron concentration of the RCS as soon as possible, the boron concentration should be a highly concentrated solution, such as that normally found in the boric acid addition tank or the borated water storage tank. The operator should borate with the best source available for the plant conditions." Specifying a minimum flow rate and concentration in the ACTION may not accomplish the objective of raising the RCS boron concentration as soon as possible. This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

L03 (Category5- Deletion of Surveillance Requirement) CTS 4.1.1.1.1 .d requires verification that SDM is within its limit, "Prior to initial operation above 5% RATED THERMAL POWER after each fuel loading, by consideration of the factors of e.

below, with the regulating rod groups at the maximum insertion limit of Specification 3.1.3.6." The ITS does not contain a similar requirement. This changes the CTS by deleting the CTS Surveillance Requirement to verify that SDM is within its limit, "Prior to initial operation above 5% RATED THERMAL POWER after each fuel loading, by consideration of the factors of e below, with the regulating rod groups at the maximum insertion limit of Specification 3.1.3.6."

The purpose of CTS Surveillance 4.1.1.1.1 .d is to verify the core design predictions by determining the SDM with the regulating rod groups at the insertion limits. This change is acceptable because the deleted Surveillance Requirement is not necessary to verify that the parameter used to meet the LCO is within limit. SDM is periodically verified in MODES 3, 4, and 5 by ITS SR 3.1.1.1 and in MODES 1 and 2 by ITS SR 3.2.1.1, SR 3.2.1.2, and SR 3.2.1.3. Thus, the parameter continues to be tested in a manner and at a frequency necessary to give confidence that the parameter is within limit. The core design predictions, such as rod worth, boron worth, and critical boron Davis-Besse Page 4 of 5 Attachment 1, Volume 6, Rev. 1, Page 10 of 307

Attachment 1, Volume 6, Rev. 1, Page 11 of 307 DISCUSSION OF CHANGES ITS 3.1.1, SHUTDOWN MARGIN (SDM) concentration, are verified during the startup physics test program. No changes to the predicted worths of RCS boron, rod worths, or fuel worths (which include transient poison worths) are required when the measurements meet acceptance criteria. In this way, physics testing assures that the design core SHUTDOWN MARGIN is maintained. Therefore, the core design parameters upon which SDM relies are verified before exceeding 5% RATED THERMAL POWER (RTP) after each refueling outage. This change is designated as less restrictive because less stringent Surveillance Requirements are being applied in the ITS than were applied in the CTS.

Davis-Besse Page 5 of 5 Attachment 1, Volume 6, Rev. 1, Page 11 of 307

Attachment 1, Volume 6, Rev. 1, Page 12 of 307 Improved Standard Technical Specifications (ISTS) Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 12 of 307

Attachment 1, Volume 6, Rev. 1, Page 13 of 307 SDM 3.1.1

'- 3.1 REACTIVITY CONTROL SYSTEMS 3.1:1 SHUTDOWN MARGIN (SDM) 3.1.1.1 LCO 3.1.1 The SDM Shall be within the limits specified in the COLR.

APPLICABILITY: MODES 3, 4, and 5.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME 3.1.1.1 A. SDM not within limits. A.1 Initiate boration to restore. 15 minutes Action SDM to within, limits.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY 4.1.1.1 .e SR 3.1.1.1 Verify SDM is within the limits specified in'the 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , COLR.

BWVOG STS 31.1-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 13 of 307

Attachment 1, Volume 6, Rev. 1, Page 14 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.1, SHUTDOWN MARGIN (SDM)

None Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 14 of 307

Attachment 1, Volume 6, Rev. 1, Page 15 of 307 Improved Standard Technical Specifications (ISTS) Bases Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 15 of 307

Attachment 1, Volume 6, Rev. 1, Page 16 of 307 SDM B 3.1.1 B 3.1 REACTIVITY CONTROL SYSTEMS B13.1. SHUTDOWN MARGIN (SDM)

BASES BACKGROUND The reactivit control systems Fust be redundant and c'pable of holding,---

INSERT 1 the reactor re subcritical wien shut own un GDC 26 (R f. 1 . SDM requirements provide sufficient reactivity margin to ensure that acceptable fuel design limits will not be exceeded for normal shutdown and anticipated operational occurrences (AOOs). rJ IMODE and 5,,e SDM defines the degree of subcriticality that would be obtained immediately following the insertion of all safety and regulating rods, assuming the single CONTROL ROD assembly of highest reactivity worth is fully withdrawn.

The system design requires that two independent reactivity control systems be provided, and that one of these systems be capable of maintaining the core subcritical under cold conditions. These requirements are provided by the use of movable control assemblies and soluble boric acid in the Reactor Coolant System (RCS). The CONTROL RODS can compensate for the reactivity effects of the fuel and water temperature changes accompanying power level changes over the range from full load to no load. In addition, the CONTROL RODS, together with and Purification the Chemical Additionrand MakeuplSystem, provide SDM during power

operation-* are capable of making the core subcritical rapidly enough I.. /o prevent exceeding acceptable fuel damage limits, assuming that the The cONTROL rod of highest reactivity worth remains fully withdrawn.'-R' INSERT 2 RODS* SytmdPrification The Chemical Addition and Makeup System can compensate for fuel 0 depletion, during operation and all xenon burnout reactivity changes, and maintain the reactor subcritical under cold conditions.

During Jpo)&erdpera Fion, SDM control is ensured by operating with the safety rods fully withdrawn (LCO 3.1.5, "Safety Rod Insertion Limits") and the regulating rods within the limits of LCO 3.2.1, "Regulating Rod Insertion Limits." When the unit is in the shutdown and refueling modes, the SDM requirements are met by means of adjustments to the RCS boron concentratior . Adjusted.SDM Iynits defined in the OLR preclude recriticality in e event of a main stem line break (MSL:)in MODE 3, 4,

[*or 5 when h*- h steam agenerator level1s exist./

and by maintaining the steam generator levels within the maximum level limits of LCO 3.7.18, "Steam Generator Level."

BVOG !STS. B 3. 1A -1 ReV. 3:0. ,03/31104.

Attachment 1, Volume 6, Rev. 1, Page 16 of 307

Attachment 1, Volume 6, Rev. 1, Page 17 of 307 1*~ 3.1.1' Q INSERT I Two independent reactivity control systems of different design principles are provided. The Control Rod Drive System utilizes control rods and is capable of reliably controlling the rate of reactivity changes and ensures that, under conditions of normal operation, including anticipated operational occurrences, and with appropriate margin for malfunctions such as stuck rods, specified fuel design limits are not exceeded. The Makeup and Purification System is capable of controlling the rate of reactivity changes resulting from planned normal power changes (including xenon burnout) to ensure that acceptable fuel design limits are not exceeded. The Makeup and Purification System has the ability to initiate and maintain the cold shutdown condition in the reactor (Ref. 1).

I Q INSERT 2 The Chemical Addition System and Makeup and Purification System maintain the SDM as the temperature of the reactor coolant is decreased. The Chemical Addition System and Makeup and Purification System are not Technical Specification required systems, but are' utilized to support the SDM requirements in MODES 3, 4, and 5.

Insert Page B 3.1.1-1 Attachment 1, Volume 6, Rev. 1, Page 17 of 307

Attachment 1, Volume 6, Rev. 1, Page 18 of 307 SDM B3.1 .1 BASES APPLICABLE. The minimum required SDM is assumed as an initial condition in safety the SAFETY analysis. The safety analysis (Ref. 2) establishes anSDM that ensures ANALYSES specified acceptable fuel design limits are not exceeded for normal operation.and AOOs, with assumption of the highest worth rod stuck. out following a reactor trip.

The acceptance criteria for SDM requirements are that specified acceptable fuel design limits are maintained. The SDM requirements must ensure that:

a. The: reactor can be made subcritical fromzall operating conditions, tra nsie nts, a nd De sig n Basis E ve nts ,, - _.. .

.b. The reactivity transients associated.with postulated accident conditions are controllable with acceptable limits (departure from nucleate boiling ratio (DN BR), fuel centerline temperature limits for AOOs, and __280 cal/gm energy deposition for the rod.ejection accident)pand

c. The reactor will be maintained sufficiently subcritical to preclude inadvertent criticality in the shutdown condition.

The most limiting accident for the SDM requirements is based on 5N a main steam line break MSL as described in the accident analysis (Ref":2). rum In addition to the limiting MSLB transient, the SDM requirement must also protect against:

a. Inadvertent boron dilution% j (

b. An uncontrolled rod withdrawal from a subcritical or low power conditiono.--

c. Startup of an inactive reactor coolant pumpl- (I

d. Rod ejection and when

e. Return to criticality if an MSLB occurs duri steam generator level Foperations D3, 4, or 53D is within the limits of LCO 3.7.18 when in MODE 3 BWOG STS, B 3.1.1-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 18 of 307

Attachment 1, Volume 6, Rev. 1, Page 19 of 307 SDM B 3.1.1 BASES APPLICABLE SAFETYANALYS ES (continued).

The basis for thý shutdown requirern nt when high stea generator levels exist is te heat removal pote tial in the seconda system fluid and the negati e reactivity added vi MTC. At any give initial primary system tempe ature.and its. associa ed secondary syst m pressure, the secondary sy tem liquid levels can e equated to a fin I primary, system 0

temperature ssuming the entire temperature ss is boiled. The esulting RCS ietermines the requir d SDM.

SDM satisfies Criterion2 of 10 CFR 50.36(c)(2)(ii).

LCO Shutdown-boron concentration requirements assume the highest worth rod is stuck in the fully withdrawn position to account for a postulated inoperable-or untrippable rod prior to reactor shutdown.

SDM is a core design condition that can be ensured through CONTROL gating) ROD positioningj boron concentration.

roand shutdown groups) and through the soluble 0 The MSLB (R.ef. 2).accident is the most limiting analysis that establishes:

the SDM value of the LCO.

For MSLB accidents, if the LCO is violated, there is a potential to exceed the DNBR limit and to exceed 10 CFR 100 limits (Ref. 3).

the maximum

-- To compensate for the potential

-- Jacciden'steam generator removal heat leveý associated exist -duringwith an MSLB sece.odarysystemI t

is controlled by LCO 3.7.18. chemistry control. nd steam generator leaning, the initial DM in the Maintaining the steam - core must be. justed. The Figure iy the COLR represe s a series of/

generator level within the limits of LCO 3.7.18 will initial conditLi s that ensure the core will remain subcritical following an MSLB accident from thase-o6nditionsl APPLICABIL.ITY In MODES 3, 4, and 5, the SDM requirements are applicable to provide s.ufficient negative reactivity to meet the assumptions of the. safety anal sis discussed above. The Fig re in the COLR is .us".to definethe SDM when hig steam generator vels exist during seco/ndarysystemr chemistry co rol and steam gen 7rator cleaning in MODFES 3, 4, and 5./

0 In MODES 1 and'2, SDM is ensured by complying with LCO 3.1.5 and LCO 3.2.1. .n MODE 6, the shutdown reactivity requirementsare given in LCO 3.9.1, "Boron Concentration."

0 BWOG STS B 3.1.1-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 19 of 307

Attachment 1, Volume 6, Rev. 1, Page 20 of 307 B 3.1.1 O INSERT 3 An MSLB with increased inventory in the steam generators results in rapid overcooling of the RCS, thereby adding positive reactivity to the reactor. The LCO 3.7.18 limits ensure adequate margin is present to prevent the reactor from attaining criticality during any postulated MSLB.

Insert Page B 3.1.1-3 Attachment 1, Volume 6, Rev. 1, Page 20 of 307

Attachment 1, Volume 6, Rev. 1, Page 21 of 307 SDM B 3.1.1 BASES.

ACTIONS A.1 If the SDM requirements are not met, boration must be initiated promptly.

A Completion Time ofl 5: minutes is adequate for~an operator to correctly align and start'the required systems and components. It is assumed that boration SDM is will elb bethe continued, until the SDM requirements are: met. If the limit is not met due to high stamgeeatr e lim it for the .stg/am~generator leV Iland RCS/

'temperat e s ecified in the:CL RCS boration must be continued until the I in/he GOI..* is met SDM for an RCS average temperature of < 280°F is achieved P In the determination of the required combination of boration flow rate and boron concentration, there is no unique requirement that must be satisfied. Since it is imperativeto raise the boron concentration.of the RCSaassolon as possible, the boron concentration should be a highly

ý concentrated .solution, such as that normally found in the boric acid.

fto etan or the borated water storage tank. The operator should borate with the. best sour~ce available for the plant conditions..0 In determinino. the boration flow rate.,/the, time in core life rrust be considered./or instance, the most ifficult time in core if to increase the RCS bton concentration is at t e beginning of cycle, hen the boron concentrati n may approach or',ex eed 2000 ppm. Assu ing that a value of [1]% .Ak/ must be recoveredan a boration flow ratei [] gpm, it is possible t increase the boron co'centration of the RCS by 100 ppm in approxim tely 35 minutes. If ab ron worth of 10 pcm/p m is assumed, this com ination of parameters ill increase the SDM .b [1]%..Ak/k.

These ration parameters of [ gpm and [ ] ppm re resent typical values /nd areo rovided for theeurpose of offering a s ecific exam.leI:

SURVEILLANCE SR 3.1.1.1 REQUIREMENTS The SDM is~verified by performing a reactivity balance calculation.,

l considering the listed. reactivity: effects: 'ji' btnot limited toI, a.. RCS boron concentrationl__ 0 CONTROL ROD b. IReg position

c. RCS average temperaturel_ 0

d. Fuelburnup~based on gross thermal energy generation {a(

e. Xenon concentrationl 4 yJ 0 BVW0G STS B 3.i.1-4 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 21 of 307

Attachment 1, Volume 6, Rev. 1, Page 22 of 307 SDM B 3.1 .1 BASES SURVEILLANCE REQUIREMENTS (continued)

f. Samarium concentrationr and 0

g. Isothermal temperature coefficient (ITC).

Using the ITC accounts for Dopplerreactivity in this calculation because

ýthe reactor is subcritical, and the fuel temperature will be changing at the same rate'as the RCS.

The Frequency of 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is based on the generally slow change .in required boron concentration, and also allows sufficient time for.the operator to collect the required data, which includes performing a boron concentration analysis, and complete.the calculation.

REFERENCES 1. [1.0 OfR 50, 1_. 0endiA, R50,A A,",(*Uu Appendi~x, ... 2 2

zC 1 UFSAR, Appendix 3D.1.22, Criterion 26- Reactivity Control System Redundancy and Capability 0

2. FSAR,Iý §ýtr Ni1.1 Section 15 C

3. 10 CFR 100, "Reactor Site Criteria."

BWOG STS B 3.1.1-5 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 22 of 307

Attachment 1, Volume 6, Rev. 1, Page 23 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.1 BASES, SHUTDOWN MARGIN (SDM)

1. Davis-Besse was designed and under construction prior to the promulgation of 10 CFR 50, Appendix A; The design of Davis-Besse meets the intent of 10 CFR 50, Appendix A published in the Federal Register on February 20, 1971', and as amended in Federal Register on July 7, 1971. Bases references to the 10 CFR 50, Appendix A criteria have been replaced with references to the appropriate section of the UFSAR.

2. Changes are made (additions, deletions, and/or changes) to the ISTS Bases which reflect the plant specific nomenclature, number, reference, system description, analysis, or licensing basis description.

3. These punctuation corrections have been made consistent with the Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 5.1.3.

4. The brackets have been removed and the proper plant specific information/value has been provided.

5. Editorial changes made with no change in intent.

6. Typographical/grammatical correction has been made.

7. Reference to a specific volumetric flow rate, a specific boron concentration, and a specific differential boron worth in deriving an example for approximate boration duration is inappropriate. All of these factors are a function of system operating characteristics, limitations, time in core life or available boration source. The more appropriate method is to establish boration from an appropriate source and to maximize the injection to the extent possible with consideration for reactor coolant system inventory and makeup and letdown system capacities. Further, this boration is required to continue until the boron concentration is verified to be sufficient to achieve the required shutdown margin.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 23 of 307

Attachment 1, Volume 6, Rev. 1, Page 24 of 307 Specific No Significant Hazards Considerations (NSHCs) 0 Attachment 1, Volume 6, Rev. 1, Page 24 of 307

Attachment 1, Volume 6, Rev. 1, Page 25 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS ITS 3.1.1, SHUTDOWN MARGIN (SDM)

There are no specific NSHC discussions for this Specification.

0 Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 25 of 307

, Volume 6, Rev. 1, Page 26 of 307 ATTACHMENT 2 ITS 3.1.2, REACTIVITY BALANCE , Volume 6, Rev. 1, Page 26 of 307

, Volume 6, Rev. 1, Page 27 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs) , Volume 6, Rev. 1, Page 27 of 307

Attachment 1, Volume 6, Rev. 1, Page 28 of 307 ITS 3.1.2 ITS 3/4.1 REACTIVITY CONTROL SYSTEMS 3/4.1.1 BORATION CONTROL SHUTDOWN MARGIN A02 LIMITING CONDITION FOR OPERATION proposedi ILCOA31. 9t A*-*-dd See "

3.1A1.1 The SHUTDOWN MARGINshall be> 1% Ak/kAdpos LCO 3ITS 3.1.1 and/

3.1.2 -- _ _ _ __ TS 3.2.1 J APPLICABILITY:, MODES 1, 2, 37,4 ACTION:

See ITS 3.1. 1, With the SHUTDOWN MARGIN < 1% Ak/k, immediately initiate and continue boration ITS 3.1.8, at > 25 gpm of 7875 ppm boron or its equivalent, until the required SHUTDOWN ITS 3.1.9, MARGIN is restored. and ITS 3.2.1 SURVEILLANCE REQUIREMENTS

[ITS 321 and 14.1.1.1.1 The SHUTDOWN MARGIN shall be determined to be > 1% Ak/k:

See

a. Within one hour after detection of an inoperable control rod(s) and at least once I See31.4 per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod(s) is inoperable IIf the inoperable control rod] [ T .

is immovable or untrippable, the above required SHUTDOWN MARGIN shall be *---* r "

increased by an amount at least equal to the withdrawn worth of the immoal orJ

See.

u ntrippable contr Iol .rod(s).I vbeo ý ý T .

b. When in MODES I or 20, at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , by verifying that regulating rod groups withdrawal is within the limits of Specification 3.1.3.6.

See

c. When in MODE 20 within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months prior to achieving reactor criticality by ITS 3.2.11 verifying that the predicted critical control rod position is within the limits of Specification 3.1.3.6.

d. Prior to initial operation above 5% RATED THERMAL POWER after each fuel See loading by consideration of the factors-of e. below, with the regulating rod groups ITS 3.1.1I nt the mayim,,nm invprfinn limib nfnpifcntfien,, I I IX 4 "* Add proposedACTýIONS A andýB J-

--- *---*- ITS 3.1e.1 andl ITS 3.2.1 I*See Snecial Test Exceibn 3.10,i 1"See LCO 3.7.9, Steam Generator Level for additional SHUJTDOWN MARGIN rt See

With kff-> 1.0

'Withkff- 1.0

[ITS 3.1.1 See ITS 3.2.1

]

DAVIS-BESSE, UNIT l 3/4 1-1 Amendment No. -194- +92-, 276 Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 28 of 307

Attachment 1, Volume 6, Rev. 1, Page 29 of 307 ITS 3.1.2 ITS REACTIVITY CONTROL SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

e. When in MODES 3, 4 or 5, at least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by consideration of the following factors:

1. Reactor coolant system boron concentration,

2. Control rod position, See

3. Reactor coolant system average temperature. ITS 3.1.1

4. Fuel burnupobased on gross thermal energy generation,

5. Xenon concentration, and

6. Samarium.concentration.

[ Prior to entering MODE 1 after each fuel loading and M01 SR 3.1.2.1 rJ 4.1.1.1.2 The overall core reactivity balance shall be compared to predicted values to demonstrate agreement within + 1% ak/k at least once per 31 Effective Full Power Days (EFPD*n lat Teas os fa"*rs4U K 1t e~fc von 4 .1.

Th* cam ts sha

ý..esa boyý co der LA..

L iFe predlCieo rea;T.1v1ZyY Oues Snall De a0juSTeg %normalizeUI to correspond to the actual core conditions prior to exceeding a fuel burnup of 60 Effective Full Power Days after each fuel loading.

/

-4 NOTE Only required after 60 tr-ru:.

\

L03 OAVIS-BESSE, UNIT I 3/4 1-2 Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 29 of 307

Attachment 1, Volume 6, Rev. 1, Page 30 of 307 DISCUSSION OF CHANGES ITS 3.1.2, REACTIVITY BALANCE ADMINISTRATIVE CHANGES A01 In the conversion of the Davis-Besse Current Technical Specifications (CTS) to the plant specific Improved Technical Specifications (ITS), certain changes (wording preferences, editorial changes, reformatting, revised numbering, etc.) are made to obtain consistency with NUREG-1430, Rev. 3.1, "Standard Technical Specifications-Babcockand Wilcox Plants" (ISTS).

These changes are designated as administrative changes and are acceptable because they do not result in technical changes to the CTS.

A02 CTS 4.1.1.1.2 requires the overall core reactivity balance be compared to predicted values to demonstrate agreement within +/- 1% Ak/k. However, this Surveillance is currently part of the SHUTDOWN MARGIN Specification. A new LCO, ITS LCO 3.1.2, requires the measured core reactivity balance to be within

+/- 1% Ak/k of predicted values. This changes the CTS by having a separate Specification for the core reactivity balance requirement.

This change is acceptable because the requirements have not changed.

Converting the requirement from a Surveillance in the SHUTDOWN MARGIN Specification to an LCO is consistent with the ITS format and content guidance.

Any technical changes resulting from this are discussed in other Discussion of Changes (DOCs). This change is considered administrative because the technical requirements have not changed.

MORE RESTRICTIVE CHANGES M01 ITS SR 3.1.2.1 requires the core reactivity balance to be determined to be within

+/- 1% Ak/k of the predicted value prior to entering MODE 1 after each refueling.

The CTS does not contain a requirement to perform a core reactivity balance prior to entering MODE 1 after each refueling. This changes the CTS by adding an additional performance requirement for the core reactivity balance SR.

This change is acceptable because it requires a test that demonstrates agreement between the core design and the core design predictions prior to raising core power above 5% RATED THERMAL POWER (RTP) after each refueling. This verification, which is currently performed as part of the startup physics testing program, provides additional confidence that the core design is acceptable for operation at full power. This change is designated as more restrictive because it adds a Surveillance Requirement which does not appear in the CTS.

RELOCATED SPECIFICATIONS None Davis-Besse Page 1 of 4 Attachment 1, Volume 6, Rev. 1, Page 30 of 307

Attachment 1, Volume 6, Rev. 1, Page 31 of 307 DISCUSSION OF CHANGES ITS 3.1.2, REACTIVITY BALANCE REMOVED DETAIL CHANGES LA01 (Type 3 - Removing ProceduralDetails for Meeting TS Requirements or Reporting Requirements) CTS 4.1.1.1.2 requires comparison of the actual and predicted core reactivity balance, and specifically requires consideration of at least those factors stated in Specification 4.1.1.1.1 .e. CTS 4.1.1.1.1 .e requires determination of SDM and requires the consideration of the following factors:

reactor coolant system boron concentration, control rod position, reactor coolant system average temperature, fuel burnup based on gross thermal energy generation, xenon concentration, and samarium concentration. ITS SR 3.1.2.1 requires comparison of the actual and predicted core reactivity balance, but does not describe the factors that must be considered in the calculation. This information is relocated to the Bases. This changes the CTS by removing details on how the core reactivity balance comparison calculation is performed from the CTS and placing the information in the Bases.

The removal of these details for performing a Surveillance Requirement from the Technical Specifications is acceptable because this type of information is not necessary to be included in the Technical Specifications to provide adequate protection of public health and safety. The ITS still retains the requirement to verify measured core reactivity balance is within +/- 1 % Ak/k of predicted values.

Also, this change is acceptable because these types of procedural details will be adequately controlled in the ITS Bases. Changes to the Bases are controlled by the Technical Specification Bases Control Program in Chapter 5. This program provides for the evaluation of changes to ensure the Bases are properly controlled. This change is designated as a less restrictive removal of detail change because procedural details for meeting Technical Specification requirements are being removed from the Technical Specifications.

LESS RESTRICTIVE CHANGES L01 (Category 2- Relaxation of Applicability) CTS 3.1.1.1 is applicable in MODES 1, 2, 3, 4, and 5. ITS 3.1.2 is applicable in MODES 1 and 2. This changes the CTS by reducing the applicable MODES in which the core reactivity balance requirement must be met.

The purpose of CTS Surveillance 4.1.1.1.2 is to verify the core design by comparing the actual and predicted core reactivity balance. This change is acceptable because the requirements continue to ensure that the process variables are maintained in the MODES and other specified conditions assumed in the safety analyses and licensing basis. The core reactivity balance can only be determined when the reactor is critical (MODES 1 and 2). Additionally, the Surveillance Frequency is once per 31 EFPD, which only continues to accrue when the reactor is critical. Therefore, reducing the applicable MODES from MODES 1, 2, 3, 4, and 5 to MODES 1 and 2 does not result in a reduction of the verification of this important measure of core design accuracy. This change is designated as less restrictive because the LCO requirements are applicable in fewer operating conditions than in the CTS.

Davis-Besse Page 2 of 4 Attachment 1, Volume 6, Rev. 1, Page 31 of 307

Attachment 1, Volume 6, Rev. 1, Page 32 of 307 DISCUSSION OF CHANGES ITS 3.1.2, REACTIVITY BALANCE L02 (Category4- Relaxation of Required Action) CTS 3.1.1.1 does not contain Actions to follow if the core reactivity balance Surveillance is not met. If the core reactivity balance Surveillance was not met, LCO 3.0.3 would be entered.

LCO 3.0.3 requires the plant to be in MODE 3 within 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months , MODE 4 within 13 hours1.50463e-4 days 0.00361 hours 2.149471e-5 weeks 4.9465e-6 months , and MODE 5 within 37 hours4.282407e-4 days 0.0103 hours 6.117725e-5 weeks 1.40785e-5 months . ITS 3.1.2 contains ACTIONS to follow if the core reactivity balance LCO is not met. If the LCO is not met, 7 days is provided to re-evaluate the core design and safety analysis, to determine that the reactor core is acceptable for continued operation, and to establish appropriate operating restrictions and SRs. If these actions are not completed within the 7 days, the plant must be in MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . This changes the CTS by providing 7 days to evaluate and provide compensatory measures for not meeting the core reactivity balance requirement, and then requiring entry into MODE 3 instead of requiring an immediate shutdown and entry into MODE 5.

The purpose of CTS 4.1.1.1.2 is to verify the accuracy of the core design by comparing the predicted and actual core reactivity balance throughout core life.

This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the operability status of the redundant systems of required features, the capacity and capability of remaining features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the repair period. Should the core reactivity balance requirement not be met, time is required to determine the cause of the disagreement and what, if any, adjustments are needed to the operating conditions of the core. The startup physics testing program is used to verify most of the critical core design parameters, such as control rod worth, boron worth, and moderator temperature coefficient. In addition, there is considerable conservatism in the application of these values in the accident analysis. Therefore, allowing a time to evaluate the difference and make any adjustments to the operational controls is acceptable. The 7 day Completion Time is reasonable considering the complexity of the evaluations and the time to meet administrative requirements, such as 10 CFR 50.59 safety evaluation preparation and approval. If it cannot be determined within 7 days that the core is acceptable for continued operation, the unit must be shutdown. This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

L03 (Category 7- Relaxation of Surveillance Frequency - Non-24 Month Type Change) CTS 4.1.1.1.2 requires the overall core reactivity balance to be compared with the predicted value once per 31 EFPD. The CTS also requires the predicted core reactivity values to be adjusted (normalized) to correspond to the actual core conditions prior to exceeding a fuel burnup of 60 EFPD after each fuel loading. ITS SR 3.1.2.1 also allows the measured core reactivity balance to be compared to the predicted values every 31 EFPD, but the ITS SR is only required after 60 EFPD of core burnup, consistent with the CTS. The ITS also allows the adjustment of the predicted values to the actual values prior to exceeding a fuel burnup of 60 EFPD after each fuel loading. In addition, Note 2 to SR 3.1.2.1 is included which states that the SR is not required to be performed Davis-Besse Page 3 of 4 Attachment 1, Volume 6, Rev. 1, Page 32 of 307

Attachment 1, Volume 6, Rev. 1, Page 33 of 307 DISCUSSION OF CHANGES ITS 3.1.2, REACTIVITY BALANCE in MODE 2. This changes the CTS by not requiring the periodic, at-power core reactivity balance comparison until core burnup reaches 60 EFPD.

The purpose of CTS 4.1.1..1.2 is to verify the agreement between the actual and predicted core reactivity balance. This change is acceptable because the new Surveillance Frequency has been evaluated to ensure that it provides an acceptable level of reliability. The CTS and the ITS requires the predicted core reactivity values to be normalized to the actual values prior to exceeding 60 EFPD of core burnup. This allows sufficient time for core conditions to reach steady state, but prevents operation for a large fraction of the fuel cycle without establishing a benchmark for the design calculations. The required subsequent Frequency of 31 EFPD, following the initial 60 EFPD after fuel loading, is acceptable, based on the slow rate of core changes due to fuel depletion and the presence of other indicators (QUADRANT POWER TILT, etc.) for prompt indication of an anomaly. In addition, a new Frequency has been added to ensure core reactivity balance is within limits prior to entering MODE 1 after each fuel loading (see DOC M01). Furthermore, a Note has been included that states the SR is not required to be performed prior to entry into MODE 2. This allowance clarifies that the SR is to be performed at power conditions and not when the reactor is critical. This change is designated as less restrictive because Surveillances will be performed less frequently under the ITS than under the CTS.

Davis-Besse Page 4 of 4 Attachment 1, Volume 6, Rev. 1, Page 33 of 307

Attachment 1, Volume 6, Rev. 1, Page 34 of 307 Improved Standard Technical Specifications (ISTS) Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 34 of 307

Attachment 1, Volume 6, Rev. 1, Page 35 of 307 Reactivity Balance:

3.1.2:

CTS 3.1 REACTIVITY CONTROL SYSTEMS 3.1.2 Reactivity Balance DOC A02 LCO 3.1.2 The measured core reactivity balance shall be within _+1 % Aldk of.

predicted values.

3.1.1.1 APPLICABILITY: MODES 1 and 2.

Aprlicabilitv ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME DOC L02 A. Measured core reactivity A.1 Re-evaluate core design 7 days balance not within limit. and safety analysis and determine that the reactor core is acceptable for continued operation.

AND.

I A.2 Establish appropriate operating restrictions and 7 days SRs.

DOC L02 B. Required Action and B.1 Be in MODE 3. .6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months associated Completion Time not met.

BWOG STS 3.1.2-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 35 of 307

Attachment 1, Volume 6, Rev. 1, Page 36 of 307 Reactivity Balance 381 ;2 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY 4.1.1.1.2 SR 3.11.2.1 NOTES --.....-----

1. The predicted reactivity values F be adjusted (normalized)ito correspond to the measured 0

core reactivity prior to exceeding a fuel burnup of 60 effective full power days (EFPD) after each fuel loading.

2. This Surveillance is not required to be performed prior to e.ntry into- MODE 2.

DOC M01 Verify measured core reactivity balance is within Prior to entering

+ 1% Ak/k of predicted values. MODE 1 after each fuel loading AND NOTE -------- -

Only required after 60 EFPD 31 EFPD thereafter BVWOG STS 3.1.2-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 36 of 307

Attachment 1, Volume 6, Rev. 1, Page 37 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.2, REACTIVITY BALANCE

1. SR 3.1.2.1 has been modified to be consistent with the current licensing basis. The predicted reactivity values shall (not may) be adjusted (normalized) to correspond to the measured core reactivity prior to exceeding a fuel burnup of 60 EFPD after each refueling. This is necessary to ensure there is a benchmark for the design calculations. This change is also consistent with the ISTS Bases.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 37 of 307

Attachment 1, Volume 6, Rev. 1, Page 38 of 307 Improved Standard Technical Specifications (ISTS) Bases Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 38 of 307

Attachment 1, Volume 6, Rev. 1, Page 39 of 307 Reactivity Balance.

B 3.1.2 B.3.1 REACTIVITY CONTROLLSYSTEMS B 3.1.2 Reactivity Balance, BASES BACKGROUND According to GDC 26, GDC 28, and GDC 29 (Ref. 1), re ctivity shall be maintained unde cold conditions, 4 NSERT

- i controllable

---:and accept ble fuelthat.subcriti such areis not exceeded duinnq normal design Ii itslity

peration *nd anticlpated~prta ocuine.JTeeoe, h startup and reactivity balance is used aS a measure of the predicted versus measured core reactivity duringIpower operation. The periodic.confirmationsof.core 0 reactivity is necessary to ensure that safety analysesa of'design basis transients and accidents remain valid. A large reactivity difference could be the resultof unanticipated changes in fuel, CONTROL R.OD, or burnable, poison worth, or operation at conditions not consistent with those assumed in the predictions of core reactivity. These could potentially result in a loss of SDM or violation of acceptable. fuel.design limits. Comparing predicted versus measured core reactivity validates the nuclear methods used in the safety analysis and supports the SDM demonstrations: (LCO 3.1.1, "SHUTDOWN MARGIN (SDM)"): in ..ensuring the reactor can be brought safely to cold, subcritical conditions.

When the reactor core is critical or in normal power operation, a reactivity balance exists and the net reactivity is zero. Acomparison of predicted and measured reactivity is convenient'under esuch a balance, since parameters are being maintainedrelatively stable under steady state power conditions. The positive reactivity inherent in the core design is balanced by the negative reactivityof the control components, thermal feedback, neutron leakage, and materialsf in the corethat absorb neutrons, such as burnableabsorbers, producing zero het reactivity.

Excess reactivity can be inferred.from theL boron.letdown, curve (or critical.

boron curve), which provides an indication of the soluble boron concentration in the Reactor Coolant System (RCS) versus cycle burnup.

Periodic measurement of the RCS boron concentration.for comparison with the predicted Value with other variables fixed, (such as rod height, temperature, pressure, and power), provides a convenient method of ensuring that core reactivity is within design expectations, and .that the calculational models used to generate the safety analysis areadequate.

BVWOG STS B 3.1.2-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 39 of 307

Attachment 1, Volume 6, Rev. 1, Page 40 of 307 B 3.1.2 INSERT I 0

Two independent reactivity control systems of different design principles are provided. The Control Rod Drive System utilizes control rods and is capable of reliably controlling the rate of reactivity changes and ensures that, under conditions of normal operation, including anticipated operational occurrences, and with appropriate margin for malfunctions such as stuck rods, specified fuel design limits are not exceeded. The Makeup and Purification System is capable of controlling the rate of reactivity changes resulting from planned normal power changes (including xenon burnout) to ensure that acceptable fuel design limits are not exceeded. The Makeup and Purification System has the ability to initiate and maintain the cold shutdown condition in the reactor (Ref. 1).

0 Insert Page B 3.1.2-1 Attachment 1, Volume 6, Rev. 1, Page 40 of 307

Attachment 1, Volume 6, Rev. 1, Page 41 of 307 Reactivity Balance B 3.1 .2' BASES BACKGROUND (continued)

In. order to achieve the required fuel cycle energy output, the :uranium:

enrichment in the new fuel loading and the fuel remaining from the previous cycle provides excess positive reactivity beyond that required to sustain. steady state operation throughout the cycle. When the reactor is critical at RTP and moderator temperature, the excess positive reactivity is compensated by burnable absorbers (if any), CONTROL RODS, whatever neutron poisons (mainly xenon and samarium) are present in the fuel, and the RCS boron concentration.

When.the core is producing THERMAL POWER, the fuel is being depleted and excess reactivity isdecreasing. As the fuel depletes, the RCS boron concentration is reduced to decrease negative reactivity, and maintain constant*THERMAL POWER. The boron letdown curveS based on steady. state operation at RTP. Therefore, deviations from the predicted boron letdown curve may indicate deficiencies. in the design

analysis, deficiencies in the calculational models, or abnormal core conditions, and must be evaluated.

APPLICABLE The acceptance criteria for core reactivity are the establishment of SAFETY the reactivity balance limit to ensure that plant operation is maintained ANALYSES within the assumptions of the safety analyses.

Accurate prediction of core reactivity is either an explicit-or implicit assumption in the accident analysis evaluations. Every. accident evaluation (Ref. 2)'is, therefore, dependent upon accurate evaluation of core reactivify. In particular, SDM and reactivity transients, such as

'CONTROL ROD Withdrawal accidents or rod ejection accidents, are very sensitive .to accurate prediction of core reactivity. These accident analysis evaluations rely on computer codes which have been qualified against available test data, operating plant data,.and analytical benchmarks. Monitoring reactivity balance ensures that the nuclear methods provide an accurate representation of the core reactivity, Design calculations.and safety analyses are performed for each fuel cycle for the purpose ofpredetermining reactivity behavior and the RCS boron concentration requirements for reactivity control during fuel depletion.

The comparison between measured and predicted initial core reactivity provides a normalization for.the calculational models used to predict core reactivity. If the measured and predicted RCS boron concentrations for identicalcore conditions at'beginning of cycle (BOC) do not agree, then the assumptions used in the reload cycle design ana.lysis or the BWAOG STS B 3.1.2-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 41 of 307

Attachment 1, Volume 6, Rev. 1, Page 42 of 307 Reactivity Balance B *3.1.:2 BASES APPLICABLE SAFETY ANALYSES (continued) calculational models used to:predict soluble boron requirements may not be accurate. If reasonable agreement between measured and predicted.

core reactivity exists at BOC, 'then the-prediction may be normalized to the measured boron concentration. Thereafter,, any significant deviations in the measured boron Concentration fromrthe predicted boron letdown curve, which is developed during fuel depletion, may be an indication that the calculational model is not adequate for core burnups beyond BOC, or that an unexpected change in core conditions has occurred.

The normalization of predicted RCS boron concentration to the measured value is typically performed after reaching RTP following startup from a refueling outage, withthe CONTROL RODS in their normal positionsfor power operation. The normalization is performed at BOC conditions, so that core reactivity relative to predicted values can be continually monitored and evaluated, as core conditions change during the cycle.

Reactivity balance satisfies Criterion 2 of 10 CFR 50.36(c)(2)(ii).

LCO Long term core reactivity behavior is a result~of the core physics design and cannot be easily controlled, once' the core design is fixed. During operation, therefore, the conditions of the LCO can only be ensured through measurement and tracking, and appropriate actions taken as necessary. Large differences between actual and predicted core reactivity may indicate thatthe assumptions of the Design Basis Accident (DBA) and transient analyses are no longer valid, orthat the uncertainties in the nuclear design methodology are larger than expected. A limit on the reactivity, of +/- 1% Ak/k has, been established, based on engineering judgment. A +/- 1% Ak/k deviation:in reactivity.from that predicted is larger than expected for normal operation and should therefore be evaluated.

When measured Core reactivity is within 1% Ak/k of the predicted Value at steady state thermal conditions, the core is considered to be operating within acceptable design limits. Since, deviations from the limit are normally detected by comparing predicted and measured steady state RCS critical boron concentrations, the, difference between measured and predicted values would .be approximately 100 ppm (depending on the boron worth) before the limitis reached. These values arewell within the uncertainty limits for analysis of boron concentration samples, so that spurious violations of the limit due to uncertainty in measuring the RCS boron concentration are unlikely.

BVVOG STS B 3.1.2-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 42 of 307

Attachment 1, Volume 6, Rev. 1, Page 43 of 307 Reactivity Balance B 3.1.2:

. BASES.

APPLICABILITY In MODES 1 and .2:during fuelcycle operation with kefi - 1, the limits on core reactivity must be maintained, because a reactivity'balance must exist when the reactor is critical, or producing THERMAL POWER... As the fuel depletes, core, conditions are changing, and confirmation of the reactivity balance ensures the core is o perating as;.designed.

This Specification does-not apply in MODES 3, 4, and.5, because the reactor is shutdown and changes to core reactivity due to fuel depletion cannot occur.

In MODE 6, fuel loading results in a continually changing core reactivity.

Boron concentration requirements (LCO 3.9.1., "Refueling Boron Concentration") ensure that fuel movements are performed within the bounds of the:safety analysis, and an.SDM demonstration is.required during the. first startupfollowing opera'tions that could have altered core reactivity (e.g., fuel movement or CONTROL ROD replacement or shuffling).

ACTIONS A.1 and A.2 Should an anomaly develop between measured and predicted core reactivity, an evaluation of the core design and safety~analysis must be performed. Core conditions are evaluated to determine their consistency with input to design calculations. Measured.core and process parameters are evaluated to determine thatthey are within the bounds of the safety analysis, and safety analysis calculational models are reviewed toverify that they are adequate for representation of the core conditions. The required Completion Time of 7 days is based onthe low probability of a DBA occurring during this period, and allows sufficient time to assess the physical condition of the reactor and. complete the evaluation of the core design and safety analysis.

Following evaluations of the core design and safety analysis, the cause: of the reactivity anomaly may be resolved. If the cause of the reactivity anomaly is a mismatch in core conditions at the time of RCS boron concentration sampling, thena recalculation of the RCS boron concentration requirements may be performed to demonstrate that core reactivity is behaving as expected. If an unexpected physical change in the condition of the core has occurred, it must be evaluated and corrected, if possible. If the causeof the reactivity anomaly is in the calculation technique, then the calculational models must be revised to provide more accurate predictions. Ifany of these results are O BWOG STS B 3.1.2-4 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 43 of 307

Attachment 1, Volume 6, Rev. 1, Page 44 of 307 Reactivity Balance B ý3.1.2 BASES, ACTIONS .(continued)

Ademonstrated, and it is concluded that the reactor core is acceptable for

,continued operation, then the boron letdown curve: may be renormalized, and power-operation may continue. If operational restrictions orý

,additional surveillance requirements are necessary to ensure the reactor

,core is acceptable for continued operation, then they must be defined.

The required Completion Time of 7 days is adequate for preparing operating restrictions or surveillances that may be required.-to allow continued reactor operation.

B.1 [any Required Action and associated Completion Time cannot be met If the e reactivity ca rdt be restored to-vthin the 1%Y limi, the unit must be brought to a MODE in which the LCO does not apply. To achieve this status, the unit must be brought to at least MODE 3 within

.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . If the SDM for MODE 3 is not met, then boration required by Required Action A.1 of LCO 3.1.1 would occur. The allowed Completion Time of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is reasonable, based on operating experience to reach the required unit conditions from full power conditions in an orderly manner and without challenging unit systems.

SURVEILLANCE REQUIREMENTS SR 3.1.2.1 THERMAL POWER Core reactivity is Verified by periodic comparisons of measured and RCS average predicted RCS boron concentrations. The comparison is made and A5--considering that other core onditions are fixed or stable, including CONTROL RODpositions, moeator temperature, fuel fnper a r fuel ebumup basleygeeraos on de ion xenon concentration, and samarium concentration. The Surveillance is performed prior to entering MODE 1 as an initial check-on core conditions and design calculations at BOC. ANote is included in.the SR to indicate that the normalization of predicted core reactivity to the measured value must take place within the first 60 effective full power days (EFPD) after each fuel loading. Thisallows sufficient time for core conditions to reach steady state, but prevents -operation for a large fraction of the fuel cycle without establishing a benchmark for the design:

calculations. The required subsequent Frequency of 31 EFPD, following the initial 60 EFPD after entering MODE. 1 is acceptable, based on the slow rate of core,-reactivity changes due to fuel depletion and the presence of other indicators (QPT, etc.) for prompt indication of an

'anomaly. Another Note is included in the SRs to indicate that the performance of the Surveillance is not required for entry into MODE 2.

BwoG STS B 3.1.2-5 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 44 of 307

Attachment 1, Volume 6, Rev. 1, Page 45 of 307 Reactivity Balance B 3.1.2 UFSAR, Appendices 3D.1.22, Criterion 26 - Reactivity Control System Redundancy and Capability; 3D.1.24, Criterion 28 - Reactivity Limits; and 3D.1.25, Criterion 29 - Protection Against Anticipated Operational Occurrences D'Accc REFERENCES 1.2 IR .. 26, GDQSetioand1GD5 2d 0

,2ý. \ FSAR, Plbateý-l . [ Section 15 00 S

BWOG STS B 3.1.2-6 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 45 of 307

Attachment 1, Volume 6, Rev. 1, Page 46 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.2 BASES, REACTIVITY BALANCE

1. Changes are made (additions, deletions, and/or changes) to the ISTS Bases which reflect the plant specific nomenclature, number, reference, system description, analysis, or licensing basis description.

2. Changes have been made to be consistent with the Specification.

3. The brackets have been removed and the proper plant specific information/value has been provided.

4. Davis-Besse was designed and under construction prior to the promulgation of 10 CFR 50, Appendix A. The design of Davis-Besse meets the intent of 10 CFR 50, Appendix A published in the Federal Register on February 20, 1971, and as amended in Federal Register on July 7, 1971. Bases references to the 10 CFR 50, Appendix A criteria have been replaced with references to the appropriate section of the UFSAR.

Davis-Besse Page 1 of I Attachment 1, Volume 6, Rev. 1, Page 46 of 307

Attachment 1, Volume 6, Rev. 1, Page 47 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 47 of 307

Attachment 1, Volume 6, Rev. 1, Page 48 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS ITS 3.1.2, REACTIVITY BALANCE There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 48 of 307

Attachment 1, Volume 6, Rev. 1, Page 49 of 307 ATTACHMENT 3 ITS 3.1.3, MODERATOR TEMPERATURE COEFFICIENT (MTC)

Attachment 1, Volume 6, Rev. 1, Page 49 of 307

, Volume 6, Rev. 1, Page 50 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs) , Volume 6, Rev. 1, Page 50 of 307

Attachment 1, Volume 6, Rev. 1, Page 51 of 307 ITS 3.1.3 ITS REACTIVITY CONTROL SYSTEMS MODERATOR TEMPERATURE COEFFICIENT LIMITING CONDITION FOROPERATION LCO 3.1.3 3.1.1.3 The moderator temperature coefficient (MTC) shall be:

a. Less positive than 0.9 x 10' Ak/k/°F whenever THERMAL POWER is < 95% of RATED THERMAL POWER.

b. Less positive than O.Ox l10- &k/k/*F whenever THERMAL POWER is > 95% of RATED THERMAL POWER, and M0'

c. Eual to or le negativ I the limit provided in the CORE OPERATING LIMITS REPORT at RATED THERMAL POWER.

APPLICABILITY: MODES 1 and .A0 ACTION: M02 ACTION A With the moderator temperature coefficient outsidelany of the above limits, be in at least HOT STANDBY within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

SURVEILLANCE REQUIREMENTS SR 3.1.3.2 4.1.1.3.1 The MTC shall be determined to be within its limits by confirmatory A03 measurements. MTC measured values shall be extrapolated and/or compensated to permit direct comparison with the above limits.

SR 3.1.3.1, 4.1.1.3.2 The MTC shall be determined at the following frequencies and SR 3.1.3.2 THEIAL POWER conditions during each fuel cycle:

SR 3.1.3.1 a. Prior to initial operation above 5% of RATED THERMAL POWER, after each fuel loading.

SR 3.1.3.2 b. At any THERMAL POWER, within 7 days after reaching a RATED THERMAL POWER equilibrium boron concentration of 300 ppm.

M02

Wit k ff> 1.0.

J#See Specia Exce A02 DAVIS-BESSE, UNIT I 3/4,1-4 Amendment No. 5, 154 Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 51 of 307

Attachment 1, Volume 6, Rev. 1, Page 52 of 307 DISCUSSION OF CHANGES ITS 3.1.3, MODERATOR TEMPERATURE COEFFICIENT (MTC)

ADMINISTRATIVE CHANGES A01 In the conversion of the Davis-Besse Current Technical Specifications (CTS) to the plant specific Improved Technical Specifications (ITS), certain changes (wording preferences, editorial changes, reformatting, revised numbering, etc.) are made to obtain consistency with NUREG-1430, Rev. 3.1, "Standard Technical Specifications-Babcock and Wilcox Plants" (ISTS).

These changes are designated as administrative changes and are acceptable because they do not result in technical changes to the CTS.

A02 The Applicability of CTS 3.1.1.3 is modified by footnote # that states "See Special Test Exception 3.10.1." ITS 3.1.3 Applicability does not contain the footnote or a reference to the Special Test Exception.

The purpose of the footnote reference is to alert the user that a Special Test Exception exists that may modify the Applicability of the Specification. It is an ITS convention to not include these types of footnotes or cross-references. This change is designated as administrative because it does not result in technical changes to the CTS.

A03 CTS 4.1.1.3.1 requires MTC to be determined to be within limits by confirmatory measurements. MTC measured values shall be extrapolated and/or compensated to permit direct comparison with the above limits. CTS 4.1.1.3.2.a requires MTC to be determined prior to initial operation above 5% RTP after each fuel loading and CTS 4.1.1.3.2.b requires MTC to be determined at any THERMAL POWER, within 7 days after reaching a RATED THERMAL POWER equilibrium boron concentration of 300 ppm. ITS SR 3.1.3.1 requires verification that MTC is within the upper limit specified in the COLR prior to entering MODE 1 after each fuel loading and ITS SR 3.1.3.2 requires verification that the extrapolated MTC is within the lower limit specified in the COLR each fuel cycle within 7 effective full power days (EFPDs) after reaching an equilibrium boron concentration equivalent to 300 ppm. In addition, ITS SR 3.1.3.2 includes a Note that states "If the MTC is more negative than the COLR limit when extrapolated to the end of cycle, SR 3.1.3.2 may be repeated. Shutdown must occur prior to exceeding the minimum allowable boron concentration at which MTC is projected to exceed the lower limit." This changes the CTS by clarifying that during the performance of CTS 4.1.1.3.2.a (ITS SR 3.1.3.1) the upper MTC limit is checked and during the performance of CTS 4.1.1.3.2.b (ITS SR 3.1.3.2) the lower limit is checked. In addition, the change clarifies that ifthe MTC is more negative than the COLR limit when extrapolated to the end of cycle, SR 3.1.3.2 may be repeated and a shutdown is not required until MTC is projected to exceed the lower limit.

This change is acceptable because the requirements have not changed. The change clarifies that during the performance of CTS 4.1.1.3.2.a (ITS SR 3.1.3.1) the upper MTC limit is checked and during the performance of CTS 4.1.1.3.2.b (ITS SR 3.1.3.2) the lower limit is checked. This is consistent with the predicted values of MTC. The predicted values of MTC at the beginning of the cycle (prior to entering MODE 1 after each fuel loading) are higher than the predicted values at the end of the cycle. The Note to SR 3.1.3.2 clarifies the current purpose of Davis-Besse Page 1 of 3 Attachment 1, Volume 6, Rev. 1, Page 52 of 307

Attachment 1, Volume 6, Rev. 1, Page 53 of 307 DISCUSSION OF CHANGES ITS 3.1.3, MODERATOR TEMPERATURE COEFFICIENT (MTC)

CTS 4.1.1.3.1. CTS 4.1.1.3.1 requires MTC to be determined to be within limits by confirmatory measurements. MTC measured values shall be extrapolated and/or compensated to permit direct comparison with the above limits. The Note to ITS SR 3.1.3.2 states if the MTC is more negative than the COLR limit when extrapolated to the end of cycle SR 3.1.3.2 may be repeated. A Surveillance Requirement can always be repeated to clarify the results or to obtain a more precise prediction of MTC. CTS 3.1.1.3 requires MTC to be met and the CTS 3.1.1.3 Action only requires entry when MTC is not within limit. Since ITS SR 3.1.3.2 states to verify the extrapolated MTC is within limit, the remainder of the Note to SR 3.1.3.2 clarifies that a shutdown is not required until the actual limit is exceeded. This change is designated as administrative because it does not result in a technical change to the CTS.

MORE RESTRICTIVE CHANGES M01 CTS LCO 3.1.1.3.a and LCO 3.1.1.3.b provide the maximum limits of the upper (positive) value for the moderator temperature coefficient (MTC). ITS LCO 3.1.3 maintains these maximum upper limits, but also includes a requirement that the MTC must be within the limit specified in the COLR. This changes the CTS by placing a cycle-specific upper limit (which may be less than the limit maintained in ITS LCO 3.1.3) in the COLR.

The purpose of the CTS LCO 3.1.1.3 upper MTC limits is to ensure inherently stable power operations result during normal operation and accidents, such as overheating and overcooling events. MTC values are bounded in reload safety evaluations, assuming steady state conditions. This change is acceptable because the ITS will still maintain the maximum limits of the upper MTC value.

The COLR will now contain the cycle-specific value for the upper MTC value, which may be less than the maximum allowed in ITS 3.1.3. This change is designated as more restrictive because the cycle-specific upper limit in the COLR may be more restrictive than the maximum value of the upper limit in ITS LCO 3.1.3.

M02 CTS 3.1.1.3 requires MTC to be applicable in MODES 1 and MODE 2 with keff

> 1.0. ITS 3.1.3 requires MTC to be within limits in MODES 1 and 2. This changes the CTS by expanding the applicability of the MTC requirements to include MODE 2 with keff < 1.0.

The purpose of the CTS 3.1.1.3 is to ensure that MTC is within limit. This change is acceptable because the ITS requires MTC to apply at all times in MODES 1 and 2 to help ensure MTC is maintained. This change is designated as more restrictive because it expands the Applicability for MTC.

RELOCATED SPECIFICATIONS None Davis-Besse Page 2 of 3 Attachment 1, Volume 6, Rev. 1, Page 53 of 307

Attachment 1, Volume 6, Rev. 1, Page 54 of 307 DISCUSSION OF CHANGES ITS 3.1.3, MODERATOR TEMPERATURE COEFFICIENT (MTC)

REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None Davis-Besse Page 3 of 3 Attachment 1, Volume 6, Rev. 1, Page 54 of 307

Attachment 1, Volume 6, Rev. 1, Page 55 of 307 Improved Standard Technical Specifications (ISTS) Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 55 of 307

Attachment 1, Volume 6, Rev. 1, Page 56 of 307 1MTC 3.1.3:

CTS 3.1 REACTIVITY CONTROL SYSTEMS 3.1.3 Moderator Temperature Coefficient (MTC) 3.1.1.3 LCO 3.1.3 The MTC shall be maintained within the. limits specified inlthe COLR. The, maximum mit shall bel 0 01-2ýA/k

<0.9 x10 Ak./k°F

, at <95% RTP and 4

<0.0 X10- Ak/k/°F at > 95% RTP APPLICABILITY: MODES 1 and 2.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME 3.1.1.3 A. MTC not within limits. A.1 Be in MODE 3. '6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months Action SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY:

0 4.1.1.3.2.a SR 3.1.3.1 Verify MTC is within the upper limit specified in the Prior to entering COLR. , MODE 1 after each 'fuel loading 4.1.1.3A1, SR 3.1.3.2- -------------------- NOTE---- ------------

4.1.1.3.2.b If the MTC is more negative than the COLR limit when extrapolated to the end of cycle, SR 3.1.3.2 may be repeated. Shutdown must occur prior:to exceeding the minimum allowable boron concentration at which MTC is projected to exceed the lower limit..

Verify extrapolated MTC is within the lower limit Each fuel cycle:

specified in the COLR. within 7 EFPDs after reaching an equilibrium boron concentration equivalent to 300oppm BVVOG STS 3.1.3-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 56 of 307

Attachment 1, Volume 6, Rev. 1, Page 57 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.3, MODERATOR TEMPERATURE COEFFICIENT (MTC)

1. ISTS LCO 3.1.3 specifies requirements for the "maximum positive limit" of MTC.

ITS LCO 3.1.3 specifies requirements for the "maximum upper limit." This change is necessary to match up with the terminology in ISTS SR 3.1.3.1 (ITS SR 3.1.3.1).

2. The brackets have been removed and the proper plant specific information/value has been provided.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 57 of 307

Attachment 1, Volume 6, Rev. 1, Page 58 of 307 Improved Standard Technical Specifications (ISTS) Bases Markup and Justification for Deviations (JFDs) 0 Attachment 1, Volume 6, Rev. 1, Page 58 of 307

Attachment 1, Volume 6, Rev. 1, Page 59 of 307 MTC B 3.1.3 B 3.1 REACTIVITY CONTROL SYSTEMS B 3.1.3 Moderator Temperature Coefficient (MTC)

BASES UFSAR, Appendix 3D1.7 ] j

/-C INSERT 1 BACKGROUND According to (Reqf. ) the actor core and its inter.tion with theý.

Reactor Cooln System (R C) n st be designed for inher ntly stable power oper 'ion,even in the po sible event of an acciden . In particular, 0

the net rea tivity feedback in t e systemmust com ensa e for an unintendegfreactivity increas s.

The MTC relates a change in core reactivity to a change in reactor coolant temperature (a positive MTC means that reactivity increases with, increasing moderator temperature; conversely, a negative MTC means that reactivity decreaseswith increasing moderator temperature). The reactor is designed to operate with a negative MTC over the largest possible range of fuel cycle operation. Therefore, a coolant temperature increase will cause a reactivity decrease, so that the coolant temperature tends to return toward its initia!:value. Reactivity increases that cause a coolant temperature increase will thus be self limiting, and stable power operation will result. The same characteristic is true when the MTC is positive and coolanttemperature decreases occur.

MTC values are predicted at selected burnups during the safety evaluation analysis and are confirmed.to be acceptable by

.measurements. Both initial-and reload cores are designed so that the beginning of cycle (BOC) MTC is less than zero when THERMAL POWER is 95% RTP or greater. The actual value of the MTC is dependent on core characteristics, such as fuel loading and reactor coolant soluble boron concentration. The core design may require additional burnable absorbers to yield an MTC at BOC within the range, analyzed in the plant accident analysis. The end of cycle (EOC) MTC is also limited by the requirements of the accident analysis. Fuel cycles that are designed.to achieve high burnups or that have changes to other characteristics are evaluated to ensure the MTC does not exceed the.

EOC limit.

APPLICABLE Reference 2 contains analyses of accidents that result in both SAFETY overheating and overcooling of the :reactor core. MTC is one of the ANALYSES controlling parameterstfor core reactivity in these accidents. Both the most positive value and most negative value, of the MTC are initial conditions inthe safetyanalyses, and both values must be bounded.

Values used inthe analyses consider worst case conditions, such as very large soluble boron concentrations, to ensure the accident results are bounding (Ref. 3).

BVVOG STS B 3.1.3-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 59 of 307

Attachment 1, Volume 6, Rev. 1, Page 60 of 307 B 3.1.3 INSERT I 0

the reactor core and associated coolant systems are designed so that in the power operating range the net effect of the prompt inherent nuclear feedback characteristics tends to compensate for rapid increase in reactivity. The overall power coefficient, which is the fractional change in neutron multiplication per unit change in core power level, is negative in the power operating range.

Insert Page B 3.1.3-1 Attachment 1, Volume 6, Rev. 1, Page 60 of 307

Attachment 1, Volume 6, Rev. 1, Page 61 of 307 MTC

.B 3.1 ,3

. :BASES APPLICABLE:SAFETY AN ALYS ES (continued)

The acceptance criteria for the specified MTC are:

a. The MTC values must remain within the bounds of'those used in the accident analysis (Ref. 2)\and O

b. The MTC must be such that inherently stable power operations result during normal operation and accidents, such as overheating and overcooling events.

Accidents that cause core overheating (either decreased heat removal or increased power production) must be evaluated for results when the, MTC is positive. Reacivity accilents that cause increased power production include'the ýOI RO withdrawal transient from either zero or full THERMAL POWER. The limiting overheating event relative to plant response is based on the maximum difference between core power and a;t 0%Rp-SThe most limiting event with steam generator heat removal during a transient; The most limiting event

%TPwith respect to positive MTCOis h [rod with Ipower, alg_9/ge-ree- tasa a

startup accident (Refi. 49_:

n rom zerol I c*

respect to positive MVTC at power is a large break Loss of Coolant Accident (Ref. 5). Accidents that cause core overcooling must be evaluated for results when the MTC is most negative. The event that produces the most rapid cooldown of the RCS, and is therefore the most limiting event with i respect to the negative MTC, is asteam line break (6LB).event. ll(P" Following the reactor trip for the postulated EOC SLB event, the large moderator temperature reduction, combined with the large negative MTC, may produce reactivity increases that are as much as the shutdown reactivity. When this o9curs, a substantial fraction of.core power is produced with all FCObNrROI[& assemblies inserted, except the most reactive, one. Even if the reactivity increase produces slightly subcritical conditions, a large fraction of core power may be produced through the effects of subcritical neutron multiplication.

MTC values are bounded in reload safety evaluations, assuming steady state conditions at BOC and EOC. A near EOC measurement is conducted at conditions when the RCS boron concentration reaches approximately 300 ppm. The measured value may.be extrapolated to project the EOC value, in order to confirm reload design predictions..

MTC satisfies Criterion 2 of 10 CFR 50.36(c)(2)(ii).

BV\BOG STS B 3.1.3-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 61 of 307

Attachment 1, Volume 6, Rev. 1, Page 62 of 307 MTC:

B 3.1.3 O BASES LCO LCO 3.*1 3 requires the .MTC to be within specified limits in the COLR to ensure the core operates within the assumptions of the accident-analysis.

During the reload core safetyevaluation, the MTC is analyzed to UFSAR determine that its values remain within the bounds of the htaýccident analysis during operation. The LCO.establishes a maximum positive value that can not be exceeded. The limit of +0.9E-4 F]_Ak/l*!°F.on positive. MTC, when THERMAL POWER is < 95% RTP, ensures that core overheating accidents will not violate the accident analysis assumptions.

The requirement for a negative MTC, when THERMAL POWER is 2:95% RTP, ensures that core operation will be stable. The negative MTC limit for EOC specified in the COLR ensures that core overcooling accidents. will not Violate the accident analysis assumptions.

MTC is a core physics parameter determined by the fuel~and fuel cycle design and cannot be easily controlled once the core design is fixed during operation, therefore, the LCO can only be ensured through measurement. The surveillance checks at BOC and EOC on MTC provide confirmation that the MTC is behaving as anticipated, so that the acceptance criteria are met.

APPLICABILITY In MODE 1, the limits on MTC must be maintained to ensure that any accident initiated from THERMAL POWER operation will not violate the design assumptions of the accident analysis. In MODE 2, the limits must also be maintained to ensure that startup and subcritical accidents, such asthe uncontrolled CONTROL ROD assembly or group withdrawal,,will not violate the assumptions of the accident analysis. In MODES 3, 4, 5, and 6, this LCO is not applicable, since no Design Basis Accidents (DBAs) using the MTC as an analysis assumption are initiated from these MODES. However, the variation of MTC with temperature in MODES 3, 4, and 5 for DBAs initiated in MODES 1 and 2 is accounted for in the subject accident analysis. The variation of MTC with temperature measurement is assumed in the safetyanalysis, is accepted as Valid once the BOCOa mlrj e of cycle measureme are used for normalization.

ACTIONS A.1 MTC isa function of the fuel and fuel cycle designs, and cannot be controlled directly once the designs have been implemented in the core.

If MTC exceeds its limits, the reactor must be placed'in MODE 3. This eliminates the potential for violation of the accident analysis * ]. The associated Completion Time of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is reasonable, considering the probability of an accident occurring during the time period that would require an MTC value within the LCO limits, for reaching MODE 3 conditions from full power conditions in an orderly manner and without challenging plant systems.

. BWOG STS B 3.1.3-3 Rev. 3.0, :03/31/04 Attachment 1, Volume 6, Rev. 1, Page 62 of 307

Attachment 1, Volume 6, Rev. 1, Page 63 of 307 MTC B 3.1.3 BASES SURVEILLANCE The following two SRs for measurement ofthe MTC at. the beginning and REQUIREMENTS end of each fuelcycle provide' for confirrmation Of the limiting MTCvalues.

The MTC changes slowly from mostpositive (least negative) to most negative value during fuel cycle operation, as the RCS boron concentration is'reduced with fuel depletion.

SR 3.1.3.1 The requirement~for measurement, prior to initial operation above 5% RTP,. satisfies the confirmatory check on the most positive (least negative) MTC value.

SR 3.1.3.2 The requirement for measurementwithin 7 effective full powerdays (EFPD) after reaching an equilibrium boron concentration of 300 ppm for Iower( RTP, satisfies the confirmatory check on themost negativh positive) MTC Value. The measurement is performed at an'TRERMALL--

0 POWER equivalent.t0oan RCS boron concentration of 300 ppm (for

,steady state operation at RTP with all CONTROL RODS fully withdrawn) so that the projected EOC MTC may be evaluated before the reactor

,actually reaches the. EOC condition. MTC values are extrapolated and compensated to permit.direct comparison to the specified MTC limits.

The SR is modified by a Note. The Note indicates that SR 3.1 .3.2 may be repeated, and shutdown, must Occur, prior to exceeding the minimum allowable boron concentration at which MTC is projected to exceed the lower limit. The minimum allowable boron concentration is obtained from the EOC MTC versus boron concentration slope with appropriate conservatisms. Thus, the projected EOC MTC is-evaluated before the lower limit is actually reached.

REFERENCES 1. 110CFR 50..A131endix A. GDC 111.

2. FSAR,Chat r[141 StonZ5 UFSAR, Appendix 3.D.1.7, Criterion 11 -

Reactor Inherent Protection 00

3. FSAR,Ie n[] - Appe7dix[

4 U

5. UFSAR, Section 15.4.6.8.2. A. FSAR, Section[ti-] II BVVOG STS B 3.1.3-4 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 63 of 307

Attachment 1, Volume 6, Rev. 1, Page 64 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.3 BASES, MODERATOR TEMPERATURE COEFFICIENT (MTC)

1. Typographical/grammatical error corrected.

2. Changes are made (additions, deletions, and/or changes) to the ISTS which reflect the plant specific nomenclature, number, reference, system description, analysis, or licensing basis description.

3. The brackets have been removed and the proper plant specific information/value has been provided.

4. These punctuation corrections have been made consistent with the Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 5.1.3.

5. Changes are made to reflect the Specification.

6. Not used.

7. Davis-Besse was designed and under construction prior to the promulgation of 10 CFR 50, Appendix A. The design of Davis-Besse meets the intent of 10 CFR 50, Appendix A published in the Federal Register on February 20, 1971, and as amended in Federal Register on July 7, 1971. Bases references to the 10 CFR 50, Appendix A criteria have been replaced with references to the appropriate section of the UFSAR.

0 Davis-Besse Page 1 of I Attachment 1, Volume 6, Rev. 1, Page 64 of 307

Attachment 1, Volume 6, Rev. 1, Page 65 of 307 Specific No Significant Hazards Considerations (NSHCs)

S Attachment 1, Volume 6, Rev. 1, Page 65 of 307

Attachment 1, Volume 6, Rev. 1, Page 66 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS ITS 3.1.3, MODERATOR TEMPERATURE COEFFICIENT (MTC)

There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 66 of 307

Attachment 1, Volume 6, Rev. 1, Page 67 of 307 ATTACHMENT 4 ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS Attachment 1, Volume 6, Rev. 1, Page 67 of 307

, Volume 6, Rev. 1, Page 68 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs) , Volume 6, Rev. 1, Page 68 of 307

Attachment 1, Volume 6, Rev. 1, Page 69 of 307 ITS 3.1.4 ITS REACTIVITY CONTROL SYSTEMS 3/4.1. 3 MOVABLE CONTROL ASSEMBLIES GROUP HEIGHT - SAFETY AND REGULATING POD GROUPS -

LIMITING CONDITION FOR OPERATIONS LCO 3.1.3.1 All control (safety and regulating) rods shall be OPERABLE and 3.1.4 positioned within + 6.5% (indicated position) of their group average height.

APPLICABILITY: MODES 11] and 2K ACTION:

ACTION D a. With one or more control rods inoperable d(ue to being Immovabl of excessive frictl~n or mechanical inter/feffren¢ od '/

asa *sut

{knwr{to e untripoablek, determine that the SHUTDOWN MARGIN"*

requirement of Specification 3.1.1.1 is satisfied within one L0 hour and be in at --

least HOT STANDBY within...

6 ..hours.

Add proposed Re-quired Action D.1.2 -

ACTION C b. With more than one control rod mo erab e or misalined Trom its group average height by more than + 6.5Z (indicated position),+be in at *~~Add least HOT N proposea R~equirea ,ActionsC,,1.1 and C;.1 .9 due o causesfrom ot er tM01 ACTIONA C. With one control

/addressed by ACTI r*N a-inoperable above, or/misaligned its group*

average height by more tha + 6.5% (indicated position), POWER OPERATION may continue proviied that within one hour either: L02

. Thdcontrol rod is to OPERABRistatii pIotored d Ai a) e above alignmeftrequirepentsi o r o worA0s

2. [Theczntrol rod,4s declare!*Fop~erablejand the SHUTDOWN Specification 3.1.1.1 issatisfied MARGIN POWER OPERATION may ofthen requirement continue provided that.:

[r Add proposed Required Action A. 1.2 a) An analysis of the potential e ected rod worth Is *- n performed within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months land/the rod worth i S de er \ '

< 0.65,[

Imkined to/b <_1.0%Ak a t ze P power and A* at RITE TnHE RMAL PONER fr the remain*Ter ofi7he _.T lfuel c#'leL and LA0 b) The SHUdTDOWNt MARGIN requirement of Specification 3.1.1.1 is detemined at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , and eeecial Test ceptitons 3.10 and 3.10.21 1 DAVIS-BESSE, UNIT 1 3/4 1-19 Amendment No.178 Page 1 of 4 Attachment 1, Volume 6, Rev. 1, Page 69 of 307

Attachment 1, Volume 6, Rev. 1, Page 70 of 307 ITS 3.1.4 ITS

,REACTIVITY CONTROL..SYSTEMS GROUP HEIGHT -SAFETY AND REGULATING ROD GROUPS LIMITING CONDITION FOR OPEB8TIONS ACTION: (Continued) Add Re proposed id oNt o

ACTIONA C) A power distribution map is obtained from the incore detectors and. FQ and F", are verified to be within their limits within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months , and d) Either the THERMAL POWER level is reduced to < 60% of the 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months - L04 THERMAL POWERallowable or e reactor coolant pump combination within on our and within ours the 10 High Flux Trip Setpoint is reduced to < 70% of the THERMAL L04 POWER allowable for the reactor coolant pump combination, or e) The r ainder of the rods in the group with t e inoperable rod are igned to within +/- .5% of the Inoperab e rod within one A04 hour while maintaining e position of the ds within the llm ts provided in the ORE OPERATING LIMIT REPORT; the TH RMAL POWER level s 11 be restricted p suant to Syecificatlon 3.1.3.6 during subsequent o eration.

Add proposed ACTION 8 M0, S.UILLN REQUIREMENTS SR 3.1.4.1 4.1.3.1.4 The, position of each control rod shall be determined to be within the group average height limit by verifying the Individual rod positions at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months ý-xcept during t meiintervals when-the *smetrc rod monitor Is/noperab-e, hen verify thendvua poiins todf the irod(s), wl h the inoperable asymmetri* rod monitor at least *nce per 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

SR 3.1.4.2 4.1.3.1.2 Each control rod not fully inserted shall be determined to be OPERABLE by movement of at least[g% in any one direction at least once every 92 days. I M04 DAVIS-BESSE, UNIT I 3/4 1-20 Amendment No. 5, If J7, 40,, 196 Page 2 of 4 Attachment 1, Volume 6, Rev. 1, Page 70 of 307

Attachment 1, Volume 6, Rev. 1, Page 71 of 307 ITS 3.1.4 ITS REACTIVITY CONTROL SYSTEMS ROD DROP TIME LIMITING CONDITION FOR OPERATION SR3.1.4.3 3.1.3.4 The. individual safety and regulating rod fully withdrawn Position shall be < 1.58 seconds drop time from the from power interruption at the control rod drive cabinets to 3/4 insertion with:

a. TaYg > 525°F, and

b. All reactor coolant pumps operating.

APPLICABILITY: MODES I and 2.

A-CTION: Add proposed ACTION D ]-03

a. th the drop time of nhysafety or regulat' g rod determined L exceed the above ýlimit, restore the ro/drop time to within the above limit pr)K r to proceedina to MLIf)F I and 2 L09

b. With the rod drop times within limits but determined SR 3.1,4.3 with less than 4 reactor coolant pumps operating, operation provided that THERMAL POWER is restricted to less may proceed Note than equal to the THERMAL POWER allowable for the reactor coolant or pump combination operating at the time of rod drop time measurement.

SURVEILLANCE RE UIREMENTS SR 3.1.4.3 4.1,3.4 The rod drop time of safety and regulating rods strated through measurement prior to reactor criticality: shall be demon-

a. Foral'rods following each removal of the reactor vessel head,

b. For/pecifically affec ividual rods ing any te *ance on or modiflca on to the control ro main-drive 71 ich'could affect th drop time of those 1ecific system L06 rods, and I c. At least on,Weach REFUE dG INTERVAl LO7 DAVIS-ýBESSE, UNIT 1 3/4 1-24 Amendment No. 214 Page 3 of 4 Attachment 1, Volume 6, Rev. 1, Page 71 of 307

Attachment 1, Volume 6, Rev. 1, Page 72 of 307 ITS 3.1.4 ITS 3/4.1 REACTIVITY CONTROL SYSTEMS 3/4.* NORATION CONTROL See ITS 3.1.1, ITS 3.1.ý8, SHUTDOWN MARGIN and ITS 3.1.9 LIMITING CONDITION F.OR OPERATION See__

ITS 3.1.1, and* ITS 3.2.!ý ACTION: See ITS 3.1.1, With the SHUTDOWN MARGIN <. 1% Ak/k, immediately initiate and continueboration ITS 3.1.8, ITS 3.1.9, at >.25 gpm of 7875 ppm boron or its equivalent, until the required SHUTDOWN and ITS 3.2.1 MARGIN is restored. I--

C-1in,~f

,.) IX V

.rnn lt,tL4L.,L P.

f!U

,4-'..,IZ ix-c y'*.c ci.,ux, I 14.1.IA.1 The SHUTDOWN MARGIN shall be determined to be> 1% Ak/k: I L See ITS 3.1.1 and ITS 3.2.1 Required Action D.1.1 a. Within one hourafter detection of an inoperable control rod s) and at jeast once] L08 per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod(s) is inoperable. ýf the inoperable control rod is immovable or untrippable, the above required SHUTDOWN MARGIN shall be SSee increased by an amount at least equal to the withdrawn worth of the immovable or ITS 1.0 untrippable control rod(s). F

b. When in MODES I or 20 , at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , by verifying that regulating rod groups withdrawal is within the limits .ofSpecification 3.1.3.6.

See ITS 7

c. When in MODE 20 within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months prior to achieving reactor criticality by 3221 verifying that the predicted critical control rod position is within the limits of Specification 3.1.3.6.

d. Prior to initial operation above 5% RATED THERMAL POWER after each fuel loading by consideration of the factors of e. below, with the regulating rod groups 3.1.1 at the maximum insertion limit of Specification 3.1.3.6.

See '1 ITS 3.1.1 and ITS 3.2.1 J

ýSee Special lSee LCO 3.7.9, Test Steam Generator 3t04-'Level, foradditional SHUTDOWN,MARGIN re uirements. SITSe.11 seeto with ,- 1n I

'With kSEr < 1 N. T ITSSee3.2 .1 DAVIS-BESSE, UNIT I 3/4 1-1 Amendment. No.4-94 r1-92-. 276 Page 4 of 4 Attachment 1, Volume 6, Rev. 1, Page 72 of 307

Attachment 1, Volume 6, Rev. 1, Page 73 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS

. ADMINISTRATIVE CHANGES A01 In the conversion of the Davis-Besse Current Technical Specifications (CTS) to the plant specific Improved Technical Specifications (ITS), certain changes (wording preferences, editorial changes, reformatting, revised numbering, etc.) are made to obtain consistency with NUREG-1430, Rev. 3.1, "Standard Technical Specifications-Babcock and Wilcox Plants" (ISTS).

These changes are designated as administrative changes and are acceptable because they do not result in technical changes to the CTS.

A02 The Applicability of CTS 3.1.3.1 is modified by footnote

that states "See Special Test Exceptions 3.10.1 and 3.10.2." ITS 3.1.4 Applicability does not contain the footnote or a reference to the Special Test Exceptions.

The purpose of the footnote reference is to alert the user that a Special Test Exceptions exists that may modify the Applicability of the Specification. It is an ITS convention to not include these types of footnotes or cross-references. This change is designated as administrative because it does not result in technical changes to the CTS.

A03 CTS 3.1.3.1 Action c.1 states that with one control rod misaligned from its group average height by more than the rod misalignment requirements, POWER OPERATION may continue provided that within one hour, the affected rod is restored to OPERABLE status within the above alignment requirements.

ITS 3.1.4 does not contain a Required Action stating that the rod must be restored to OPERABLE status within the alignment limits.

This change is acceptable because the technical requirements have not changed. Restoration of compliance with the LCO is always an available Required Action and it is the convention in the ITS to not state such "restore" options explicitly unless it is the only action or is required forclarity. This change is designated as administrative because it does not result in technical changes to the CTS.

A04 CTS 3.1.3.1 Action c.2.e states that with one control rod misaligned from its group average height by more than the rod misalignment requirements, POWER OPERATION may continue provided that the remainder of the rods in the same group as the inoperable rod are aligned to within the allowed rod misalignment of the inoperable rod within one hour while maintaining the position of the rods within the limits as specified in the COLR; the THERMAL POWER level shall be restricted pursuant to Specification 3.1.3.6 during subsequent operation.

ITS 3.1.4 does not contain a similar Required Action.

This change is acceptable because the technical requirements have not changed. Moving the remainder of the rods in a group to within the LCO limit of the misaligned rod while maintaining compliance with all other rod position requirements is simply restoring compliance with the LCO. Restoration of compliance with the LCO is always an available Required Action and it is the convention in the ITS to not state such "restore" options explicitly unless it is the Davis-Besse Page 1 of 10 Attachment 1, Volume 6, Rev. 1, Page 73 of 307

Attachment 1, Volume 6, Rev. 1, Page 74 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS only action or is required for clarity. This change is designated as administrative because it does not result in technical changes to the CTS.

MORE RESTRICTIVE CHANGES M01 CTS 3.1.3.1 Action b states that with more than one control rod inoperable or misaligned from its group average height by more than the allowed rod misalignment, be in HOT STANDBY within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . ITS 3.1.4 ACTION C states that with more than one CONTROL ROD not within alignment limit, verify SDM is within limits or initiate boration to restore required SDM to within limit within one hour, and be in MODE 3 in 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . This changes the CTS by adding new requirements to verify SDM limits or to initiate boration to restore SDM limits.

The purpose of CTS 3.1.3.1 Action b is to place the unit in a condition in which the equipment is not required. More than one CONTROL ROD becoming misaligned from its group average position is not expected, and has the potential to reduce SDM. Therefore, SDM must be evaluated. One hour allows the operator adequate time to determine SDM. Restoration of the required SDM, if necessary, requires increasing the RCS boron concentration to provide negative reactivity. The required Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months for initiating boration is reasonable, based on the time required for potential xenon redistribution, the low probability of an accident occurring, and the steps required to complete the action. This allows the operator sufficient time to align the required valves and start the boric acid pumps. Boration will continue until the required SDM is restored. This change is acceptable because it is consistent with the requirements of the assumptions of the safety analyses to be within the SDM limit. The change has been designated as more restrictive because it adds explicit actions to verify SDM or to restore SDM within limits.

M02 CTS 3.1.3.1 Action c states that with one control rod misaligned, POWER OPERATION may continue provided that certain actions are completed within one hour. If those actions are not complete, CTS 3.0.3 would be entered requiring entry into Hot Standby (MODE 3) within 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months , for a total time from condition discovery to entry into MODE 3 of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . ITS 3.1.4 ACTION B states that if any Required Action and associated Completion Time of Condition A (one CONTROL ROD not within alignment limits) is not met, the unit must be in MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . The shortest Completion Time in ITS 3.1.4 ACTION A is one hour. Therefore, under the ITS, the shortest possible time from discovery of the condition to entry into MODE 3 is 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months . This changes the CTS by providing one less hour for entry into MODE 3 following discovery of a misaligned rod if Required Actions are not met.

The purpose of requiring a shutdown when a rod misalignment cannot be corrected is to bring the unit to a subcritical condition prior to the build up of an undesirable reactor core power distribution. This change is acceptable because it provides an adequate period of time to correct the condition or be in a MODE in which the requirement does not apply. The Completion Time of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is reasonable, based on operating experience, for reaching MODE 3 from full power in an orderly manner and without challenging unit systems. This change Davis-Besse Page 2 of 10 Attachment 1, Volume 6, Rev. 1, Page 74 of 307

Attachment 1, Volume 6, Rev. 1, Page 75 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS has been designated as more restrictive because it reduces the Completion Time to be in MODE 3.

M03 The CTS 3.1.3.4 Action requires that with the drop time of any CONTROL ROD determined to exceed the limits of the LCO, to restore the rod drop time to within the limit prior to proceeding to MODE 1 or 2. No specific Actions are stated in CTS 3.1.3.4 ifthe unit is in MODE 1 or 2 when the rod drop time is discovered to not be within limits. CTS 3.1.3.1.c provides compensatory actions for when a control rod is inoperable for reasons other than due to being immovable as a result of excessive friction or mechanical interference or know to be untrippable.

CTS 3.1.3.1 Action c allows the plant to operate at a reduced power level as long as other compensatory actions are performed including a requirement to verify SDM. ITS 3.1.4 ACTION D applies with one or more CONTROL RODs inoperable. It requires the verification of SDM to be within limits or to initiate boration to restore SDM to within limit within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months , and requires the unit to be in MODE 3 in 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . This changes the CTS by not allowing the plant to enter CTS 3.1.3.1 Action c under the same conditions in the ITS and includes requirements for SDM and being in MODE 3.

The purpose of requiring a shutdown when a drop time of any CONTROL ROD is not met is to bring the unit to a subcritical condition. With one or more CONTROL RODs slow the assumptions of the accident analyses will not be met.

Therefore it is necessary to place the plant outside of the MODE of Applicability for CONTROL RODs. With one or more CONTROL RODs slow there is a potential to reduce SDM. Therefore, SDM must be evaluated. One hour allows the operator adequate time to determine SDM. Restoration of the required SDM, if necessary, requires increasing the RCS boron concentration to provide negative reactivity. The required Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months for initiating boration is reasonable, based on the time required for potential xenon redistribution in the reactor core, the low probability of an accident occurring, and the steps required to complete the action. This allows the operator sufficient time to align the required valves and start the boric acid pumps. Boration will continue until the required SDM is restored. In addition, the time to reach MODE 3 is consistent with the time provided in other Specifications. This change is acceptable because it is consistent with the requirements of the assumptions of the safety analyses that the drop time of all CONTROL RODs must be within limit and SDM must be met. The change has been designated as more restrictive because it does not allow the plant to continue to operate in MODES 1 and 2 under the same conditions.

M04 CTS 4.1.3.1.2 requires each control rod not fully inserted to be moved at least 2% in any one direction every 92 days. ITS SR 3.1.4.2 requires the same verification every 92 days, except a 3% rod movement acceptance criterion is provided. This changes the CTS by requiring each control rod not fully inserted to be moved 3% in any direction in lieu of the current 2% requirement.

The purpose of CTS 4.1.3.1.2 is to ensure that each control rod not fully inserted is capable of tripping. The proposed 3% acceptance criterion is acceptable because it will provide more positive indication that each control rod not fully inserted is capable of tripping by requiring the control rods to be moved further to verify their freedom of movement. The change has been designated as more Davis-Besse Page 3 of 10 Attachment 1, Volume 6, Rev. 1, Page 75 of 307

Attachment 1, Volume 6, Rev. 1, Page 76 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS restrictive because the ITS requires a more stringent acceptance criterion than is currently required by the CTS.

RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES LA01 (Type 1 - Removing Details of System Design and System Description, Including Design Limits) CTS 3.1.3.1 Action a applies when one or more control rods are inoperable "due to being immovable as a result of excessive friction or mechanical interference or known to be untrippable." ITS 3.1.4 Condition D applies when one or more CONTROL RODs are inoperable. ITS 3.1.4 Condition D does not list the ways in which the rods can be inoperable (i.e., "due to being immovable as a result of excessive friction or mechanical interferences or known to be untrippable"). This changes the CTS by moving the details of the reason the rod is considered inoperable to the Bases:

The removal of these details, which are related to system design, from the Technical Specifications is acceptable because this type of information is not necessary to be included in the Technical Specifications to provide adequate protection of public health and safety. While the ITS Bases will not include the specific words being removed from the CTS, the words used in the ITS Bases,

"(i.e., untrippable)" is synonymous to the removed CTS words, and provides clarity. The ITS still retains the requirement for the CONTROL RODs to be OPERABLE and provides a Condition for when one or more CONTROL RODs are inoperable. Also, this change is acceptable because the removed information will be adequately controlled in the ITS Bases. Changes to the Bases are controlled by the Technical Specification Bases Control Program described in Chapter 5. This program provides for the evaluation of changes to ensure the Bases are properly controlled. This change is designated as a less restrictive removal of detail change because information relating to system design is being removed from the Technical Specifications.

LA02 (Type 1 - Removing Details of System Design and System Description, Including Design Limits) CTS 3.1.3.1 Action c.2.a) requires an analysis of the potential ejected rod worth to be determined to be 5 1.0% Ak at zero power and

-<0.65%Ak at RATED THERMAL POWER for the remainder of the cycle.

ITS 3.1.4 Required Action A.4 requires the verification that the potential ejected rod worth is within the assumptions of the rod ejection analysis. This changes the CTS by moving the potential ejected rod worth limits (-51.0% Ak at zero power and - 0.65%Ak at RATED THERMAL POWER for the remainder of the cycle) to the Bases.

The removal of these details, which are related to system design, from the Technical Specifications is acceptable because this type of information is not necessary to be included in the Technical Specifications to provide adequate protection of public health and safety. The ITS still retains the requirement to Davis-Besse Page 4 of 10 Attachment 1, Volume 6, Rev. 1, Page 76 of 307

Attachment 1, Volume 6, Rev. 1, Page 77 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS verify the potential ejected rod worth is within the assumptions of the rod ejection analysis. Also, this change is acceptable because the removed information will be adequately controlled in the ITS Bases. Changes to the Bases are controlled by the Technical Specification Bases Control Program described in Chapter 5.

This program provides for the evaluation of changes to ensure the Bases are properly controlled. This change is designated as a less restrictive removal of detail change because information relating to system design is being removed from the Technical Specifications.

LESS RESTRICTIVE CHANGES L01 (Category4- Relaxation of Required Action) CTS 3.1.3.1 Actions a and c.2 require satisfying the SHUTDOWN MARGIN requirement in accordance with Specification 3.1.1.1. Under the same conditions in the ITS, ITS 3.1.4 ACTION A and ACTION D require verification that the SHUTDOWN MARGIN is within limits or initiating boration to restore SDM to within limits. This changes the CTS by providing the option to initiate action to establish compliance with the SDM requirement within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months instead of declaring the Required Action not met and following ITS LCO 3.0.3.

The purpose of CTS 3.1.3.1 Actions a and c.2 is to ensure that adequate SHUTDOWN MARGIN exists. Following misalignment of a CONTROL ROD or if a CONTROL ROD is inoperable, boration may be required to reestablish compliance with the SHUTDOWN MARGIN requirements. This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the operability status of the redundant systems of required features, the capacity and capability of remaining features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the repair period. Providing a short period of time to reestablish the SHUTDOWN MARGIN requirement instead of entering ITS LCO 3.0.3 is justified because of the existing conservatisms in the SHUTDOWN MARGIN calculations and the fact that the rod may still be trippable. This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

L02 (Category4- Relaxation of Required Action) CTS 3.1.3.1 Action a specifies requirements for one or more control rods inoperable due -to being immovable as a result of excessive friction or mechanical interference or known to be untrippable. CTS 3.1.3.1 Action b specifies requirements for more than one control rod inoperable or misaligned from its group average height by more than the allowed rod misalignment. CTS 3.1.3.1 Action c specifies requirements for one control rod inoperable due to causes other than those addressed by Action a, above, or misaligned from its group average height by more than the allowed rod misalignment. CTS 3.1.3.1 Action c.2 requires the affected rod to also be declared inoperable. ITS 3.1.4 ACTION D specifies requirements for one or more CONTROL RODs inoperable. ITS 3.1.4 ACTION A specifies requirements for one CONTROL ROD not within alignment limits. ITS 3.1.4 ACTION C Davis-Besse Page 5 of 10 Attachment 1, Volume 6, Rev. 1, Page 77 of 307

Attachment 1, Volume 6, Rev. 1, Page 78 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS specifies requirements for more than one CONTROL ROD not within alignment limits. This changes the CTS by considering CONTROL RODs that are trippable but misaligned to be OPERABLE and excludes other types of control rod inoperabilities not addressed in CTS 3/4.1.3.4 (e.g., drop times). The requirement to declare a misaligned rod inoperable in CTS 3.1.3.1, Action c.2, is deleted. The requirements for control rod drop times are addressed in DOC M03.

The purpose of ITS 3.1.4 is to ensure that the CONTROL RODs are capable of performing their safety function of inserting into the core when required. A secondary function of the CONTROL RODs is to maintain alignment so that the reactor core power distribution is consistent with the safety analyses. This change is acceptable because the LCO requirements continue to ensure that the structures, systems, and components are maintained consistent with the safety analyses and licensing basis. In the ITS, CONTROL ROD OPERABILITY is related only to trippability, and a misaligned rod is not considered inoperable if it can be tripped. Misalignment is addressed by the ITS 3.1.4 LCO, but is separate from OPERABILITY. In both cases, trippability and misalignment, the ITS continues to provide appropriate compensatory measures. This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

L03 (Category4 - Relaxation of Required Action) When one control rod is misaligned CTS 3.1.3.1 Action c.2.c) requires a power distribution map to be obtained from the incore detectors and FQ and FNAH verified to be within their limits within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months . ITS 3.1.4 Required Action A.6 includes the same requirement however it is only required to be performed when THERMAL POWER is > 20% RTP. This changes the CTS by only requiring the Required Action to be performed when THERMAL POWER is > 20% RTP.

The purpose of CTS 3.1.3.1 Action c.2.c) is to ensure that excessive local LHRs will not occur due to CONTROL ROD misalignment. This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the operability. status of the redundant systems of required features, the capacity and capability of remaining features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the repair period. The addition of the Note is acceptable because at low power levels the reactor has insufficient stored energy in the fuel or energy being transferred to the coolant to require a limit on the distribution of core power. This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

L04 (Category 3- Relaxation of Completion Time) CTS 3.1.3.1 Action c.2.d states that with one rod misaligned, reduce the THERMAL POWER level to _ 60% of the THERMAL POWER allowable within one hour and within the next 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months to reduce the High Flux Trip Setpoint to - 70% of the THERMAL POWER allowable for the reactor coolant pump combination. ITS 3.1.4 ACTION A requires Davis-Besse Page 6 of 10 Attachment 1, Volume 6, Rev. 1, Page 78 of 307

Attachment 1, Volume 6, Rev. 1, Page 79 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS THERMAL POWER to be reduced to -60% of ALLOWABLE THERMAL POWER within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and to reduce the High Flux trip setpoint to -<70% of the ALLOWABLE THERMAL POWER within 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months . This changes the CTS by changing the Completion Times to reduce THERMAL POWER and the high flux trip setpoint from 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and from 5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months (1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months plus 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months ) to 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months , respectively.

The purpose of CTS 3.1.3.1 Action c.2.d is to reduce THERMAL POWER to help ensure that local LHR increases, due to a misaligned rod, will not cause the core design criteria to be exceeded. The purpose of the reduction of the high flux trip setpoint is to maintain both core protection and an operating margin at reduced power similar to that at RTP. This change is acceptable because the Completion Time is consistent with safe operation under the specified Condition, the capacity and capability of remaining features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the allowed Completion Time. The Completion Time of 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months gives the operator sufficient time to accomplish an orderly power reduction without challenging the Reactor Trip System. The Completion Time of 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months allows the operator 8 additional hours after completion of the THERMAL POWER reduction to adjust the trip setpoint. This change is designated as less restrictive because additional time is allowed to restore parameters to within the LCO limits than was allowed in the CTS.

L05 (Category 7- Relaxation Of Surveillance Frequency, Non-24 Month Type Change) CTS 4.1.3.1.1 requires the position of each control rod to be determined to be within the group demand limit by verifying the individual rod positions at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months except during time intervals when the asymmetric rod monitor is inoperable. In this situation the position of each CONTORL ROD is monitored at least once per 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . ITS SR 3.1.4.1 requires verification that the individual CONTROL ROD positions are within the alignment limits every 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . This changes the CTS by eliminating the requirement to verify the individual CONTROL ROD positions to be within alignment limits every 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months when the asymmetric rod monitor is inoperable.

The purpose of CTS 4.1.3.1.1 is to periodically verify that the rods are within the alignment limits specified in the LCO. This change is acceptable because increasing the Frequency of rod position verification when the asymmetric rod monitor is inoperable is unnecessary. An inoperability of the monitor does not increase the probability that the rods are misaligned. The routine 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Frequency (ITS SR 3.1.4.1) continues to ensure the control rods are aligned properly. Furthermore, the asymmetric rod monitor is for indication only. Its use is not credited in any safety analyses. Thus, any response determined necessary by plant personnel due to an inoperable alarm is more appropriately controlled by plant procedures, not Technical Specifications. This change is designated as less restrictive because Surveillances will be performed less frequently under the ITS than under the CTS.

L06 (Category 5- Deletion of Surveillance Requirement) CTS 4.1.3.4.b requires the rod drop time of CONTROL RODs to be demonstrated through measurement prior to reactor criticality for specifically affected individual rods following any maintenance on or modification to the control rod drive system which could affect Davis-Besse Page 7 of 10 Attachment 1, Volume 6, Rev. 1, Page 79 of 307

Attachment 1, Volume 6, Rev. 1, Page 80 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS the drop time of those specific rods. The ITS does not include this testing requirement.

The purpose of CTS 4.1.3.4.b is to verify OPERABILITY of the CONTROL RODs following maintenance that could alter their operation. This change is acceptable because the deleted Surveillance Requirement is not necessary to verify that the equipment used to meet the LCO can perform its required functions. Thus, appropriate equipment continues to be tested in a manner and at a Frequency necessary to give confidence that the equipment can perform its assumed safety function. Any time the OPERABILITY of a system or component has been affected by repair, maintenance, modification, or replacement of a component, post-maintenance testing is required to demonstrate the OPERABILITY of the system or component. This is described in the Bases for ITS'SR 3.0.1 and required under ITS SR 3.0.1. The OPERABILITY requirements for the rod control system are described in the Bases for ITS 3.1.4. In addition, the requirements of 10 CFR 50, Appendix B, Section XI (Test Control) provide adequate controls for test programs to ensure that testing incorporates applicable acceptance criteria. Compliance with 10 CFR 50, Appendix B, is required under the unit operating license. As a result, post-maintenance testing will continue to be performed and an explicit requirement in the Technical Specifications is not necessary. This change is designated as less restrictive because Surveillances which are required in the CTS will not be required in the ITS.

L07 (Category 5- Deletion of Surveillance Requirement) CTS 4.1.3.4 requires the rod drop time of safety and regulating rods to be demonstrated through measurement prior to reactor criticality following each removal of the reactor vessel head and at least once per REFUELING INTERVAL (24 months). ITS SR 3.1.4.3 requires the test to be performed prior to criticality after each removal of the reactor head. This changes the CTS by deleting the Surveillance Requirement.

The purpose of CTS 4.1.3.4 is to ensure the safety and regulating rods insert within the rod drop criteria. This change is acceptable because the deleted Surveillance Requirement is not necessary to verify that the equipment used to meet the LCO can perform its required functions. Thus, appropriate equipment continues to be tested in a manner and at a Frequency necessary to give confidence that the equipment can perform its assumed safety function. The requirements in the CTS to perform the test following each removal of the reactor vessel head and at least once per 24 months normally coincide with one another.

The head is removed once each cycle (approximately once every 24 months) unless there is a need to remove the head prior to the end of the cycle. This change is designated as less restrictive because Surveillances which are required in the CTS will not be required in the ITS.

L08 (Category 5- Deletion of Surveillance Requirement) CTS 4.1.1.1.1 .a requires verification of SHUTDOWN MARGIN within one hour after detection of inoperable control rod(s) and at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod(s) are inoperable. These requirements are applicable in MODES 1, 2, 3, 4, and 5. ITS 3.1.4 Required Action D.1.1 requires the verification of SDM to be within limits within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . These verifications are required in MODES 1 and 2 with one or more control rod(s) inoperable. This changes the CTS by not Davis-Besse Page 8 of 10 Attachment 1, Volume 6, Rev. 1, Page 80 of 307

Attachment 1, Volume 6, Rev. 1, Page 81 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS requiring any explicit SDM verifications for inoperable control rod(s) in MODES 3, 4, and 5 other than the normal verifications specified in ITS SR 3.1.1.1 (once every 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ). For MODE 1 and 2 operations, this changes the CTS by not requiring the verification of SDM on a once per 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months basis for one or more inoperable rod(s).

The purpose of CTS 4.1.1.1.1.a is to provide the appropriate compensatory measures to determine SDM when control rod(s) are inoperable during operations in MODES 1, 2, 3, 4, and 5. The purpose of the ITS 3.1.4 ACTIONS are to provide the appropriate compensatory actions for inoperable control rods in MODES 1 and 2. The purpose of ITS SR 3.1.1.1 is to provide the normal Frequency for verification of SDM regardless of the status of the control rod(s).

When the plant is operating in MODES 1 and 2, with one or more rod(s) inoperable the unit must be in MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . After reaching MODE 3, ITS 3.1.4 no longer applies therefore it is inappropriate to specify additional actions after the unit is outside the Applicability of the Specification.

Nevertheless, SDM must still be verified in accordance with ITS SR 3.1.1.1 every 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . This SDM verification must also compensate for the reactivity worth of the control rod that is not fully inserted since it is required by the definition of SDM. Therefore, ITS 3.1.4 ACTIONS provide the appropriate compensatory measures. In MODES 3, 4, and 5, SDM will be monitored in accordance with ITS SR 3.1.1.1 every 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . This change is acceptable since SDM will still be required to be monitored every 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , and based on the definition of SDM the reactivity worth of any rod not capable of being fully inserted must be accounted for in the determination of SDM. Thus, SDM continues to be monitored in a manner and at a Frequency necessary to give confidence that the assumptions in the safety analyses are protected. This change is designated as less restrictive because Surveillances which are required in the CTS will not be required in the ITS.

L09 (Category4 - Relaxation of Required Action) CTS 3.1.3.4 Action a requires that with the drop time of any control rod determined to exceed the limits of the LCO, to restore the rod drop time to within the above limit prior to proceeding to MODE 1 or 2. ITS 3.1.4 does not have a similar requirement, however ITS LCO 3.0.4 states "When an LCO is not met, entry into a MODE or other specified condition in the Applicability shall only be made after performance of a risk assessment addressing inoperable systems and components, consideration of the results, determination of the acceptability of entering the MODE or other specified condition in the Applicability, and establishment of risk management actions, if appropriate; exceptions to this Specification are stated in the individual Specifications." This changes the CTS by providing an allowance for entry into a, MODE or other specified condition in the Applicability when the drop time of any control rod is not met.

The purpose of CTS 3.1.3.4 Action a is to not allow entry into the Applicability of the Specification if the drop time of any control rod is not within limits. ITS LCO 3.0.4 provides guidance when an LCO is not met and entry into a MODE or other specified condition in the Applicability is desired. The change is acceptable because ITS LCO 3.0.4 provides the appropriate guidance to enter the Applicability when an LCO is not met. ITS LCO 3.0.4 establishes limitations on

changes in MODES or other specified conditions in the Applicability when an Davis-Besse Page 9 of 10 Attachment 1, Volume 6, Rev. 1, Page 81 of 307

Attachment 1, Volume 6, Rev. 1, Page 82 of 307 DISCUSSION OF CHANGES ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS LCO is not met. It allows placing the unit in a MODE or other specified condition stated in that Applicability (e.g., the Applicability desired to be entered) when unit conditions are such that the requirements of the LCO would not be met. ITS LCO 3.0.4.b allows entry into a MODE or other specified condition in the Applicability with the LCO not met after performance of a risk assessment addressing inoperable systems and components, consideration of the results, determination of the acceptability of entering the MODE or other specified condition in the Applicability, and establishment of risk management actions, if appropriate. The risk assessment may use quantitative, qualitative, or blended approaches, and the risk assessment will be conducted using the plant program, procedures, and criteria in place to implement 10 CFR 50.65(a)(4), which requires that risk impacts of maintenance activities to be assessed and managed. The risk assessment, for the purposes of ITS LCO 3.0.4.b, must take into account all inoperable Technical Specification equipment regardless of whether the equipment is included in the normal 10 CFR 50.65(a)(4) risk assessment scope. The risk assessments will be conducted using the procedures and guidance endorsed by Regulatory Guide 1.182, "Assessing and Managing Risk Before Maintenance Activities at Nuclear Power Plants."

Regulatory Guide 1.182 endorses the guidance in Section 11 of NUMARC 93-01, "Industry Guideline for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants." These documents address general guidance for conduct of the risk assessment, quantitative and qualitative guidelines for establishing risk management actions, and example risk management actions. These include actions to plan and conduct other activities in a manner that controls overall risk, increased risk awareness by shift and management personnel, actions to reduce the duration of the condition, actions to minimize the magnitude of risk increases (establishment of backup success paths or compensatory measures), and determination that the proposed MODE change is acceptable. Consideration should also be given to the probability of completing restoration such that the requirements of the LCO would be met prior to the expiration of ACTIONS Completion Times that would require exiting the Applicability. ITS 3.1.4 ACTION D requires the verification that SDM is within limit or to initiate boration to restore SDM to within limit in one hour and to be in MODE 3 in 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

Therefore, entry will only be made if the drop time of the inoperable control rod can be restored within a short time period of time and the SDM requirements are met. This change is designated as less restrictive because entry into MODES or other specified conditions in the Applicability of a Specification might be made with an LCO not met as long as the plant is in compliance with ITS LCO 3.0.4.

Davis-Besse Page 10 of 10 Attachment 1, Volume 6, Rev. 1, Page 82 of 307

Attachment 1, Volume 6, Rev. 1, Page 83 of 307 Improved Standard Technical Specifications (ISTS) Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 83 of 307

Attachment 1, Volume 6, Rev. 1, Page 84 of 307 CONTROL ROD Group Alignment Limits 3.1.4 CTS 3.1 REACTIVITYCONTROL SYSTEMS 3.1 A. CONTROL ROD GroupAlignment Limits 3.1.3.1 LCO 3.1.4 Each CONTROL ROD shall be OPERABLE.

.AN i Each CONTROL ROD shall be aligned to within M6.54/o of its group average height.

0 APPLICABILITY: MODES 1and 2.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME 3.1.3.1 Action c A. One CONTROL ROD A.1 R store CONT OL ROD 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 0 not aligned to within afignment.

6.5r/ of its group average height. OR A.R]1.1 Verify SDM is within e im. sl cifie /n teL_/

1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 0

Ag]1.2 Initiate boration to restore 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 0)

SDM to within limit.

0 A.g]2 Reduce THERMAL 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months POWER'to < 60% of the ALLOWABLE THERMAL POWER.

AND 0 BVVOG STS 3.1.4-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 84 of 307

Attachment 1, Volume 6, Rev. 1, Page 85 of 307

-CONTROL ROD Group Alignment Limits 3.1.4

. CTS ACTIONS (continued)

CON DITION REQUIRED ACTION COMPLETION TIME

+ -4 Flux 3.1.3.1 Action c AfU3 Reduce the u ar Ioverperitrip setpoint to 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months 00

_.70% of the ALLOWABLE THERMAL POWER.

AND Once per 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months s6 (6 5 A.4 Verify SDM is within limit.

A.] Verify the potential ejected rod worth is within the 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months 0

assumptions of the rod ejection analysis.

AND A .j- ------- NOTE--------

Only required when 0 THERMAL POWER is

> 20% RTP.

Perform SR 3.2.5.1. 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months DOC M02 B. Required Action and B.1 Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months associated Completion of Time met.

Condition A not 0 3.1.3.1 C. More than one C.1.1 Verify SDM is within["]e lris P/ecifiedn theJ 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 0 Action b CONTROL ROD not aligned within [6.5q% of 0 its group average height.

OR C.i .2 Initiate boration to restore 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months S.DM to within limit.

AND C.2 Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months BVWOG STS 3.1.4-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 85 of 307

Attachment 1, Volume 6, Rev. 1, Page 86 of 307 CONTROL ROD Group Alignment Limits 3.1.4 CTS ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME 3.1.3.1 Action a, D. D.1 .1 Verify SDM is within Wt.

i S.s.ecified/ln the]7 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 00 4.1.1,1,1,a inoperable.

OR D.1.2 Initiate.boration to restore 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months SDM.to within limit.

AND D.2 Be. in MODE 3. :6 hours SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY 4.1.3.1.1 SR 3.1.4.1 Verify individual CONTROL ROD positions are 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months within [.5r/o of their group average height.

i 0

4.1.3.1.2 SR 3.1.4.2 Verify CONTROL ROD freedom of movement 92 days (trippability) by moving each individual CONTROL ROD that is not fully inserted _>3% in anydirection, 4.1.3.4, SR 3.1.4.3 -----------------------

NOTE ----------------

3.1.3,4, With rod drop times determined with less than four 3.1.314 Action b reactor coolant pumps operating, operation may proceed provided operation is restricted to the pump combination operating during the rod drop time determination.

1.58 cane Verify the rod drop time for each CONTROL ROD, Prior to reactor from the fully withdrawn position, is:* [1. 6] seconds criticality after 0 from power interruption at the CONTROL ROD drive bre ~ers to 3/4 insertion (25% withdrawn .position) each removal of the reactor vessel 0 with Tavg --525°F. head BVWOG STS 3.1.4-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 86 of 307

Attachment 1, Volume 6, Rev. 1, Page 87 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS

1. The brackets have been removed and the proper plant specific information/value has been provided.

2. ISTS 3.1.4 Required Action A.1 requires restoration of a CONTROL ROD not within alignment limits within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months or performance of a number of other actions, such as verification of SHUTDOWN MARGIN, reduction in reactor power, measurement of hot channel factors, and re-evaluation of the safety analyses. The Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 4.1.6.g, states "A Required Action which requires restoration, such that the Condition is no longer met, is considered superfluous. It is only included if it would be the only Required Action for the Condition or it is needed for presentation clarity." Neither exception applies in this case. In fact, the inclusion of Required Action A.1 requires an additional level of indenting and numbering for the remaining Required Actions in Condition A, which reduces its clarity. Therefore, Required Action A.1 is deleted and the subsequent Required Actions renumbered.

3. Changes are made to be consistent with the format of the ITS. The location of where a parameter's limits reside, whether in the COLR or an actual LCO statement, is not normally specified in the Required Action. The Required Action normally states that the parameter shall be "within limits."

4. Changes are made to be consistent with the LCO.

5. Typographical error corrected.

6. The second Completion Time of ISTS 3.1.4 Required Action A.2.1.1. (ITS 3.1.4 Required Action A.2.1) has been deleted and a new Required Action A.4 has been added to ITS 3.1.4 ACTION A. The Required Action is to verify SDM is within limits once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . This change is necessary and consistent with CTS 3.1.3.1 Action c.2.b and also consistent with the ISTS for the Westinghouse plants (NUREG-1431, Rev. 3, "Standard Technical ,Specifications-Westinghouse Plants").

7. Changes are made which reflect the plant specific nomenclature.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 87 of 307

Attachment 1, Volume 6, Rev. 1, Page 88 of 307 Improved Standard Technical Specifications (ISTS) Bases Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 88 of 307

Attachment 1, Volume 6, Rev. 1, Page 89 of 307

.CONTROL ROD Group Alignment Limits B 3.1.4 B.3.1 REACTIVITY¥CONTROL SYSTEMS B.3..-4 CONTRoL RODGroup Alignment Limits

BASES, BACKGROUND The OPERABILITY (i-e.,trippa bility) o.f the CONTROL RODS (safety rods.

and regulating rods). is an iriitialcondition assumption inall safety

.analyses that assume rod insertion upon reactor trip. Maximum rod misalignment is an initial condition assumption in the safety analysis that directly affects core power distributions and assumptions of.available

SDM.

.* UFSARý Appendices 3D.1.6, 3D.1.21, 3D.1.22, 3D.1.23, and 3D.1.24 The applcbecierafrtedesg

& eure-ments are 1CF50 E Appendix~d," GDC 1.0,

,^.,,- , "Reactor

,, Desi~gn,

. and GDC 2A6, "Reactivity Controll System Redundancy-andC~pabilityy (Ref. 1), and 10 CFR ý50.46, "Acceptance Criteria for. Emergency Core Cooling Systems for Light Water Nuclear Power Plants" .(Ref. 2).

Mechanical orelectricalfailures, may cause a CONTROL ROD to become inoperable or to become misaligned from its group. CONTROL ROD inoperability or misalignment may cause increased power peaking, due to the asymmetric reactivity distribution anda reduction in the total available rod worth for reactor shutdown, Therefore, CONTROL ROD alignment and OPERABILITYare related to core operation within design power peaking limitsand the core design requirement of a minimum SDM.

Limits on CONTROL ROD alignment and OPERABILITY have been established, and all rod positions are monitored and controlled during power operation to ensure that the power distribution and reactivity limits defined by the design power peaking and SDM limits are preserved.

CONTROL RODS are moved by their CONTROL ROD drive mechanisms

ý(CRDMs). Each CRDM moves its rod % inch for one revolution of the Q leadscrew, but at varying rates depending on, the signal output from the Control Rod Drive Control System (CRDCS). roller nut assemblyaround the The CONTROL RODS are arranged into rod groups that are radially symmetric. Therefore, movement of the CONTROL RODS does not introduce radial, asymmetries in the core power distribution. The safety rods and the regulating: rods provide required reactivity worth for immediate reactor shutdown upon a reactor trip. The regulating rods provide reactivity (power level) control during normal operation and transients, and their movement is normally governed by theu control system. 0 in nautomatic BWVOG STS B 3.1.4-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 89 of 307

Attachment 1, Volume 6, Rev. 1, Page 90 of 307

CONTROL ROD Group Alignment. Limits B 311.4 BASES BACKG1RQOUND. (continued),

The Faall position of safety rods iand regulating rods is indicated by two separate and independent systems, which are the, relative position indicator rans cer and the absoltjte. position indicator jtran rucers (see LCO 3.1.7, "Position Indicator Chaqnneis")., potentiometer The relative position indicator trans'ce is a potentiomettethat is driven by electrical pulses. from the CRDCS. There is onecu ter foreach.

CONTROL ROD drive. Individual rods in a group all receive the same 0

signal to move; therefore, the counters for all rods inma group should indicate the same pOsition. The: Relative Position Indicator System is.

rotor rotation results in considered hihly .precise (one rotatin of the. adscrew is-34 inch in rod motion). If a rod does not move for eachldemand pulse, the rwill

stilr-the pulse and incorrectly reflect the position of'the rod.

I potentiometer]

The Absolute Position Indicator System provides a highly accurate.

indication of actual CONTROL ROD position, but ata lower precision than relative positiOn indicators. This system isbased on inductive.

analog signals fromra series of reed switches spaced along a tube with a center to ;center distance of' Linches.L 0 APPLICABLE SAFETY CONTROL ROD misalignmentlahd in~pera~ility accidents'are analyzedin the safety analysis (Ref. 3). The .acceptance criteria for addressing 0

ANALYSES CONTROL RODj in!pe bili orimsalignment~areff-:

a. 'here sha. be no'violat ns:of: 4THERMAL POWER shall not exceed 110.2% of 2817 MWT in- i H V In.LA~IJd I W U I.~I Ili I~~~ 2~)

Reactor CoolantSystem (RCS):pressurejbo~ndary\dama and F shall -notexceed code pressure lmt *L ib. Ih6 ,ore must remal.subcritical 'ater actent transients.

Teetypesof misalignment are distinguished. During movement of a CONTROL ROD group, one rod may stop moving,whilethe. other rods in the group continue. This condition may cause excessive power peaking.

The sec nd type of misalignr ent occurs if one rod fai to insert: upon a reactor t and remains stuckfully withdrawn This coh dition requires an evaluatio to determine that su icient reactivity worth isoeld, in the 0 CONTROL RODS :to meet the DM requirement with the\maximum worth rod stuck fu y withdrawn. If a C NTROL ROD is stuck in the fully BVWOG STS B 3.1.4-2 Rev. 3.0, 03/311/04 Attachment 1, Volume 6, Rev. 1, Page 90 of 307

Attachment 1, Volume 6, Rev. 1, Page 91 of 307 CONTROL ROD Group Alignment Limits B 3.I.4, BASES APPLICABLE SAFETY ANALYSES, (continued):

.withdravyh position, its worth is accounteid for'in the calc. lation of"SDW

since t e safety analysis dopesnot tak wo stuck rods nto, account. Te 0)

Stype of misalignment occurswhen one -od drops partially.or fully into

'the reactor core. This eventcauses an initial power reduction followed by.

a return towards the original power due to positive reactivity'feddback from the negative moderator temperature coefficient. Increased peaking during the power increase. may, result in excessive local linear heat rates (LH Rs).

The ac ident analysisand r load 'safety evaluations, efine, regulating. rod insertio limits that ensure th required'SDM can al ys be achieved if the ma 'mum worth CONTR L ROD is stuck fully wit drawn (Ref. 4). If a CONTR L ROD is stuck in o dropped in, continued o eration is permitte if the increase in lo al. LHR is with in the desi n limits. The Require Action statements, i the LCOs provide cons' rvative reductions in THER AL POWER and ve ification of SDM to ensu e continued operatio remains within the b unds of the safety anal is (Ref. 5).

Continue operation of the rea tor witha misaligned or' ropped CONTRO ROD is allowed if t e FQ(Z) and the F,, are verified to be within thei limits in the COLR. When a CONTROL RO is misalignedi the assum tions that are used determine the regulatin rod insertion limits, APý R insertion limits,' AL POWER IMBALANC limits, and QPT limits re not preserved. erefore, the limits may ot preserve. the design pea ing factors, and FQ( )and F H must be verifi d directly by incore map ing. Bases Section .2, Power Distribution Li its, contains a.

more compl te discussion of the elation of FQ(Z) and F% to the Ioperating li its.

The CONTROL ROD group alignment limits and OPERABILITY' INSET1 requirements satisfy Criterion :2 of .10 CFR .50.36(c6(2)(ii).

LCO The limits on CONTROL ROD group alignment, safety rod insertion,and APSR alignment, together with the limits on regulating ro.d insertion, APSR insertion, AXIAL POWER IMBALANCE, andQPT,ensure the.

reactor will operate within.the fuel design criteria. The Required Actions in these LCOs ensure that deviations from the alignment limits will either be corrected or that THERMAL POWER will be adjusted,. so. that excessive local LHRs will not occur and the. requirements on"SDM and ejected rod worth are preserved.

BWOG STS B 3.1.4-3 Rev. 3.0, 03/31/104 Attachment 1, Volume 6, Rev. 1, Page 91 of 307

Attachment 1, Volume 6, Rev. 1, Page 92 of 307 B 3.1.4 0 INSERT 1 The CONTROL ROD OPERABILITY requirement is satisfied provided the rod will insert within the required rod drop time assumed in the safety analysis (Ref. 4).

Insert Page B 3.1.4-3 Attachment 1, Volume 6, Rev. 1, Page 92 of 307

Attachment 1, Volume 6, Rev. 1, Page 93 of 307 CONTROL ROD Group:Alignment Limits

.B ý3.1.4 BASES LCO (co~ntinued)

The requirements ;on rod OPERABILITY ensure that upon reactor trip,, the assumed reactivity will be available and will be inserted. The.rod OPERABILITY requirements (i.e., trippability) are separate from theý

,alignment requirements'. The rod OPERABILITY requirement issatisfied provided the'rod will*F]~j insert in the required rod drop time assumed in 0 the safetyanalysis. Rod control malfunctions that result in the inability to.

.move a rod I(e.g., rod rift oil failures), but that do not impact trippability, 0 do not result in rod inoperability.

The limit for individual CONTROL ROD misaignmentis,:p/o (9 inches) 0 deviation from the group average position. This value, is established, based on .the distance between reed switches, with additional allowances for uncertainty in the absolute position indicatoramplifiers, gr u 0 Imaximum or rtrarnum syn esi.er, and asymmetric alarm or fault d The position of aln ino raberod is not included in:the 0 calculationof the rod group average position.

Smisaligned Failure to meet the requirements of this LCO may produce unacceptable power peaking factors and LHRs, or unacceptable SDM or ejected rod worth, all ofwhich may constitute initial conditions inconsistent with the

,safety analysis..

APPLICABILITY The requirements on CONTROL ROD OPERABILITY and alignment are applicable in MODES 1 and 2 because these are the only MODES in which neutron (or fission) power is generated, and the OPERABILITY (i.e., trippability): and alignment of rods have the potential.to affect the

,safety of the plant. In MODES 3, 4, 5, and 6, the alignment limits do not apply because the CONTROL RODSare typically, bottomed, and the, reactoris shut down and not producing fission power. In the shutdown MODES, the OPERABILITY of the safety and regulating rods has the potential to affect the required SDM, but this effect can be compensated for by an. increase in the boron concentration of the RCS. See LCO 8.1.1 "SHUTDOWN MARGIN (SDM)," for SDM in MODES 3, 4, and 5, and LCO 3.9.1, "Boron Concentration," for boron concentration requirements during refueling.

ACTIONS A.1 Alignme t of the misaligned ONTROL ROD may be accomplished by either mo ing the single CON ROL ROD to the group average position,

.or by movi g the remainder of e group to the position of the single 0

misaligned. ONTROL ROD. E her action can be used to restore the BWOG STS B 3.1.4-4 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 93 of 307

Attachment 1, Volume 6, Rev. 1, Page 94 of 307 CONTROL ROD Group Alignment Limits B 3.1.4 BASES ACTIONS (continued)

CONTIOL RODS to a radial, symmetric pattern. Ho ever, this must be, done wi out violating the C TROL ROD group sequ nce, overlap, and insertion limits of LCO 3.2A1, egulating Rod Insertion imits,",given in the COLI. THERMAL POWE must also be restricted, as necessary, to 0 the value Ilowed by the inserti n limits of LCO 3.2.1. T e required Completio Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months is a ceptable because local x non redistributi n during this short in erval will not cause a sig ificant increase in LHR. This option is not availat le if a safety rod is misal gned, since the limits of LC 3.1.5, 'Safety Rod I sertion Limits," ýwould b violated.

0 A[1.1 6 1ompliance with Required Actions:AMJ1.1 through A* iaJws for Restoration of the CONTROL continued power operation with one CONTROL ROD misaligned from its ROD is allowed, however group average position, IThes"Required Actionscomprni the final lalt fnate fr Condi on A.]

Since the rod may~be inserted farther than the group average insertion for a long time, SDM must be evaluated. Ensuring the SDM meets the minimum requirement within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months is adequate to determine that further degradation of the SDM is not occurring.

AM1.2 0

Restoration of the required SDM requires increasing the RCS boron concentration, since the CONTROL ROD may remain misaligned and not be providing its normal negative reactivityon tripping. RCS boration must occur as described in Bases Section 3.1.1. The required Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months to initiate boration is reasonable, based on the time required for potential xenon redistribution, the low probability of an accident occurring, and the steps required to complete the action. This allows the operator sufficient time for aligning the required valves and starting the boric acid pumps. Boration will continue until the required SDM is restored.

BWOG STS B 3.1.4-5 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 94 of 307

Attachment 1, Volume 6, Rev. 1, Page 95 of 307 B 3.1.4 O INSERT 2 0

When a CONTROL ROD is misaligned, re-alignment of the CONTROL ROD may be accomplished by either moving the single CONTROL ROD to the group average position, or by moving the remainder of the group to the position of the single misaligned CONTROL ROD. Either action can be used to restore the CONTROL RODS to a radially symmetric pattern. However, this must be done without violating the CONTROL ROD group sequence, overlap, and insertion limits of LCO 3.2.1, "Regulating' Rod Insertion Limits." THERMAL POWER must also be restricted, as necessary, to the value allowed by the insertion limits of LCO 3.2.1.

Insert Page B 3.1.4-5 Attachment 1, Volume 6, Rev. 1, Page 95 of 307

Attachment 1, Volume 6, Rev. 1, Page 96 of 307 CONTROL ROD Group Alignment Limits B 3.11.4 BASES ACTIONS (continued) 0 Reduction of THERMAL POWER to *60% ALLOWABLE THERMAL POWER ensures that local LHR increases, due to a misaligned rod, will not cause the core design criteria to be exceeded. The. required Completion Time of 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months allows the operator sufficient time for reducing THERMAL POWER.

High Flux Reduction of the nuclearaeerowe trip setpoint to

70% ALLOWABLE 0

THERMAL POWER, after THERMAL POWER has been reduced to 60%

ALLOWABLE THERMAL POWER, maintains both core protection and an operating margin at. reduced power similar to that at RTP. The required Completion Time of 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months allows the operator 8 additional hours after completion of the THERMAL POWER reduction in Required Action Ag2 to adjust the trip setpoint. 0 T 3(5 5 The .existing CONTROL ROD configuration must not cause an ejecte~d rod to exceed the limit of 0.65% Ak/k at RTP or 1.00% Aklk at zero power

r. This evaluation may require a. computer calculation of the maximum ejected rod worth based on nonstandard configurations of the 0

CONTROL ROD groups. The evaluation must determine the ejected rod worth for the remainder of the fuel cycle to. ensure a valid evaluation, should fuel cycle conditions at some later time become more bounding than those at the time of.the rod misalignment. The required Completion Time of 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months is acceptable because LHRs are limited by the THERMAL POWER reduction and sufficient time is provided to perform the required evaluation.

0 Performance of SR 3.2.5.1 provides a determination of the power peaking factors using the Incore Detector System. Verification of the Fc4 and 0 FN from an incore power distribution map is necessary to ensure that excessive local LHRs will not occur due to CONTROL ROD misalignment. This is.necessary because the assumption that all BWOG STS B 3.1.4-6 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 96 of 307

Attachment 1, Volume 6, Rev. 1, Page 97 of 307 B 3.1.4 (O INSERT 3 A.4 When a rod is known to be misaligned, there is a potential to impact the SDM.

Since the core conditions can change with time, periodic verification of SDM is required. A Frequency of 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is sufficient to ensure this requirement continues to be met.

Insert Page B 3.1.4-6 Attachment 1, Volume 6, Rev. 1, Page 97 of 307

Attachment 1, Volume 6, Rev. 1, Page 98 of 307 CONTROL'ROD Grou6pAlignment Limits B 3.1.4 BASES.

ACTIONS (continued)

CONTROL RODS are aligned (used to determine the regulating rod i.nsertion, AXIAL POWER IMBALANCE,Land QPT liimits) is not Valid when the CONTROL RODSare not aligned. The required Completion Time of 72: hours is acceptable because LHRs are limited by the THERMAL POWER reduction and adequate tiredis allowed to obtain an incore power distribution map.

Required Action A.21'i odified bya Note that requires the performance of S.R .3.2.5.1 only when THERMAL POWER is greater than 20% RTP. This establishes a Required Action that is consistent with the Applicability of LCO 3.2.5, "Power Peaking Factors*' ("

B.1 If fd ActionN and associated Completion TimeNwfCondition A 0 cannot be.met, the plant must be brought to a MODE in which the LCO does not apply. To achieve this status.the plant must be brought to at least MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . The allowedCompletion Time. of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is reasonable,.based on operating experience, for reaching MODE 3 from full power conditions in an orderlymanner and without challenging plant systems.

C.i1.1 More than one CONTROL ROD becoming misaligned, is not expected and may violate the minimum SDM requirement. Therefore, SDM must be evaluated.. Ensuring the SDM meets the minimum requirement within 1 hourallows the operator adequate time to determine the. SDM.

C.1.2 Restoration of the required SDM requires increasing the RCS boron concentration to provide negative reactivity. RCS boration must occur as the LCO 3.1.1 described inBases c. The required Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months for initiating boration is reasonable,. based on the time required for potential xenon redistribution, the low probability of an accident occurring, and the steps required to: complete the action. This allows the operator sufficient, time for aligning the required valves and starting the boric acid pumps& Boration will continue until the required SDM .is restored.

BWOG STS B 3.1.4-7 Rev. 3.0,:03/31104 Attachment 1, Volume 6, Rev. 1, Page 98 of 307

Attachment 1, Volume 6, Rev. 1, Page 99 of 307 CONTROL ROD Group Alignment: Limits "B -3.1-4 BASESý ACTIONS (continued)

c.2 If.more than one.CONTROL ROD is. misaligned, continued~operationof

,the reactor may cause the misalignment toi:ncrease, as the regulating:

rods insert or Withdraw to control reactivity. If the CONTROL ROD misalignment increases, local power peaking mayalso increase, and local LH Rs will'also increase if the reactor continues, operation-at THERMAL POWER. The SDM is decreased when.one or more CONTROL RODS become misaligned by.insertion fromthe group average position.

Therefore, it is prudent to place the reactor in MODE 3. LCO 3.1.4 does not apply in MODE 3 since excessive, power peaking cannot occur and the minimum required SDM is ensured. The allowed Completion Time of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is reasonable, based.on. operating experience, for reaching MODE 3 from full power conditions in-an orderly manner and without challenging plant 'systems.

D.1.1 and D.1.2 CONTROL]

RODs When ýone or more[rsare inoperable, the SDM may be adversely affected. Under these conditions, itis important to:.determine~the SDM and, if it is less than the required value, initiate boration until the required SDM is recovered. The Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months is adequate.f0or determining.SDM and, if necessary, for initiating emergency boration to restore SDM.

In this situation, SDM verification must include the worth :of the inoperable rod(s) as well as a rod of maximum worth.

D.2 CONTROL RODs If the inoPerable ro(s cannot be restored to OPERABLE status, the Q plant must be brought to a MODE or condition in which the LCO requirements are: not applicable. To achieve this status, .the plant must be broughtto at least MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

The allowed Completion Time is reasonable, based on operating experience, for reaching MODE 3 from full power conditions in an orderly manner and without challenging plant systems.

BWOG STS B 3.1.4-8 Rev. 3.0, 03/311/04 Attachment 1, Volume 6, Rev. 1, Page 99 of 307

Attachment 1, Volume 6, Rev. 1, Page 100 of 307 CONTROL ROD Group Alignment Limits B 3:1.4 BASES SURVEILLANCE SR 3.1.4.1 REQUIREMENTS Verification that individual rodsiare aligned within[6.:5'/ of their group.

average height limits at a 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Frequency allows the 'oper.tor.to detect a rod that is beginning to deviate from its expected position. The specified Frequency takes into account otherrod position information that is continuously available to the operator in the control rboom, sothat during actual rod motion, deviations can immediately be detected.,

SR 3.1.4.2 Verifying each CONTROL ROD is OPERABLE would require~that each.

rod be tripped. However;, in MODES 1 and 2, tripping each CONTROL ROD .could result in radial tilts. Exercising each individual CONTROL fully insered ROD every 92 days provides increased confidence that all rods continue to be OPERABLE without exceeding the alignment limit, even if they are 0

not regularlytripped. Moving each CONTROL ROD by.3% will not cause radial or axial power tilts, or oscillations, to occur. The 92.day Frequency takes into consideration other information available to the operator in the control room and SR 3.1.4.1., which is performed more .frequently and adds to the determination of OPERABILITY of the rods. Between required performances of SR 3.1.4.2 (determination of CONTROL ROD.

OPERABILITY by movement), if a CONTROL ROD(S) is discovered to be immovable, but is determined.to be trippable, the CONTROL ROD(S) is considered to be OPERABLE. Atanytime, if a CONTROL ROD(S) is immovable, a determination of the trippability (OPERABILITY) of the CONTROL ROD(S) must be made, and appropriate action taken.

SR 3.1.4.3 Verificationof rod drop time allows the operator to determine thatthe maximum roddrop time permitted is. consistent with the assumed rod drop time used inthe safety analysis. The rod drop time given in the safety analysis is1.4 seconds t6- insertion. Using the identical rod drop curve gives a value 6]secondsto ' insertion. The latter value is used in the Surveillance because the zone reference lights are located at '. '

125% inse-tbn intervalsý The zone reference lights will activate at 3 insertion to give an indication of the rod drop time and rod location.

Measuring rod drop times, prior to reactor criticality after reactor vessel head removal land aft*CONTROL RIkD drive s.ystem rtuaintenance or mod cato , ensures that the reactor internals and CRDM will not.

0 3

3/4 insertion, which provides the most accurate position indication Q

BWAOG STS B 3.1.4-9 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 100 of 307

Attachment 1, Volume 6, Rev. 1, Page 101 of 307

-CONTROL ROD Group Alignment Limits, B 3.1.4 BASES SURVEILLANCE REQUIREMENTS (continued) interfere with CONTROL ROD motion or rod drop time. This Surveillance is performed during a plant outage, due to the plant conditions needed to perform the SR and the potential~for an unplanned plant transient if the Surveillance were performed with the. reactor at power.

This testing is normally performed with all reactor coolant pumps operating and average moderator temperature --525°F.to simulate a reactor trip under actual conditions. However, if the rod drop times are determined with less than four reactor coolant pumps operating, a Note'.

allows power operation to continue, provided operation is restricted to the pump combination utilized during the rod drop time determination.

REFERENCES 1. 110CFR50,Appen i GDC10andGDC26.

0

2. 10 CFR 50.46. UFSAR, Appendices 3D.1.6, Criterion 0

USection 10- Reactor Design; 3D.1.21, Criterion Sen15.2.3 25- Protection System Requirements 3 4r FSARi C~halpter [K1 For Reactivity Control Malfunctions;

'4 F U 30.1.22, Criterion 26 - Reactivity Control System Redundancy and Capability; 3D.1.23, Criterion 27 -

0

5. FSA , Secti []

Combined Reactivity Control Systems Capability; and 3D.1.24, Criterion 28 - 0

.ESAR, Section [. 1..

ReacR, e tivityimits 0* 0 BYVOG STS B 3.1.4-10 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 101 of 307

Attachment 1, Volume 6, Rev. 1, Page 102 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.4 BASES, CONTROL ROD GROUP ALIGNMENT LIMITS

1. Changes are made (additions, deletions, and/or changes) to the ISTS Bases which reflect the plant specific nomenclature, number, reference, system description, analysis, or licensing basis description.

2. These punctuation corrections have been made consistent with the Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 5.1.3.

3. The Applicable Safety Analyses discussions concerning the Required Actions have been deleted since the Bases for the Required Action provides the associated justification.

4. The brackets have been removed and the proper plant specific information/value has been provided.

5. Changes have been made to be consistent with changes made to the Specification.

6. Changes have been made to be consistent the Specification.

7. Davis-Besse was designed and under construction prior to the promulgation of 10 CFR 50, Appendix A. The design of Davis-Besse meets the intent of 10 CFR 50, Appendix A published in the Federal Register on February 20, 1971, and as amended in Federal Register on July 7, 1971. Bases references to the 10 CFR 50, Appendix A criteria have been replaced with references to the appropriate section of the UFSAR.

8. Editorial change made for consistency.

0.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 102 of 307

Attachment 1, Volume 6, Rev. 1, Page 103 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 103 of 307

Attachment 1, Volume 6, Rev. 1, Page 104 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS ITS 3.1.4, CONTROL ROD GROUP ALIGNMENT LIMITS There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 104 of 307

, Volume 6, Rev. 1, Page 105 of 307 ATTACHMENT 5 ITS 3.1.5, SAFETY ROD INSERTION LIMITS , Volume 6, Rev. 1, Page 105 of 307

, Volume 6, Rev. 1, Page 106 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs) , Volume 6, Rev. 1, Page 106 of 307

Attachment 1, Volume 6, Rev. 1, Page 107 of 307 ITS 3.1.5 ITS Gi REACTIVITY COITROL SYSTEMS SAFETY ROD IVSERTION LIMIT LIMITING CONDITION FOR OPERATION LCO3.1.5 3,1.3.5 All safety rods shall be fully withdrawn.

APPLICABILITY: I and

LCO 3.1.5 NOTE With a maximu", Of one saýfety rod not fully withdr ecetfor S1uM02 ACTION A vei ance testing oo-u-rei ther* -rsuant to pecifiction 1.1. 1 within one r Add proposed Required Actions A.1. 1 a:nd:A. 1. 2 I a/,w rod orOmisaligned

{Add proposed ACLTIOýN:Bj SURVEILLANCE REQUIREMENTS SR3.1.5.1 4.1.3.5]a. Wi t* safety Each rod shall 15 minutes be determined prio*/O to be~fully withdrawn:

withdrawal of aptiregu'l i'tlin rod dring an approach t/o/realcltor criti cal it* /

b. At least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter.

S TS. 3 A02 Wit Kf M0l DAVIS-BESSE, UNIT 1 3/4 1-25 Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 107 of 307

Attachment 1, Volume 6, Rev. 1, Page 108 of 307 DISCUSSION OF CHANGES ITS 3.1.5, SAFETY ROD INSERTION LIMITS ADMINISTRATIVE CHANGES A01 In the conversion of the Davis-Besse Current Technical Specifications (CTS) to the plant specific Improved Technical Specifications (ITS), certain changes (wording preferences, editorial changes, reformatting, revised numbering, etc.) are made to obtain consistency with NUREG-1430, Rev. 3.1, "Standard Technical Specifications-Babcock and Wilcox Plants" (ISTS).

These changes are designated as administrative changes and are acceptable because they do not result in technical changes to the CTS.

A02 The Applicability of CTS 3.1.3.5 is modified by footnote

that states "See Special Test Exceptions 3.10.1 and 3.10.2." ITS 3.1.5 Applicability does not contain the footnote or a reference to the Special Test Exceptions.

The purpose of the footnote reference is to alert the user that Special Test Exceptions exist that may modify the Applicability of the Specification. This change is acceptable because it is an ITS convention to not include these types of footnotes or cross-references. This change is designated as administrative as it incorporates an ITS convention with no technical change to the CTS.

A03 If a maximum of one safety rod is not fully withdrawn, CTS 3.1.3.5 Action a requires the rod to be fully withdrawn. ITS 3.1.5 does not contain a Required Action stating fully withdraw the rod.

This change is acceptable because the technical requirements have not changed. Restoration of compliance with the LCO is always an available Required Action and it is the convention in the ITS to not state such "restore" options (in this case withdraw) explicitly unless it is the only action or is required for clarity. This change is designated as administrative because it does not result in technical changes to the CTS.

A04 If a maximum of one safety rod is not fully withdrawn, CTS 3.1.3.5 Action b allows the rod to be declared inoperable and apply Specification 3.1.3.1.

Specification 3.1.3.1 requires the control (safety and regulating) rods to be OPERABLE and positioned within the alignment limits. For a safety rod not fully withdrawn CTS 3.1.3.1 Action c would be entered and the plant is allowed to continue to operate as long as the compensatory actions are taken. ITS 3.1.5 Required Action A.2 requires the rod to be declared misaligned. This changes the CTS by clarifying the type of Actions to take when one safety rod cannot be fully withdrawn. Changes to the actions in .CTS 3.1.3.1 Action c are discussed in the Discussion of Changes for ITS 3.1.4, "Control Rod Group Alignment Limits."

This change is acceptable because the technical requirements have not changed. With a maximum of one safety rod inoperable, CTS 3.1.3.5 and ITS 3.1.5 will require the same Condition to be entered. This change is designated as administrative because it does not result in technical changes to the CTS.

Davis-Besse Page 1 of 4 Attachment 1, Volume 6, Rev. 1, Page 108 of 307

Attachment 1, Volume 6, Rev. 1, Page 109 of 307 DISCUSSION OF CHANGES ITS 3.1.5, SAFETY ROD INSERTION LIMITS MORE RESTRICTIVE CHANGES M01 CTS 3.1.3.5 is applicable in MODE 1 and MODE 2 with keff> 1.0. ITS 3.1.5 is applicable in MODES 1 and 2. This changes the CTS by expanding the Applicability from MODE 2 with the reactor critical to all times in MODE 2.

The purpose of CTS 3.1.3.5 is to ensure that the safety rods are fully withdrawn prior to withdrawing the regulating rods in order to ensure that there is sufficient safety margin available to quickly shutdown the reactor. This change is acceptable because applying that requirement prior to withdrawing the regulating rods and bringing the reactor critical ensures that the safety margin is available and is consistent with plant operation, in that the safety rods are completely withdrawn before beginning to withdraw the regulating rods and approaching criticality. This change is designated as more restrictive because it increases the conditions under which Technical Specification controls will be applied.

M02 With one safety rod not fully withdrawn, CTS 3.1.3.5 Action b requires the safety rod to be declared inoperable within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . Under the same condition, ITS 3.1.5 ACTION A not only requires a similar action, but also requires either a verification that SDM is within the limit within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months (ITS 3.1.5 Required Action A. 1.1) or to initiate boration to restore SDM to within the limit within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months (ITS 3.1.5 Required Action A.1.2). This changes the CTS by adding additional Required Actions when one safety rod is not fully withdrawn.

The purpose of CTS 3.1.3.5 Action b is to provide appropriate compensatory measures when a safety rod is not fully withdrawn when required. With a safety rod not fully withdrawn as assumed in the accident analysis, there is a possibility that the required SDM may be adversely affected. Therefore, SDM must be evaluated. One hour allows the operator adequate time to determine SDM. If SDM is not within limit, then restoration of the SDM limit is required by initiating boration within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . The 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Completion Time to initiate boration is reasonable, based onthe time required for potential xenon redistribution, the low probability of an accident occurring, and the steps required to complete the action. This allows the operator sufficient time to align the required valves and start the boric acid pumps. Boration will continue until the required SDM is restored. This change is acceptable because it provides additional compensatory measures to take due to the possibility of SDM limit not being met when one safety rod is not fully withdrawn. This change is designated as more restrictive because additional Required Actions are required in the ITS than in the CTS.

M03 CTS 3.1.3.5 Action only provides compensatory actions for a maximum of one safety rod not fully withdrawn. If two rods or more rods are not fully withdrawn entry into CTS 3.0.3 is required. CTS 3.0.3 requires the plant to be in Hot Standby (MODE 3) within 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months . ITS 3.1.5 ACTION B requires entry when more than one safety rod is not fully withdrawn and requires a verification of SDM to be within limit or to initiate boration to restore SDM to within limit within one hour and requires the plant to be in MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . This changes the CTS by establishing the SDM requirements and to place the unit in MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months instead of 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months .

Davis-Besse Page 2 of 4 Attachment 1, Volume 6, Rev. 1, Page 109 of 307

Attachment 1, Volume 6, Rev. 1, Page 110 of 307 DISCUSSION OF CHANGES ITS 3.1.5, SAFETY ROD INSERTION LIMITS The purpose of requiring a shutdown is to place the unit in condition where the requirements do not apply. With more than one safety rod not fully withdrawn, there is a possibility that the required SDM may be adversely affected.

Therefore, SDM must be evaluated. One hour allows the operator adequate time to determine SDM. Restoration of the required SDM, if necessary, requires increasing the RCS boron concentration to provide negative reactivity. The required Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months for initiating boration is reasonable, based on the time required for potential xenon redistribution, the low probability of an accident occurring, and the steps required to complete the action. This allows the operator sufficient time to align the required valves and start the boric acid pumps. Boration will continue until the required SDM is restored. This change is acceptable because it provides an adequate period of time to be in a MODE in which the requirement does not apply. The Completion Time of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is reasonable, based on operating experience, for reaching MODE 3 from full power in an orderly manner and without challenging unit systems. This change is designated as more restrictive because it reduces the Completion Time to be in MODE 3.

RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES L01 (Category5 - Deletion of Surveillance Requirement) CTS 4.1.3.5.a requires verification that each safety rod be fully withdrawn within 15 minutes prior to withdrawal of any regulating rod during an approach to reactor criticality.

ITS 3.1.5 does not require verification that each safety rod be fully withdrawn within 15 minutes prior to withdrawal of any regulating rod during an approach to reactor criticality. This changes the CTS by eliminating the requirement that each safety rod be fully withdrawn within 15 minutes prior to withdrawal of any regulating rod during an approach to reactor criticality.

The purpose of CTS 4.1.3.5.a is to verify that the safety rods are withdrawn prior to withdrawal of any regulating rod during an approach to reactor criticality. This change is acceptable because the deleted Surveillance Requirement is not necessary to verify that the equipment used to meet the LCO can perform its required functions. Thus, appropriate equipment continues to be tested in a manner and at a Frequency necessary to give confidence that the equipment can perform its assumed safety function. Under the ITS Applicability of MODE 2 and the requirement of ITS LCO 3.0.4, the safety groups must be withdrawn prior to entering the ITS Applicability of MODE 2. Furthermore, ITS SR 3.1.5.1 requires a verification that the safety rods are fully withdrawn every 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . Since ITS SR 3.0.4 requires Surveillances to be met prior to entering the Applicability of an Davis-Besse Page 3 of 4 Attachment 1, Volume 6, Rev. 1, Page 110 of 307

Attachment 1, Volume 6, Rev. 1, Page 111 of 307 DISCUSSION OF CHANGES ITS 3.1.5, SAFETY ROD INSERTION LIMITS LCO, ITS SR 3.1.5.1 is required to be performed within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months prior to entering MODE 2. This ensures that prior to entering the Applicability the safety rods are at their correct position (fully withdrawn). However, it is not required to verify compliance within a much shorter (15 minutes) specified time just prior to initial regulating group withdrawal. Specifying a much shorter time is not necessary to ensure that the safety groups are above the insertion limit prior to initial regulating group withdrawal, as long as the safety groups are withdrawn prior to entering MODE 2. In addition, the ITS Bases identifies that safety rods are fully withdrawn prior to withdrawing any regulating rods. This change is designated as less restrictive because Surveillances which are required in the CTS will not be required in the ITS.

Davis-Besse Page 4 of 4 Attachment 1, Volume 6, Rev. 1, Page 111 of 307

Attachment 1, Volume 6, Rev. 1, Page 112 of 307 Improved Standard Technical Specifications (ISTS) Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 112 of 307

Attachment 1, Volume 6, Rev. 1, Page 113 of 307 Safety. Rod Insertion Limits CTS 0 3.1 'REAC-TIViTYCONTROL SYSTEMS 3.1.5 Safety Rod Insertion Limits 3.1.3.5 LCO 3.1.5 Each safety rod shall be fully withdrawn.

- NOTE--------------------------

3.1.3.5 Not required for any safety rod inserted to perform SR 3.1.4.2.

Action -- - - - - - - - - - - - - -- -- - - -- - - - -- - -- - - - . - -... ... ---- -

APPLICABILITY: MODES 1 and 2.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME

,A. One safety rod not fully A.1.1 Verify SDM is within ffwV- 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 3.1.3.5 withdrawn. limri s sp eci te /n tfej-Action COLRý OR A.1.2 Initiate boration to restore 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months SDM to within limit.

AND fImioeO A.2 Declare the rod irjoIr 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 0 DOC M03 'B. More than one safety B.1.1 , Verify SDMis within[I__ 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months rod not fully withdrawn. liis sp~ecified/ln th_*---

OR B.1.2 Initiate boration to restore 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months SDM towithin limit.

AND BWOG STS 3.1.5-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 113 of 307

Attachment 1, Volume 6, Rev. 1, Page 114 of 307 Safety Rod Insertion Limits

3. 1. 5 ACTION (continued)

CONDiTION REQUIRED ACTION COMPLETION TIME DOC M03 B.2 Be in MODE 3. .6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months SURVEILLANCE REQUIREMENTS SURVEILLANCE *FREQUENCY 4.1.3.5 SR 3.1.5.1 Verify each safety rod is fully withdrawn. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months BMWG STS 3.1.5-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 114 of 307

Attachment 1, Volume 6, Rev. 1, Page 115 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.5, SAFETY ROD INSERTION LIMITS

1. ISTS 3.1.5 Required Action A.2 requires the safety rod that is not fully withdrawn to 0 be declared inoperable. The ISTS 3.1.5 Bases states that "This requires entry into LCO 3.1.4, "CONTROL ROD Group Alignment Limits." ITS 3.1.4 includes an ACTION for one control rod not aligned to within 6.5% of its group average height (ACTION A), more than one CONTROL ROD not aligned within 6.5% of its group average height (ACTION C), and one or more rod inoperable (ACTION D). ITS 3.1.5 Required Action A.2 requires the rod to be declared misaligned. This change is necessary to be consistent with the current licensing basis in CTS 3.1.3.5 Action b and CTS 3.1.3.1 Action c. Declaring the rod to be misaligned will require entry into ITS 3.1.4 ACTION A (One CONTROL ROD not aligned within 6.5% of its group average height), rather than ISTS 3.1.4 ACTION D, which requires the plant to shutdown.

2. Changes are made to be consistent with the format of the ITS. The location of where a parameter's limits reside, whether in the COLR or an actual LCO statement, is not normally specified in the Required Action. The Required Action normally states that the parameter shall be "within limits."

S Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 115 of 307

Attachment 1, Volume 6, Rev. 1, Page 116 of 307 Improved Standard Technical Specifications (ISTS) Bases Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 116 of 307

Attachment 1, Volume 6, Rev. 1, Page 117 of 307 Safety Rod Insertion. Limrv B 3.1 .5 B.3.1 REACTIVITY CONTROL SYSTEMS B,3.1.5 Safety Rod Insertion Limit4ý"o 0 BASES BACKGROUND The insertion limits of the safetyand r u ating rods are initial condition assumptions in all safety analyses thatassume rod insertion upon reactor trip. The insertion limits directly affectcore power distributions and assumptions of available SDM, ejected rod worth, and initial reactivity insertion

~UFSAR, rate. Appendices 313.1.6,31D.1.21, 3D.1.22, 3D.1.23, and 313.1.24 IThe applicable criteria for the reactivity and power di~stribution design, Lir~equirements are 1l0 CFR 50,/Appendix A, GDC.1 0, ",Reactor Design;"

D ,C,26 ','.Oeactivity Control

y t m R d n a c-arid Capability," GDC G-6 128','Reaclivity Lim-its' (Ref. 1), and 10 CFR: 50.46, "Acceptance criteria for Emergency Core Cooling. Systems for Light Water Nuclear Power Reactors" (Ref. 2).

Limits.on safety rod insertion have been established, and all rod positions are monitored and controlled during power operation toensure that the reactivity limits, ejected rod worth, and SDM limits are preserved.

The regulating groups are used for precise reactivity control of the reactor. The positions of the regulating groups are normally automatically controlled by thela u accontrol system, but they can also be manually controlled. They are capable of adding negative reactivity very quickly 0 (compared to borating). The regulating groups must be maintained above, designed insertion limits and are typically near the fully withdrawn position during normal operations. Hence, they are not.capable of adding a large amount of positive reactivity. Boration or dilution of the Reactor, Coolant System (RCS) compensates for the reactivity changes associated with large changes in RCS temperature and fuel burnup.

The safety groups can be fully withdrawn without the core going critical.

This provides available negative reactivity in the event of boration errors.

The safety groups are. controlled manually by the control room operator.

During normal full power operation, the safety groups are fully withdrawn..

The safety.groups must be completely withdrawn from the core prior to withdrawing any regulating groups:during an approach to criticality. The safety groups remain in the fully withdrawn position until the reactor is shut,dowr* They add negative reactivity to shut downthe reactor upon 0 receipt of a reactor trip signal.

or if being tested in accordance with SR 3.14.2.

BXAOG STS B 3.1.5-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 117 of 307

Attachment 1, Volume 6, Rev. 1, Page 118 of 307 Safety Rod Insertion Limit'ý-- -

B 3.1.5 BASES APPLICABLE On: a reactor trip, all rods (safety groups and regulating groups), except:

SAFETY .the most reactive rod, are, ass'umerd to insert int6 the core. The safety ANALYSES groups shall be at their fully withdrawn limits and available to insert the maximum amount ofnegative reactivity: on a reactor'.trip signal. The regulating.groups may be partially inserted in the core as allowed by LCO 3.2.1, "Regulating Rod Insertion.Limits." The safety group and regulating rod insertion limits are established to ensure that a sufficient amount of negative reactivity is available to shut down the reactor and maintain the required SDM (see LCO 3.1 .1, "S.H UTDOWN MARGIN (SDM)") following a reactor trip from fullpower. The combination of regulating groups and safety groups (!ess the most reactive rod, which is assumed to be fully withdrawn) is sufficient to take. the reactor fromfull power conditions at rated temperature. to zero power and to maintain the required SDM at rated no load temperature ý(Ref..3). The safety group insertion limit also limits the reactivity worth of an ejected safety rod.

The a ceptance criteria fo addressing safety and egulating rod.group inserti n limits and inopera ility ormisalignment ar that:

a. Th re shall be no violat ons of:

1. pecified acceptabl fuel design limits .or 0

2. CS pressure boun ry integrity and 0 b. The c re must remain sub ritical after accident tra sients.

The safety rod insertion limits satisfy Criteria 25an 10 CFR 50.36(c)(2)(ii).

of 0 LCO The safety groups must be fully withdrawn any time the reactor iscritical or approaching criticality.. This ensures that a sufficient'amount of negative reactivity is available to shut down the reactor and maintain the required SDM following a reactor trip.

This LCO has been modified by a Note indicating the LCO requirementis suspended for those safety rods which are inserted solely due to testing in accordance with SR 3.1.4.2. This SR verifies the freedom of the rods to move, and requires the safetygroup to move below the LCO limits, which would normally violate the LCO.

BWOG STS B 3.1.5-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 118 of 307

Attachment 1, Volume 6, Rev. 1, Page 119 of 307 Safety Rod Insertion Limit-- 0 B 3.1.5 BASES APPLICABILITY The safety groups must be withinjtheir insertion limitswith .the reactor in MODES 1 and 2. This ensures that a sufficient amount of negative reactivity is'available to shut down t.he reactor and maintainthe required SDM following a reactor trip,. Refer to LCO 3.1.1 for SDM requirements :in MODES.: 3,ý 4, and 5. LCO 3.9.1, ,"Boron Concentration,' ensures adeIquateýSDM in MODE 6.

ACTIOI s A.1 .1 A:1 .2, and A.2 misaligned otio~nAof The safety rod must be declaredo r-ae within a 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months time frame.

This requires entry intoýLCO 3.1 .4, "CONTROL ROD Group Alignment 0 Limits-." In addition, since the safety rod may be inserted fartherthan the groupaverage insertion for a long time, SDM must be evaluated.

Ensuring.the SDM meets the minimum requirement within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months is adequate to determine that further degradation of the SDM is not occurring.

Restoration of the required SDM requires increasing the boron concentration,, since the safety rod may remain misaligned and not be

[th*

providing its normal negative reactivity on tripping. RCS boration must occur asdescribed ý BasesS. The required Completion 0 Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months for initiating boration is reasonable, based on the time required for potential xenon redistribution, the low probability of an accident occurring, and the .steps required to complete the action. This allows the operator sufficient time for aligning the required valves and starting the boric acid pumps. Boration will continue until the required SDM is, restored.

The allowed Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 'provides an acceptable time for evaluating and repairing minor problems'without allowing the 'plant to remain in an. unacceptable condition for an extended period of time.

B.1.1 and B.1.2 not fully withdrawn When more than one safety rod is abethere is a possibility that

.mo the required SDM may be adversely affected. Under these conditions, it 0

is important to determine the SDM, and if it is less 'than the, required value, initiate boration until the required SDM is recovered. The Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 'is adequate for determining SDM and, if necessary, forinitiating emergency boration to restore SDM.

Inthis situation, SDM verification must include the worth of the untrippable rod as well as the rod of maximum worth.

BWVOG STS B 3.1.5-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 119 of 307

Attachment 1, Volume 6, Rev. 1, Page 120 of 307 1

Safety Rod Insertion LimitFr-*

B3.1.5 BASES ACTIONS (continued)

B. not fully B.2 -withdrawn If more than onesafety rod isMi o ra le the unit must be brought to a MODE where the LCO is not applicable. The allowed CompletionTime of 0

6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is reasonable, basedon operating experience, for reaching the required MODE from full power conditions in an orderly manner and without challenging plant systems:

.SURVEILLANCE SR 3.1.5:1 REQUIREMENTS Verification -that each safety rod is fully withdrawn ensures the rods are available to provide reactor shutdown capability.

Verification that individual safety rod positions are fully withdrawn at a 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Frequency allowsthe operator to detect a rod beginning to deviate fromits expected position. Also, the 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Frequency takes into, account other information available in the control room forthe purpose of, monitoring the status of the safety rods.

REFERENCES 1. 110C 50,Apper *ix.A,GDC10addGDC 2. 0

2. 10 CFR 50.46.5

3. FSAR, Section [1. 00 I

FSAR, Appendices 3D.1.6, Criterion 10- Reactor Design; 3D.1.21, Criterion 25- Protection System Requirements For Reactivity Control Malfunctions; 3D.1.22, Criterion 26 - Reactivity Control System Redundancy and Capability; 3D.1.23, Criterion 27- Combined Reactivity Control System Capability; and 3D.1.24, Criterion 28 - Reactivity Limits BVWOG STS B 3.1.5-4 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 120 of 307

Attachment 1, Volume 6, Rev. 1, Page 121 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.5 BASES, SAFETY ROD INSERTION LIMITS

1. Changes are made (additions, deletions, and/or changes) to the ISTS Bases which reflect the plant specific nomenclature, number, reference, system description, analysis, or licensing basis description.

2. Changes have been made to be consistent with changes made to the Specification.

3. The brackets have been removed and the proper plant specific information/value has been provided.

4. Changes have been made to be consistent with the Specification.

5. Davis-Besse was designed and under construction prior to the promulgation of 10 CFR 50, Appendix A. The design of Davis-Besse meets the intent of 10 CFR 50, Appendix A published in the Federal Register on February 20, 1971, and as amended in Federal Register on July 7, 1971. Bases references to the 10 CFR 50, Appendix A criteria have been replaced with references to the appropriate section of the UFSAR.

6. Editorial changes made for clarity.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 121 of 307

Attachment 1, Volume 6, Rev. 1, Page 122 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 122 of 307

Attachment 1, Volume 6, Rev. 1, Page 123 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS ITS 3.1.5, SAFETY ROD INSERTION LIMITS There are no specific NSHC discussions for this Specification.

0 Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 123 of 307

Attachment 1, Volume 6, Rev. 1, Page 124 of 307 ATTACHMENT 6 ITS 3.1.6, AXIAL POWER SHAPING ROD (APSR) ALIGNMENT LIMITS Attachment 1, Volume 6, Rev. 1, Page 124 of 307

, Volume 6, Rev. 1, Page 125 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs) , Volume 6, Rev. 1, Page 125 of 307

Attachment 1, Volume 6, Rev. 1, Page 126 of 307 ITS 3.1.6 ITS REACTIVITY CONTROL SYSTEMS GROUP HE'IGHT - AXIAL POWER SHAPING ROD GROUP LIMITING CONDITION FOR OPERATION LCO 3.1.6 3.1.3.2 All axial power shaping rods (APSR) shall be OPERABLE, unless fully withdrawn, and shall be positioned within +/- 6.5% (indicated position) of their group average height. A02 APPLICABILIT: MODES 1W / and 2ý.

ACTION:

ACTION A With a maximum of one APSR inoperable or misaligned from its group average height by more than +/- 6.5% (Indicated-position), operation may continue provided that within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and2hoursaftereachAPSR movement

a. The APSR gro'is positioned such that th isaligned rod is

restored bwtin limits for the group/azvrage height, or

b. It is.determined that the imbalance limits of Specification 3M2..4 are .satisfiediand/movement 0f/he APSR groiUP is preveoted while -----

Ithe rod remains toperable o misallgned/

SURVEILLANCE REOUIREMENTS Add proposed ACTION B SR 3.1.6.1 4.1.3.2.1 The position of each APSR rod shall be determined to be within the group average height limit by verifying the individual rod positions at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months e cept. duri

time inter als when t asymmetric rod monitor/

is inoperable, the verify th individual rod positi (s) of the rod(s), with S0 the inoperable as4mmetric ro monitor at east once er 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

See Special Tes ý eptions 3.10.1 and 3.10.2 S0 DAVIS-BESSE, UNIT I 3/4 1-21 Amendment No. JýJ, 196 Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 126 of 307

Attachment 1, Volume 6, Rev. 1, Page 127 of 307 DISCUSSION OF CHANGES ITS 3.1.6, AXIAL POWER SHAPING ROD (APSR) ALIGNMENT LIMITS ADMINISTRATIVE CHANGES A01 In the conversion of the Davis-Besse Current Technical Specifications (CTS) to the plant specific Improved Technical Specifications (ITS), certain changes (wording preferences, editorial changes, reformatting, revised numbering, etc.) are made to obtain consistency with NUREG-1430, Rev. 3.1, "Standard Technical Specifications-Babcock and Wilcox Plants" (ISTS).

These changes are designated as administrative changes and are acceptable because they do not result in technical changes to the CTS.

A02 The Applicability of CTS 3.1.3.2 is MODES 1 and 2 with footnote

stating "See Special Test Exception 3.10.1 and 3.10.2." ITS 3.1.6 Applicability is MODES 1 and 2 and does not contain the footnote or a reference to the Special Test Exception. This changes the CTS by deleting explicit reference to the Special Test Exception.

The purpose of the footnote reference is to alert the user that a Special Test Exception exists that may modify the Applicability of the Specification. It is an ITS convention to not include these types of footnotes or cross-references. This change is designated as administrative as it incorporates an ITS convention with no technical change to the CTS.

A03 CTS 3.1.3.2 Action a states that with a maximum of one APSR inoperable or misaligned from its group average height by more than the alignment requirements, operation may continue provided that within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months the APSR group is positioned such that the misaligned rod is restored to within limits of the group average height requirements. ITS 3.1.6 does not contain a Required Action stating that the APSR group must be positioned such that the misalignment rod is restored to within limits. This changes the CTS by deleting the explicit action to restore to within limits.

This change is acceptable because the technical requirements have not changed. Restoration of compliance with the LCO is always an available Required Action and it is the convention in the ITS to not state such "restore" operations explicitly unless it is the only action or is required for clarity. This change is designated as administrative because it does not result in technical changes to the CTS.

MORE RESTRICTIVE CHANGES M01 CTS 3.1.3.2 Action states that with a maximum of one APSR inoperable or misaligned, operation may continue provided certain actions are completed within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . If those actions are not complete, CTS 3.0.3 would be entered requiring entry into Hot Standby (MODE 3) within 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months , for a total time from condition discovery to entry into MODE 3 of 9 hours1.041667e-4 days 0.0025 hours 1.488095e-5 weeks 3.4245e-6 months . ITS 3.1.6 ACTION B states that if any Required Action and associated Completion Time of Condition A (one APSR not within alignment limits) is not met, the unit must be in MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . The shortest Completion Time in ITS 3.1.6 ACTION A is 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

Therefore, under the ITS, the shortest possible time from discovery of the Davis-Besse Page 1 of 3 Attachment 1, Volume 6, Rev. 1, Page 127 of 307

Attachment 1, Volume 6, Rev. 1, Page 128 of 307 DISCUSSION OF CHANGES ITS 3.1.6, AXIAL POWER SHAPING ROD (APSR) ALIGNMENT LIMITS condition to entry into MODE 3 is 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . This changes the CTS by providing one less hour for entry into MODE 3 following discovery of a misaligned APSR if Required Actions are not met.

The purpose of requiring a shutdown with a maximum of one APSR inoperable or misaligned is to place the plant in a condition where the requirements for APSR OPERABILITY and alignment limits are not required. This change is acceptable because it provides an adequate period of time to correct the condition or be in a MODE in which the requirement does not apply. The Completion Time of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is reasonable, based on operating experience, for reaching MODE 3 from full power in an orderly manner and without challenging unit systems. This change has been designated as more restrictive because it reduces the Completion Time to be in MODE 3.

RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES L01 (Category 4- Relaxation of Required Action) When there is a maximum of one APSR inoperable or misaligned from its group average, CTS 3.1.3.2 Action b requires the imbalance limits of Specification 3.2.1 to be verified to be within limit in 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . However, the Action does not allow movement of the APSR group while the rod remains inoperable or misaligned. ITS 3.1.6 ACTION A requires the performance of SR 3.2.3.1, the AXIAL POWER IMBALANCE operating limit verification, within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after each APSR movement. This changes the CTS by allowing the movement of the APSRs however adds a requirement to verify the AXIAL POWER IMBALANCE is within limit within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after each APSR movement.

The purpose of CTS 3.1.3.2 Action is to monitor the AXIAL POWER IMBALANCE when an APSR is misaligned or inoperable. This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering that only a small amount of time is provided to reestablish the required features and the low probability of a DBA occurring during the repair period. The ITS requires the performance of SR 3.2.3.1, the AXIAL POWER IMBALANCE operating limit verification, within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after each APSR movement. Verification of the AXIAL POWER IMBALANCE after APSR movement ensures the movement of the APSR has not resulted in a violation of the AXIAL POWER IMBALANCE limit.

Davis-Besse Page 2 of 3 Attachment 1, Volume 6, Rev. 1, Page 128 of 307

Attachment 1, Volume 6, Rev. 1, Page 129 of 307 DISCUSSION OF CHANGES ITS 3.1.6, AXIAL POWER SHAPING ROD (APSR) ALIGNMENT LIMITS This is acceptable because significant xenon redistribution will not occur in this short period. This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

L02 (Category 7- Relaxation of Surveillance Frequency- Non-24 Month Type Change) CTS 4.1.3.2.1 requires the position of each APSR to be determined to be within group average height limits at least once every 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months except during time intervals when the asymmetric rod monitor is inoperable. When the asymmetric rod monitor is inoperable, CTS 4.1.3.2.1 requires verification of the individual rod position(s) of the rod(s), with the inoperable asymmetric rod monitor at least once per 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . ITS SR 3.1.6.1 requires verification of the position of each APSR is within limit every 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . This changes the CTS by eliminating the requirement to verify the individual rod position(s) of the rod(s),

with the inoperable asymmetric rod monitor at least once per 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months The purpose of CTS 4.1.3.2.1 is to periodically verify that the APSRs are within the alignment limit. This change is acceptable because increasing the Frequency of verification of the position of an APSR when the asymmetric rod monitor is inoperable is unnecessary. The inoperability of the monitor does not increase the probability that the APSR is not within the alignment limit. The routine 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Frequency (ITS SR 3.1.6.1) continues to ensure the APSRs are within the alignment limit. Furthermore, the monitor is used for indication only.

The use of the asymmetric rod monitor is not credited in any safety analysis.

Thus, any response determined necessary by plant personnel due to an inoperable alarm is more appropriately controlled by plant procedures, not Technical Specifications. This change is designated as less restrictive because Surveillances will be performed less frequently under the ITS than under the CTS.

Davis-Besse Page 3 of 3 Attachment 1, Volume 6, Rev. 1, Page 129 of 307

Attachment 1, Volume 6, Rev. 1, Page 130 of 307 Improved Standard Technical Specifications (ISTS) Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 130 of 307

Attachment 1, Volume 6, Rev. 1, Page 131 of 307 APSR Alignment' Limits 3.i.6 CTS 3.1 ýREAC!TIV.ITYCONTROL SYSTEMS 3.1.6 AXI.AL POWER SHAPING ROD (APSR) Alignment Limits unless fully withdrawn, shall be 0

0 3.1.3.2 LCO 3.1.6 'Each APSR-shall be OPERABLE/and'aligned within M6.5 ,%of its group

,average,:height.

APPLICABILITY: MODES 1 and 2.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME 3.1.3.2 Action A. One APSR inoperable=,. A.1 Perform SR 3.2.3.1. 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months not aligned within its limits, or both. AND 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after each APSR movement

.C M01 B. Requited Action and associated Completion B.A Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months Time not met.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY 4.1.3.2.1 SR 3.1.6.1 Verify position of each APSR is within M6.5 /o of the group average height.

12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 0 BWOG STS 3.1.6-1 Rev. 3.0, 03131/04 Attachment 1, Volume 6, Rev. 1, Page 131 of 307

Attachment 1, Volume 6, Rev. 1, Page 132 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.6, AXIAL POWER SHAPING ROD (APSR) ALIGNMENT LIMITS

1. The LCO statement has been modified to exclude, from the OPERABILITY requirement, when the APSR is fully withdrawn. APSR Insertion Limits in the COLR prohibit inserting APSRs once they are fully withdrawn. To ensure this requirement is maintained, current Davis-Besse practice is to disable the normal power supply to the fully withdrawn APSRs, which essentially renders the associated APSRs inoperable. This allowance is consistent with current licensing basis, since CTS LCO 3.1.3.2 only requires non-fully withdrawn APSRs to be OPERABLE.

2. The brackets have been removed and the proper plant specific information/value has been provided.

S Davis-Besse Page 1 of I Attachment 1, Volume 6, Rev. 1, Page 132 of 307

Attachment 1, Volume 6, Rev. 1, Page 133 of 307 Improved Standard Technical Specifications (ISTS) Bases Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 133 of 307

Attachment 1, Volume 6, Rev. 1, Page 134 of 307 APSR Alignment Limits B 3i16 B13.1 REACTIVITY CONTROL SYSTEMS B 3.1.6 AXIAL POWER-SHAPING ROD (APSR) AlignmepntLimits BASES, UFSAR, Appendices 3D.1.6, 3D.1.21, 30.1.22, 3D.1.23, and 3D.1.24 1 BACKGROUND The OPERABILITY of theAPSRs and rod misalignment are initial

.condition assumptions in the safety anaIysis that directly affect core power distributions. The applicable criteria for these power distribution design requirements are 0 CM 50, AppeixA. GDC 1lý "Reactor -

Des , and GbQ 26, "Reacti imiLtsi (Ref. 1), and 10 CFR 50:46, "Acceptance Criteria for Emergency CoreCooling. Systems for Light Water Nuclear Power Reactors" (Ref. 2).

Mechanical or electrical failures may cause an.APSR to become inoperable or to become misaligned from its group. APSR inoperability or misalignment may cause~increased power peaking, due to the asymmetric reactivity distribution. Therefore,, APSR alignment and OPERABILITY are related to core operation within design power peaking limits.

Limits on APSR alignment and OPERABILITY have been established',

and all rod positions are monitored and controlled during power operation:

to ensure that the power distribution limits defined by the design peaking limits are preserved.

CONTROL RODS and APSRs are moved by their CONTROL ROD drive!

mechanisms (CRDMs). Each CRDM moves its rod % inch for one revo ution of th leadscrew at varying rates.depending on the signal roller nut assembly around tle Ioutput from the Rod Control System.

0 The APSRs are arranged into rod groups that are radially .symmetric.

Therefore, movement of the.APSRs does not introduce radial asymmetries in the core power distribution. The APSRs, which control the axial power distribution,. are positioned manually.and do not.trip.

LCO 3. .6 is conservatively kased on use of black (A-In-Cd) APSR bounds e of.gray (Inconel) PSRs. The reacti ity w rth of black APSRs is reater than that of g~ay .APSRs; thus the imp ct of: black 0 APSR misaKignment on the core owerd.istribution is gre ter.

BWOG STS B 3.1.6-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 134 of 307

Attachment 1, Volume 6, Rev. 1, Page 135 of 307 APSR Alignment Limits B 3.1.6 BASES APPLICABLE. APS.R risalignment and inpolerability are analyzedi6the safety a nalysis SAFETY (Ref. 3)t The acceptance.n cr eria for'addressing APS inoperability or ANALYSES misaigc ment are that there hail be noeviolations of:

a, Sp cified acceptable fu design !imits.and

b. Rea tor Coolant System (RCS) pressure. bounda integrity..

Two typ of misalignment or inoperabilityare distingu shed. During moveme t.of an APSR group, one rod may stop movi while the other INSERT, 1 rods in th group continue. T is condition may cause. xcessive power peaking. The second type of isalignment occurs whe one rod drops 0 partially o fully into the reacto core. Thisevent cause an initial power educti*on, followed by a return owards the original po r, due to positive reactivity edback from the ne ative moderator temper ture coefficient.

Increased peaking during the p wer: increase may resul in excessive local Iinea heat rates (LHRs). he accident analysis an reload safety' evaluation define APSR insert n limits that ensure tha if an APSR is stuck in or ropped in, the incre se in local LHR iswithii .the design limits. The Required Action stat ment in the LCO provid s a conservati. approach to ensur that continued operatio remains within the bounds of the safety analysi :(Ref. 4).

Continued peration of-the react r with:a misaligned APS is allowed if AXIAL Po ER IMBALANCE limts are preserved.

The APSR alignment limits satisfy Criterion 2 of 10 CFR 50.3.6(c)(2)(ii).

LCO The limits on CONTROL ROD group alignment, safety rod insertion',.and APSR alignment, together with the limits on regulating rod insertion, APSR insertion, AXIAL. POWER IMBALANCE, and QPT, ensure the reactor will operate within the fuel design criteria.. The Required Action in this, LCO.ensures deviations from the alignment limits will be adjusted so that excessive local LHRs will not occur.

The limit for individual APSR misalignment is6&5.o (9 inches) deviation from the group average position. This. value is established based on the distance between reed switches, with additional allowances for uncertainty in the absolute position indicator amplifierst groupaximum Jor minimu ynt hesizer, and asymmetric alarm or faultldetectoututs The position of adn inora beod isnot included in the calculation of the rod group's average position. [misaligned cicut BWOG STS B 3.1.6-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 135 of 307

Attachment 1, Volume 6, Rev. 1, Page 136 of 307 B 3.1.6 INSERT 1 There are no explicit safety analyses associated with misalignment of APSRs. The LCOs governing APSR alignment are provided because the power distribution analysis supporting LCO 3.2.1, "Regulating Rod Insertion Limits," LCO 3.2.3, "AXIAL POWER IMBALANCE Operating Limits," and LCO 3.2.4, "QUADRANT POWER TILT (QPT),"

assumes the APSRs are OPERABLE and aligned within limits.

Misaligned APSRs may cause excessive power peaking. Continued operation of the reactor with a misaligned APSR is allowed if the power distribution limits of Section 3.2, "Power Distribution Limits," are preserved.

0 Insert Page B 3.1.6-2 Attachment 1, Volume 6, Rev. 1, Page 136 of 307

Attachment 1, Volume 6, Rev. 1, Page 137 of 307 APSR Alignment Limits B 3.1.6 S BASES LCO (continued)

Failure to meet the requirements of this LCO may produce unacceptable power peaking factors, and LH Rs, which mayconstitute initial conditions inconsistent with the safety analysis. unless fully withdrawn, u,

APPLICABILITY The APSRs are not required to be The requirements on APSR OPERABILITY'/and alignment are applicable in MODES I and 2 because these are the only MODES in which neutron 0

OPERABLE when fully withdrawn because, (or fission)power is generated and the OPERABILITY and alignment of once they are fully withdrawn, they are prohibited by the APSR insertion limits from rods have the potential to affect the safety of the plant.ý In MODES 3, 4, being inserted and the normal power supply 5, and 6., the alignment limits do not apply because the reactor is shut is normally disabled to prevent their movement. While APSRs are not required down and not producing fission power, and excessive local LHRs cannot OPERABLE when fully withdrawn, they are occur from APSR misalignment.

ýstill required to meet the alignment limits.

ACTIONS A.;I I inoperable, not aligned within its limit, or both I The ACTIONS described below are required if one APSR isýi1ale The plant is not allowed to operate with more than one inoperable APSR.

0 Thiswould require the reactor to be:shut down, in accordance with LCO 3.0.3.

An alternate to realigning a single misaligned APSR to the group average position is to. align the remainder of the APSR group to the position of the misaligned orinoperable APSR, while maintaining APSR insertion, in accordance with the: limits in the C.OLR. This restoresthe alignment requirements. Deviations up to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months will not cause significant xenon redistributionto occur. This:alternative assumes the APSR group movement does not cause the limits of LCO 3.2.2, "AXIAL POWER SHAPING ROD (APSR) Insertion Limits," to be exceeded. For this reason, APSR group movement is onlypractical for instances where small movements of the APSR group are sufficient to re-establish APSR alignment.

The reactor may continue in operation with the APSR misaligned if the limits on AXIAL POWER IMBALANCE are surveilled within'2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months to determine if the AXIAL POWER IMBALANCE is still within limits. Also, since any additional movement of the APSRs may result in additional imbalance, Required Action A.1 also requires the AXIAL POWER IMBALANCE Surveillance to be performed'again within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after

each.APSR movement. The required Completion Time of up to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months will not cause:significant xenon redistribution to occur.

BWOG STS B 3.1.6-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 137 of 307

Attachment 1, Volume 6, Rev. 1, Page 138 of 307 APSR Alignment: Limits B 3.1.6 BASES ACTIONS (continued)

B.1 The plantrmust be brought to a MODE in which the LCO does not apply if the Required Actions and associated Completion Times cannotbe met.

To achieve this status., the plant must be brought to at Ieast MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . The Completion Time of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months is reasonable, based on operating experience, for reaching MODE 3 from RTP inan orderly manner and without challenging plant systems. In MODE 3, APSR group alignment limits are not required because the reactor is:not generating THERMAL POWER and excessive local LHRs cannot occur fromAPSR misalignment.

SURVEILLANCE SR 3.1.6.1 REQUIREMENTS Verification at a 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Frequency that individual APSR positions are within U.5t/e of the group average height limits allows the operator to detect an APSR beginning to' deviate from its expected position. In 0

addition, APSR position is continuously available to theoperator in the control room so that during actual rod motion, deviations can immediately be detected.

REFERENCES 1. 10 Ct'R 50. ADDen'dix A. GDC 10"and GDC 2.6ý-

2. 10CFR50.46. 5 U3. FSAR, Sectioýý

( (D

ý4. \ FSAý\ Sectioý [ I . I I

I FSAR, Appendices rotection 3D.1.6, Criterion System Requirements 10 - Reactor For Reactivity Design; Control 3D.1.21, Criterion Malfunctions; 30.1.22, 25 -

riterion 26 - Reactivity Control System Redundancy and Capability; 3D.1.23, riterion 27- Combined Reactivity Control Systems Capability; and 3D.1.24 yCriterion 28 - Reactivity Limits BVWOG STS B 3.1.6-4 Rev. 3.0, 03/31104 Attachment 1, Volume 6, Rev. 1, Page 138 of 307

Attachment 1, Volume 6, Rev. 1, Page 139 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.6 BASES, AXIAL POWER SHAPING ROD (APSR) ALIGNMENT LIMITS

1. Changes are made (additions, deletions, and/or changes) to the ISTS Bases which reflect the plant specific nomenclature, number, reference, system description, analysis, or licensing basis description.

2. These punctuation corrections have been made consistent with the Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 5.1.3.

3. The Applicable Safety Analyses discussions concerning the Required Actions have been deleted since the Bases for the Required Action provides the associated justification.

4. The brackets have been removed and the proper plant specific information/value has been provided.

5. Changes have been made to be consistent with the Specification.

6. Davis-Besse was designed and under construction prior to the promulgation of 10 CFR 50, Appendix A. The design of Davis-Besse meets the intent of 10 CFR 50, Appendix A published in the Federal Register on February 20, 1971, and as amended in Federal Register on July 7, 1971. Bases references to the 10 CFR 50, Appendix A criteria have been replaced with references to the appropriate section of the UFSAR.

7. Editorial change made for consistency.

8. Changes have been made to be consistent with changes made to the Specification.

Davis-Besse Page 1 of I Attachment 1, Volume 6, Rev. 1, Page 139 of 307

Attachment 1, Volume 6, Rev. 1, Page 140 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 140 of 307

Attachment 1, Volume 6, Rev. 1, Page 141 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS ITS 3.1.6, AXIAL POWER SHAPING ROD (APSR) ALIGNMENT LIMITS There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 141 of 307

, Volume 6, Rev. 1, Page 142 of 307 ATTACHMENT 7 ITS 3.1.7, POSITION INDICATOR CHANNELS , Volume 6, Rev. 1, Page 142 of 307

, Volume 6, Rev. 1, Page 143 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs) , Volume 6, Rev. 1, Page 143 of 307

Attachment 1, Volume 6, Rev. 1, Page 144 of 307 ITS 3.1.7 ITS REACTIVITY CONTROL SYSTEMS POSITION INDICATOR CHANNELS LIMITING CONDITION FOR OPERATION LCO 3.1.7 3.1.3.3 All safety, regulating and axial power shaping control rod LA0 absolute position indicator channels and relative position indicator channels shall be OPERABLE ncab or determining the ntr1 rod1 group aver a post ons within + % 5 APPLICABILITY: MODES I and 2.

ACTION: _-

ACTIONS A and B a. With a maximum of one absolute position control rod group or one relatlve posltff per control rod group inoperable either:

1. Reduce THERMAL. OWER to - 601 of the THE LjPOWER allow-able for the eactor cooTant pump combination and reduce M^l ACTION B.1.1 the High FluX Trip Setpoint to c70% of aheTHERMAL POWER allowable f r the reactor coolant pump Combination within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , o /

cnne

Add proposed

-STARTUPa~nd POWR. OPRATIONJ may cotneprovided. LATO a) The position of the control rod with the inoperable position indicator is verified within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months by actuating itsl , 2%(50%, 75 , 100%1 pos.ton zonereference reference indicator, and zne nLA02a ACTION B b) The control rod group(s) containing the inoperable position indicator channel is subsequently maintained at the ,., , or, ithdrawn-o tion M02 and verified at this position at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter, and AddRequired Acin8.2 c) Operation is within the limits of Specification 3.1.3.5, second 3.1.3.6i or 3.1.3.9, as applicable. CompletionsTime M03 Position Add proposed Requires Actions B.2.1 ano B.2.2 ACTION A b. With more than rod group one relative inoperable, STARUpositio cator channel and POWERn OPERATION per contro may continue *L03 /-

provided/a ne requtr ens af eilher/ Mt!on a.]Io!t aZ above* L02 ffhav-e-ben ýomplted with *nd/h absolute position Indicator channels are OPEKABLE Tor the affected control rod asseftlies..-_

-Add Required _

I Action A.1M0 c, The provisi '*of Specification 3.0.4 a ot applicable. Completion A02 DAV MS8ESSE, UNIT 1 3/4 1-22 Anienchent No.A6Z ITO Add proposed ACTION C 2 Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 144 of 307

Attachment 1, Volume 6, Rev. 1, Page 145 of 307 ITS 3.1.7 ITS0 I1REACTIVITY CONTROL SYSTEMS i!POSIT!ON INDICATOR CHANNELS (Continued) i IURE - LACEthe limits specified L0 REQUIREMENTS inthe COLR 1SURVEILLANCE SR3.13.1 to absolute deter-minedEach 1i4.1.3.3 and byrelative, be OPERABLE position verifying that the relativechannel indicator shall be eto~r position !i channels and the. absolute position indicator channels heast once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months /except *uring time interva s w~hen agreethe//asymmetric within:t ro I

$monitor is "inq4:erable, then compare t/e relative position in~icator and L05 jabsolute posi ion indicator channel ) of the rod(s) with tple inoperable l jas~ymmetric red monitor at least onceDer 4 .hours.[

DAVIS-BESSE, UNIT 1 3/4 1-23 Amendment No. 162 Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 145 of 307

Attachment 1, Volume 6, Rev. 1, Page 146 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS ADMINISTRATIVE CHANGES A01 In the conversion of the Davis-Besse Current Technical Specifications (CTS) to the plant specific Improved Technical Specifications (ITS), certain changes (wording preferences, editorial changes, reformatting, revised numbering, etc.) are made to obtain consistency with NUREG-1430, Rev. 3.1, "Standard Technical Specifications-Babcock and Wilcox Plants" (ISTS).

These changes are designated as administrative changes and are acceptable because they do not result in technical changes to the CTS.

A02 CTS 3.1.3.3 Action a covers the inoperabilities for a maximum of one absolute position indicator channel per control rod group or one relative position indicator channel per control rod group. CTS 3.1.3.3 Action b covers the inoperabilities for more than one relative position indicator channel per control rod group.

CTS 3.1.3.3 Action c states, "The provisions of Specification 3.0.4 are not applicable." The allowance in CTS 3.1.3.3 Action c applies to CTS 3.1.3.3 Action a and CTS 3.1.3.3 Action b. ITS 3.1.7ACTION A covers inoperabilities for the relative position indicator channels for one or more rods and ITS ACTION B covers inoperabilities the absolute position indicator channels for one or more rods. ITS ACTION C covers the inoperabilities for absolute position indicator channel and relative position indicator channels for one or more rods. ITS 3.1.7 ACTION A and ACTION B allow continuous operation in the Applicability if the Required Actions are met. The ITS 3.1.7 ACTIONS do not include a Note similar to the allowance in CTS 3.1.3.3 Action c. This changes the CTS by deleting the explicit allowance in CTS 3.1.3.3 Action c.

The purpose of the CTS 3.1.3.3 Action c is to allow entry into the Applicability of the Specification with one or more relative position indicator channels per control rod group inoperable or with one absolute position indicator channel inoperable.

ITS LCO 3.0.4 has been added in accordance with the Discussion of Changes for ITS Section 3.0, DOC L01. This LCO allows entry into a MODE or other specified condition in the Applicability under certain conditions when a Technical Specification required component is inoperable. ITS LCO 3.0.4.a allows entry into a MODE or other specified condition in the Applicability of a Specification when the associated ACTIONS to be entered permit continued operation in the MODE or other specified condition in the Applicability for an unlimited period of time. ITS LCO 3.0.4.c allows entry into a MODE or other specified condition in the Applicability of a Specification when an allowance is stated in the individual value, parameter, or other Specification. ITS 3.1.7 ACTIONS A and B allow continuous operation for an unlimited period of time in MODE 1 and 2 as long as the applicable Required Actions are met. The allowances in ITS LCO 3.0.4.a apply to this ACTION and entry into the MODE or other specified condition in the Applicability will be allowed in the ITS. This change is acceptable because the allowances of CTS 3.1.3.3 Action c will apply in the ITS. This change is considered administrative because it does not result in technical changes to the CTS.

Davis-Besse Page 1 of 10 Attachment 1, Volume 6, Rev. 1, Page 146 of 307

Attachment 1, Volume 6, Rev. 1, Page 147 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS MORE RESTRICTIVE CHANGES M01 CTS 3.1.3.3 Action a covers the inoperabilities for a maximum of one absolute position indicator channel per control rod group or one relative position indicator channel per control rod group and CTS 3.1.3.3 Action a.1 requires the reduction in THERMAL POWER to < 60% of the THERMAL POWER allowable for the reactor coolant pump combination and a reduction of the High Flux Trip Setpoint to < 70% of the THERMAL POWER allowable for the reactor coolant pump combination within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . ITS 3.1.7 does not include this option to reduce THERMAL POWER and to reduce the High Flux Trip Setpoint. This changes the CTS by deleting the allowance to reduce THERMAL POWER and the High Flux Trip Setpoint.

This change is acceptable because the CTS 3.1.3.3 Action a.2 and ITS 3.1.7 ACTIONS A and B provide appropriate compensatory actions for inoperable absolute and relative position indicators. This change deletes an allowance to reduce THERMAL POWER and the High Flux Trip Setpoint when a maximum of one absolute or relative position indicator channel per control rod group is inoperable. CTS 3.1.3.3 Action a.2 provides an alternative action that allows operation to continue provided the position of the control rod with the inoperable position indicator is verified within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months by actuating one of the position reference indicators, the control rod group(s) containing the inoperable position indicator channel is verified to be maintained at the position reference indicators at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , and operation is within the limits provided in Specification 3.1.3.5 (Safety Rod Insertion Limit), Specification 3.1.3.6 (Regulating Rod Insertion Limits), and Specification 3.1.3.9 (Axial Power Shaping Rod Insertion Limits). ITS 3.1.7 provides specific Required Actions for inoperable relative position indicator channels (ITS 3.1.7 ACTION A) and absolute position indicator channels (ITS 3.1.7 ACTION B). These Actions do not allow operation to continue by reducing THERMAL POWER and the High Flux Trip Setpoint. Therefore, to be able to continue to operate in the ITS under the same conditions, ITS 3.1.7 ACTION A and ACTION B must be met, as applicable. This change is designated as more restrictive because an option that allows the reduction of THERMAL POWER and the High Flux Trip Setpoint in the CTS is not allowed in the ITS.

M02 CTS 3.1.3.3 Action a.2.a requires the position of the control rod with the inoperable position indicator to be verified within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months by actuating one of the position reference indicators and CTS 3.1.3.3 Action a.2.b requires the control rod group(s) containing the inoperable position indicator channel to be verified to be maintained at the position reference indicators at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter. ITS 3.1.7 ACTION B includes the same requirements however the Completion Time of 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months has been changed to 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . This changes the CTS by requiring the Action to be performed more frequently.

The purpose of CTS 3.1.3.3 Action a.2.b is to verify that the control rod group(s),

containing the inoperable position indicator channel is at the position reference indicator position at a regular frequency. This change requires the position of the control rods to be confirmed more frequently when the absolute position indicator channel is inoperable for one or more rods. This change is acceptable based on the fact that during normal power operation excessive movement of the groups is Davis-Besse Page 2 of 10 Attachment 1, Volume 6, Rev. 1, Page 147 of 307

Attachment 1, Volume 6, Rev. 1, Page 148 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS not required. Also, if the rod is out of position during this 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months period, the simultaneous occurrence of an event sensitive to the rod position has a small probability. Also, the Frequency of 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is consistent with the Frequency of CTS 4.1.3.3. (ITS SR 3.1.7.1) and therefore an accelerated Frequency is considered necessary when the position channel is inoperable. This change has been designated as more restrictive because it reduces the Completion Time from 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months to 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

M03 CTS 3.1.3.3 Action a.2.c requires verification that operation is with the limits in Specification 3.1.3.5 (Safety Rod Insertion Limit), Specification 3.1.3.6 (Regulating Rod Insertion Limits), and Specification 3.1.3.9 (Axial Power Shaping Rod Insertion Limits). CTS 3.1.3.3 Action a.1 requires this verification within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . ITS 3.1.7 Required Action B.1.2 requires the same verification however a Completion Time of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months and once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter is specified. This changes the CTS by adding the Completion Time of "once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months ."

The purpose of CTS 3.1.3.3 Action a.2.c is to ensure the applicable limits are met. This change is acceptable because the 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months Completion Time is reasonable for allowing the operator adequate time to determine the affected rods are in compliance with these LCOs. Continuing to verify the rod positions every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter is reasonable for ensuring that rod alignment and insertion are not changing and because during normal power operation excessive movement of the groups is not required. Also, if the rod is out of position during this 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months period, the simultaneous occurrence of an event sensitive to the rod position has a small probability. Furthermore, the Completion Times are consistent with the times specified to determine the position of the rods. This change is designated as more restrictive because it adds a new Completion Time to the CTS.

M04 CTS 3.1.3.3 Action b covers the inoperabilities for more than one relative position indicator channel per control rod group and requires verification that the absolute position indicators channels for the affected control rod assemblies are OPERABLE. ITS 3.1.7 ACTION A covers inoperabilities for the relative position indicator channels for one or more rods and it requires the determination that the absolute position indicator channel for the rod(s) is OPERABLE within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months and once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. This changes the CTS by adding specific Completion Time to verify the absolute position indicator channels are OPERABLE.

The purpose of CTS 3.1.3.3 Action b, in part, is to ensure the absolute position indicator channels are OPERABLE. CTS 3.1.3.3 Action b does not provide any explicit Completion Times to perform the applicable verifications. This change is acceptable because the Completion Time of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months is reasonable to provide adequate time for the operator to determine position indicator channel status.

Continuing the verification every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter in the applicable condition is acceptable, based on the fact that during normal power operation excessive movement of the groups is not required. Also, if the rod is out of position during this 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months period, the simultaneous occurrence of an event sensitive to the rod position has a small probability. Also, the Frequency of 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is consistent with the normal Frequency of CTS 4.1.3.3. (ITS SR 3.1.7.1) and therefore an accelerated Frequency is considered necessary when the relative position Davis-Besse Page 3 of 10 Attachment 1, Volume 6, Rev. 1, Page 148 of 307

Attachment 1, Volume 6, Rev. 1, Page 149 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS indication channel is inoperable. This change is designated as more restrictive because it adds new Completion Times to the CTS.

M05 CTS 3.1.3.3 does not contain an Action to follow if the provided Actions cannot be met and does not provide an Action to follow with both absolute and relative position indicator channels inoperable for one or more rods. Therefore, CTS 3.0.3 would be entered, which would allow 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months to initiate a shutdown and to be in HOT STANDBY within 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months . ITS 3.1.7 contains ACTION C, which states that the plant must immediately declare the rod(s) inoperable. For CONTROL RODs (regulating rods and safety rods) this will require entry into ITS 3.1.4 ACTION D and the plant is required to verify SDM is within limits or initiate boration to restore SDM to with limit within one hour and to be in MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . This changes the CTS by eliminating the one hour to initiate a shutdown and, consequently, allowing one hour less for the unit to be in MODE 3 and adds the SDM requirements.

This change is acceptable because it provides an appropriate compensatory measure for the described conditions. If any Required Action and associated Completion Time cannot be met, the unit must be placed in a MODE in which the LCO does not apply. The LCO is applicable in MODES 1 and 2. Requiring a shutdown to MODE 3 is appropriate in this condition. The one hour allowed by CTS 3.0.3 to prepare for a shutdown is not needed because the operators have had time to prepare for the shutdown while attempting to follow the Required Actions and associated Completion Times. The additional requirements for SDM are necessary because SDM may be adversely affected. This change is designated as more restrictive because it allows less time to shutdown and adds additional requirements associated with SDM.

RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES LA01 (Type 1 - Removing Details of System Design and System Description, Including Design Limits) CTS 3.1.3.3 requires the safety, regulating, and axial power shaping rod absolute position indicator channels and relative position indicator channels to be OPERABLE "and capable of determining the control rod group average positions within +/- 1.5%." ITS LCO 3.1.7 requires the absolute position indicator channel and the relative position indicator channel for each CONTROL ROD and APSR to be OPERABLE. This changes the CTS by deleting the detail of the capability of the indicators "and capable of determining the control rod group average positions within +/- 1.5%" and relocating this detail to the UFSAR.

The removal of these details, which are related to system design, from the Technical Specifications is acceptable because this type of information is not necessary to be included in the Technical Specifications to provide adequate protection of public health and safety. The ITS still requires the absolute position indicator channel and the relative position indicator channel for each CONTROL Davis-Besse Page 4 of 10 Attachment 1, Volume 6, Rev. 1, Page 149 of 307

Attachment 1, Volume 6, Rev. 1, Page 150 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS ROD and APSR to be OPERABLE. Also, this change is acceptable because the removed information will be adequately controlled in the UFSAR. The UFSAR is controlled under 10 CFR 50.59 or 10 CFR 50.71(e), which ensures changes are properly evaluated. This change is designated as a less restrictive removal of detail change because information relating to system design is being removed from the Technical Specifications.

LA02 (Type 1 - Removing Details of System Design and System Description, Including Design Limits) CTS 3.1.3.3 Action a.2.a requires the position of the control rod to be verified with the 0%, 25%, 50%, 75%, or 100% position reference indicator channels and CTS 3.1.3.3 Action a.2.b requires the position of the control rod to be maintained at the 0%, 25%, 50%, 75%, or 100% position reference indicator positions. ITS 3.1.7 Required Actions B.1.1 requires actuation of the affected rod's zone reference indicators and ITS 3.1.7 Required Action B.1.2 requires the rods to be maintained at the zone reference indicator position, but the details of where the rod's zone reference indicators are located (i.e., 0%, 25%, 50%, 75%,

or 100%) are moved to the Bases. This changes the CTS by removing details of what constitutes an OPERABLE system to the Bases.

The removal of these details, which are related to the system design capabilities, from the Technical Specifications is acceptable because this type of information is not necessary to be included in the Technical Specifications to provide adequate protection of public health and safety. The ITS still retains the requirement to actuate the affected rod's zone reference indicators and to maintain the control rod at the zone reference indicator position. The details on the location of the rod's zone reference indicators do not need to appear in the specification in order for the requirement to apply. Also, this change is acceptable because the removed information will be adequately controlled in the ITS Bases. Changes to the Bases are controlled by the Technical Specification Bases Control Program in Chapter 5. This program provides for the evaluation of changes to ensure the Bases are properly controlled. This change is designated as a less restrictive removal of detail change because information relating to system design is being removed from the Technical Specifications.

LA03 (Type 5 - Removal of Cycle-Specific ParameterLimits from the Technical Specifications to the Core OperatingLimits Report) CTS 4.1.3.3 requires each absolute and relative position indicator to be determined OPERABLE by verifying that the relative position indicator channels and the absolute position indicator channels agree within "3.46%." ITS SR 3.1.7.1 requires the verification that the absolute position indicator channels and the relative position indicator channels agree within the limit specified in the COLR. This changes the CTS by relocating the agreement criteria, which must be confirmed on a cycle-specific basis, to the COLR.

The removal of these cycle-specific parameter limits from the Technical Specifications to the COLR is acceptable because the cycle-specific limits are developed or utilized under NRC-approved methodologies which will ensure that the Safety Limits are met. The NRC documented in Generic Letter 88-16, "Removal of Cycle-Specific Parameter Limits From Technical Specifications,"

that this type of information is not necessary to be included in the Technical Specifications to provide adequate protection of public health and safety. The ITS Davis-Besse Page 5 of 10 Attachment 1, Volume 6, Rev. 1, Page 150 of 307

Attachment 1, Volume 6, Rev. 1, Page 151 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS still retains the requirement to verify that the absolute position indicator channels and the relative position indicator channels agree within the limit. The methodologies used to develop the parameters in the COLR have obtained prior approval by the NRC in accordance with Generic Letter 88-16. Also, this change is acceptable because the removed information will be adequately controlled in the COLR under the requirements provided in ITS 5.6.3, "CORE OPERATING LIMITS REPORT." ITS 5.6.3 ensures that the applicable limits (e.g., fuel thermal mechanical limits, core thermal hydraulic limits, Emergency Core Cooling Systems limits, and nuclear limits such as SDM, transient analysis limits, and accident analysis limits) of the safety analyses are met. This change is designated as a less restrictive removal of detail change because information relating to cycle-specific parameter limits is being removed from the Technical Specifications.

LESS RESTRICTIVE CHANGES L01 (Category 4 - Relaxation of Required Action) CTS 3.1.3.3 Action a covers the inoperabilities for a maximum of one absolute position indicator channel per control rod group or one relative position indicator channel per control rod group.

CTS 3.1.3.3 Action b covers the inoperabilities for more than one relative position indicator channel per control rod group. ITS 3.1.7 ACTIONS are modified by a Note that states "Separate Condition entry is allowed for each inoperable position indicator channel." ITS ACTION A covers inoperabilities for the relative position indicator channels for one or more rods and ITS ACTION B covers inoperabilities for the absolute position indicator channels for one or more rods. ITS ACTION C covers the inoperabilities for absolute position indicator channel and relative position indicator channels for one or more rods. This changes the CTS by allowing separate Condition entry for each inoperable absolute position indicator channel and relative position indicator.

The purpose of CTS 3.1.3.3 Action a is to provide compensatory actions for a maximum of one absolute position indicator channel per control rod group or one relative position indicator channel per control rod group while the purpose of CTS 3.1.3.3 Action b is to provide compensatory actions for more than one relative position indicator channel per control rod group. This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the OPERABLE status of the redundant systems or features. This includes the capacity and capability of remaining systems or features, a reasonable time for repairs or replacement, and the low probability of a DBA occurring during the repair period. This change will allow separate Condition entry for both the relative and absolute inoperable position indicator channels while the CTS only allows this for inoperable relative position indicator channels. The ITS will allow each inoperable relative or absolute rod position indication inoperability to be tracked separately. This change is acceptable because the Required Actions for each Condition provide appropriate compensatory actions for each inoperable position indicator. This Davis-Besse Page 6 of 10 Attachment 1, Volume 6, Rev. 1, Page 151 of 307

Attachment 1, Volume 6, Rev. 1, Page 152 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

L02 (Category 4- Relaxation of Required Action) CTS 3.1.3.3 Action a, in part, covers the inoperabilities for a maximum of one relative position indicator channel per control rod group. CTS 3.1.3.3 Action a.2 provides an action that allows operation to continue provided the position of the control rod with the inoperable position indicator is verified within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months by actuating one of the position reference indicators, the control rod group(s) containing the inoperable position indicator channel is verified to be maintained at the position reference indicators at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , and operation is within the limits provided in Specification 3.1.3.5 (Safety Rod Insertion Limit), Specification 3.1.3.6 (Regulating Rod Insertion Limits), and Specification 3.1.3.9 (Axial Power Shaping Rod Insertion Limits). CTS 3.1.3.3 Action b covers the inoperabilities for more than one relative position indicator channel per control rod group and requires the application of CTS 3.1.3.3 Action a.1 or a.2 and verification that the absolute position indicators channels for the affected control rod assemblies are OPERABLE. ITS 3.1.7 ACTION A covers inoperabilities for the relative position indicator channels for one or more rods and it requires the determination that the absolute position indicator channel for the rod(s) is OPERABLE. This changes the CTS by replacing the CTS 3.1.3.3 Action a.2 requirements for the inoperable relative position indicator channels and replacing it with a Required Action to determine the absolute position indicator channel for the rod(s) is OPERABLE consistent with the requirements in CTS 3.1.3.3 Action b.

The purpose of CTS 3.1.3.3 Action a.2, in part, is to provide compensatory actions for a maximum of one inoperable relative rod position indicator channel per group while the purpose of CTS 3.1.3.3 Action b is to provide compensatory actions for more than one relative position indicator channel per control rod group. This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the OPERABLE status of the redundant systems or features. This includes the capacity and capability of remaining systems or features, a reasonable time for repairs or replacement, and the low probability of a DBA occurring during the repair period.

This replaces the CTS 3.1.3.3 Action a.2 requirements for the inoperable relative position indicator channels with a Required Action to determine the absolute position indicator channel for the rod(s) is OPERABLE consistent with the requirements in CTS 3.1.3.3 Action b. If the relative position indicator channel is inoperable for one or more rods, the position of the rod(s) is still monitored by the absolute position indicator channel for each affected rod. The absolute position indicator channel may be used if it is determined to be OPERABLE. This change is acceptable because the Required Action provide appropriate compensatory actions for each inoperable relative position indicator. This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

Davis-Besse Page 7 of 10 Attachment 1, Volume 6, Rev. 1, Page 152 of 307

Attachment 1, Volume 6, Rev. 1, Page 153 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS L03 (Category4 - Relaxation of Required Action) ITS 3.1.7 ACTION B covers inoperabilities associated with the absolute position indicator channel for one or more rods. ITS 3.1.7 Required Action B.2.1 requires the control groups with nonindicating rods to be placed under manual control within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months and ITS 3.1.7 Required Action B.2.2 requires the determination of the position of the noninidicating rods indirectly with fixed incore instrumentation within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter, and 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months after motion of nonindicating rods which exceeds 11% in one direction since the last determination of the rod's position (Not applicable during the first 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months period). This changes the CTS by providing alternative Required Actions when an absolute position indicator channel is inoperable for one or more rods.

The purpose of ITS 3.1.7 Required Action B.2.1 and B.2.2 is to monitor and control the movement of rods associated with inoperable absolute position indicators. This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the OPERABLE status of the redundant systems or features. This includes the capacity and capability of remaining systems or features, a reasonable time for repairs or replacement, and the low probability of a DBA occurring during the repair period.

This change provides alternative compensatory actions when an absolute position indicator channel is inoperable for one or more rods. If the absolute position indicator is inoperable for one or more rods, the position of the rod is monitored by the relative position indicator channel for each affected rod.

However, the relative position indicator channel is not as reliable a method of monitoring rod position as the absolute position indicator because it counts electrical pulse steps. The fixed incore system can be used to indirectly determine the absolute position of the affected rod. The fixed incore instrumentation can provide a continual update of CONTROL ROD position, therefore this method can be used to allow continued operation of the reactor with a manual rod movement, while maintaining verification of rod insertion and alignment. Required Action B.2.1 restricts rod motion by placing the groups with nonindicating rods in manual control; thus, even if the rod fails to move in alignment with the group, misalignment is limited. The required Completion Time of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months provides the operator adequate time for placing the rods in manual control, and is consistent with the required Completion Time for Required Action B.1.1. If the rod is out of position during this 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months period, the simultaneous occurrence of an event sensitive to the rod position has a small probability. Continuing to verify the rod positions every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months is reasonable for ensuring that rod alignment and insertion are not changing, and provides the operator adequate time to correct any deviation that may occur. The additional Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months after motion of nonindicating rods, which exceeds 11% in one direction since the last determination of the rod's position, ensures that the rod with inoperable position indication will not be misaligned for a significant period of time, in the event the rod is moved. The specified Completion Times are acceptable because the simultaneous occurrence of a mispositioned rod and an event sensitive to the rod position has a small probability. This change is acceptable because the Required Actions provide

appropriate compensatory actions for inoperable absolute position indicators.

Davis-Besse Page 8 of 10 Attachment 1, Volume 6, Rev. 1, Page 153 of 307

Attachment 1, Volume 6, Rev. 1, Page 154 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

L04 (Category 4 - Relaxation of Required Action) CTS 3.1.3.3 does not contain an Action to follow ifthe provided Actions cannot be met and does not provide an Action to follow with both absolute and relative position indicator channels inoperable for one or more rods. Therefore, CTS 3.0.3 would be entered, which would allow 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months to initiate a shutdown and to be in HOT STANDBY within 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months . ITS 3.1.7 contains ACTION C that requires the plant to immediately declare the rod(s) inoperable. For AXIAL POWER SHAPING RODs this will require entry into ITS 3.1.6 ACTION A and the plant is required to perform SR 3.2.3.1 (the verification of AXIAL POWER IMBALANCE) within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after each APSR movement. This changes the CTS by eliminating the requirement to enter CTS 3.0.3 and commence a plant shutdown.

The purpose of ITS 3.1.7 ACTION C is to provide the appropriate default action for inoperable rod position indication channel(s) associated with AXIAL POWER SHAPING RODs. This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the OPERABLE status of the redundant systems or features. This includes the capacity and capability of remaining systems or features, a reasonable time for repairs or replacement, and the low probability of a DBA occurring during the repair period. This change eliminates the requirement to enter CTS 3.0.3 and commence a plant shutdown. CTS 3.1.3.3 does not contain an Action to follow if the provided Actions cannot be met and does not provide an Action to follow with both absolute and relative position indicator channels inoperable for one or more AXIAL POWER SHAPING RODS. ITS 3.1.7 contains ACTION C that requires the plant to immediately declare the rod(s) inoperable.

This will require entry into ITS 3.1.6 ACTION A and the plant is required to perform SR 3.2.3.1 (the verification of AXIAL POWER IMBALANCE) within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after each APSR movement. Verification of the AXIAL POWER IMBALANCE after APSR movement ensures the movement of the APSR group has not resulted in violation of the AXIAL POWER IMBALANCE limit, if the APSR was misaligned. This change is designated as less restrictive because additional time is allowed to operate in MODES 1 and 2 with inoperable APSR position indication channels than in the CTS.

L05 (Category 7- Relaxation Of Surveillance Frequency - Non-24 Month Type Change) CTS 4.1.3.3 requires each absolute and relative position indicator channel to be determined to be OPERABLE by verifying that the relative position indicator channels and the absolute position indicator channels agree at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . However, if the asymmetric rod monitor is inoperable, then a comparison of the relative position indicator and absolute position indicator channel(s) of the rod(s) with the inoperable asymmetric rod monitor must be performed at least once per 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . ITS SR 3.1.7.1 requires the verification that the absolute position indicator channels and the relative position indicator channels agree within the limit every 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . This changes the CTS by Davis-Besse Page 9 of 10 Attachment 1, Volume 6, Rev. 1, Page 154 of 307

Attachment 1, Volume 6, Rev. 1, Page 155 of 307 DISCUSSION OF CHANGES ITS 3.1.7, POSITION INDICATOR CHANNELS eliminating the requirement to verify the individual control rod positions to be within limit every 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months when the asymmetric rod monitor is inoperable.

The purpose of CTS 4.1.3.3 is to periodically verify that the rods are within the position agreement criteria. This change is acceptable because increasing the Frequency of rod position agreement verification when the asymmetric rod monitor is inoperable is unnecessary, since an inoperability of the monitor does not increase the probability that the position channels are not within the agreement criteria. The routine 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Frequency (ITS SR 3.1.7.1) continues to ensure the control rods are within the agreement criterion. Furthermore, the asymmetric rod monitor is for indication only. Its use is not credited in any safety analyses. Thus, any response determined necessary by plant personnel due to an inoperable alarm is more appropriately controlled by plant procedures, not Technical Specifications. This change is designated as less restrictive because Surveillances will be performed less frequently under the ITS than under the CTS.

Davis-Besse Page 10 of 10 Attachment 1, Volume 6, Rev. 1, Page 155 of 307

Attachment 1, Volume 6, Rev. 1, Page 156 of 307 Improved Standard Technical Specifications (ISTS) Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 156 of 307

Attachment 1, Volume 6, Rev. 1, Page 157 of 307 Position Indicator Channels 3.1.7 CTS 3.1 REACTIVITYtCONTROL SYSTEMS 3.1.7 Position Indicator Channels 3.1.3.3 LCO 3.1.7 the absolute p, sition. indicato)rdhannel and the relative position in dicator, channel for each CONTROL ROD and APSR shall be OPERABLE.

APPLICABILITY: MODES 1 and;2.

ACTIONS

NO TE -----------------------------------------------------------

S-----

3.1.3.3 Separate Condition entry is allowed for each inoperable position indicator channel.

Action a, m------------- ------- m-ý----- 6-------------------- -------------------- m----------------, ------ ---------------------

3.1.3.3 Action b, DOC L01 CONDITION REQUIRED ACTION COMPLETION TIME DOC L02, A. The relative position A.1 Determine the absolute 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 3.1.3.3 Action b indicator channel position indicator channel I inoperable for one or more rods.

for the rod(s) is OPERABLE.

AND Once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter 3133 3.1.3.3 B. The absolute position B.1.1 Determine position of the 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months Action a.2 indicator channel rods with inoperable inoperable for .one or absolute position indicator more rods. by actuating the affected rod's zone position reference indicators.

AND BWOG STS 3.1.7-1 Rev. 3.0, 03131104 Attachment 1, Volume 6, Rev. 1, Page 157 of 307

Attachment 1, Volume 6, Rev. 1, Page 158 of 307 Position lhdicatorChannels 3.1.7 0

CTS ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME 3.1.3.3 Action a.2.b), B.1.2 Determine, rods with 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

3.1.3.3 Action a.2.c) inoperable position indicators are maintained at AND the zone reference indicator position and within the Once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months limits specified in thereafter LCO 3.1.5, "Safety Rod Insertion Limit," LCO3.2.1, "Regulating Rod Insertion Limits," or LCO 3.2.2, "AXIAL POWER SHAPING ROD (APSR), Insertion Limits," as applicable.

OR DOC L03 B.2.1 Place the controigroups 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months with nonindicating rods under manual control.

AND BWOG STS 3.1.7-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 158 of 307

Attachment 1, Volume 6, Rev. 1, Page 159 of 307 Position Indicator Channels 3.1.7 CTS ACTIONS .(continued)

.CONDITION REQUIRED ACTION COMPLETION TIME DOC L03 B.2.2 Determine the position of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months the nonindicating rods indirectly with fixed incore AND instrumentation.

Once per8 hours thereafter AND

NOTE-Not applicable during first 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months period 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months after motion of nonindicating rods, 11% which exceeds

, C sin one,

,,direction since the 0 last determination, of the rod's position DOC M05, C. The absolute position C.1 Declare the rod(s)ý Immediately 0 DOC L04 indicator channel and inoperable.

the relative position indicator channel

\ noperable for one or more rods.

Required Action and associated Completio Tim not met.

BVWOG STS 3.1.7-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 159 of 307

Attachment 1, Volume 6, Rev. 1, Page 160 of 307 Position Indicator Channels SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY 4.1.3.3 S R 3.1:.-7.1 Verify the absolute: position indicatortchannels, and 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months the relative position indicator'channels agreeý within the. limit specified in :the COLR.

BWOG STS 3.1.7-4 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 160 of 307

Attachment 1, Volume 6, Rev. 1, Page 161 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.7, POSITION INDICATOR CHANNELS

1. The brackets have been removed and the proper plant specific information/value has been provided.

2. This correction has been made consistent with the Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 4.1.6.b and 4.1.6.i.5.v.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 161 of 307

Attachment 1, Volume 6, Rev. 1, Page 162 of 307 Improved Standard Technical Specifications (ISTS) Bases Markup and Justification for Deviations (JFDs) 0 Attachment 1, Volume 6, Rev. 1, Page 162 of 307

Attachment 1, Volume 6, Rev. 1, Page 163 of 307 Position Indicator Channels.

B 3.1.7 B'3.1 REACTIVITY:CONTROL SYSTEMS B 3.1.7 Position Indicator Channels.

BASES SUFSAR, Appendix 3D.

1.9 BACKGROUND

AccordingtojI: 1(Ref. 1),*instrumentation to monitor variables and systems over their operating ranges during normal operation,. anticipated 0) operational occurrences, and accident conditions must be OPERABLE.

LCO 3.1.7 is required to ensure OPERABILITY of the CONTROL ROD and APSR position indicators, and thereby ensure compliance with the CONTROL.ROD and APSR alignment and insertion limits.

The OPERABILITY, including position indication, of the safety and regulating rods is an initial condition assumption in all safety. analyses that assume rod insertion upon reactor trip. Maximum rod misalignment for the safety rods, regulating.rods, and APS.Rs is assumed in the safety.

analysis, which :directly affect core power distributions and assumptions of availableSDM.

Mechanical or electrical failures may cause a CONTROL ROD or APSR to become. misaligned from its group. CONTROL ROD or APSR misalignment may cause increased power peaking, due to the asymmetric reactivity distribution and a reduction in thetotal available rod worth for reactor shutdown. Therefore, CONTROL ROD and APSR alignment are related to core operation within design power peaking limits and the core design requirement of a minimum SDM. Rod position indication is'needed to assess rod OPERABILITY and alignment.

Limitson CONTROL ROD alignment, APSR alignment, and safety rod position have been established, and all rod positions are. monitored and controlled during, power operation to ensure that the power distribution and reactivity limits defined by the design power peaking and SDM limits

-are preserved.

is essentially fully Two methods of CONTROL ROD and APSR position indication are redundant consisting of lprovided in the N .L RK Drive, Control System. The two means two independent voltage are by absolute position indicator and relative position-indicator ddran eucer w.The absolute position indicator stsofaaranucecon series of mqgnetically operated reed switches mounted in a tube parallel to thelCOlROLI drive mechanism (CRDM) motor tube extension.

0 Switch contacts/close when a permanent magnet mounted on the upper end of the[ COIROL[ assembly (CRA) leadscrewextension comes near. As the leadscrew]and CRA move,:the switches operate BWOG STS B 3.1.7-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 163 of 307

Attachment 1, Volume 6, Rev. 1, Page 164 of 307 This analog voltage consists of two output channels that are averaged and I Position IndicatorChannels buffered by the analog position indicator amplifier to form a single compositeI .. 7 analog position indicator signal. Incorporating isolation switches at the input B 3.17 to the analog position indicator amplifier allows either of the independent l position indication circuits to be totally isolated from the other circuit in the event either circuit should fail.

BASES BACKGROUND (continued) sequentially, producing an analog voltage proportional to position. Other reed .switches included in the same tubewith .the.position indicator matrix 0

provide full in and full out limit indications, and absolute, position indications at 0%, 25%, 50%,1 75%, and 100% travel.(called, zone reference indicators). The relative position indicator ran ucerisa s 0 potentiometer, driven by.a step motor that produces a signal proportional to. CONTROL ROD position, based on the electrical pulse steps thatdrive the CRDM.

Two abolute position indica1 or channel designs: ma be used in the unit:

type A *bsolute position indi ators and type A-R4C asolute position indicato s. The type A absol te position indicator tra sducer is a voltage divider made up of 48 esistors of equal value onnectedin series.

1ircuit One en of 48 reed switches is connectedat a junctio between each of

.the resis ors, so that as the gnet mounted on the le dscrew moves, either on or two reed switch s are closed in the vicini y of the magnet.

The type A-R4C (redundant f ur channel) absolute po ition indicator transduc r has two parallel se ssof voltage dividercircuits made up .of 36 resist rs each, connected i series (channels A and B). One end of 36 reed s itches is connected t a junction. between ea h of the resistors of the two parallel circuits. Th reed switches making u .each circuit are offset, suc that the switches f r channel A are stagger-d with the switches f r channel B. The ty e A-R4C is designed su hthat either two or three re d switches are cls d in the vicinity of the gnet. By its design, the type A-R4C abs~olut position indicatorprovi es redundancy.,

with the tw three sequence of ickup and drop out of re d switches to enable a co tinuity of position si nal when a single reed witch fails..t0 indicators close. on a control panel C N ROL

position indicating readout devices located in the control room consist of single CRA position merson awallmunted position ind-icationrpanel and four group average position meters on the console.

A selector switch permits either relative or absolute position indication to be displayed on all of the single rod meters. Indicator lights are provided F on the single CRA meter panel to indicate when each CRA is fully ithdrawn, fully inserted,nabled,l or trabsferred] and Whether a CRA position asymmetry alarm condition is present. Indicators on the~console show full insertion, full withdrawal, and~enabled for motion for each ICOIROLIII* group. Identical instrumentation and devices exist for the APSR group. The consequence of continued operation with an inoperable absolute position indicator or relative positipn indicator channel is a decreased reliability in determining rON!/ROIFR-. position.

Therefore, the potential for operation in violation of design peaking factors or SDM is increased.

BVVOG STS B 3.1.7-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 164 of 307

Attachment 1, Volume 6, Rev. 1, Page 165 of 307 Position Indicator Channels B 3.1.7 BASES APPLICABLE. CONTROL ROD and APSR position accuracy.is. essential during power SAFETY operation. Power peaking, ejected rod worth,.or S.DM limits may be ANALYSES violated in the event of a Design Basis Accident (Ref. 2) with-CONTROL RODS.or APSRs-operat.ing outside their limits undetected. Regulating rod, safety rod, and APSR positions must be known in order to verify the core is operating within the group sequence,.overlapi design peaking limits, ejected rod worth, and with minimum SDM (LCO 3.1.5, "Safety Rod Insertion Limits," LCO 3.2.1, "Regulating Rod Insertion Limits," and LCO 3.2.2, "AXIAL POWER SHAPING ROD (APSR) Insertion Limits").

The rod positions must also be known in order to verify the alignment limits are preserved (LCO 3.1 .4, "CONTROL ROD Group Alignment Limits," and LCO 3.1.6, "AXIAL POWER SHAPING ROD (APSR)

Alignment Limits"). CONTROL ROD and APSR positions are continuously monitored to provide operators with information that-ensures

,the plant is operating within the bounds of the accident analysis assumptions. The CO0 ROL R position indicator channels satisfy Criterion 2 of 10 CFR 50.36c)(0)i. The COO ROIJ RMD position indicators monitor COI-ROL IR condition.

R position, wh ich is an accident initial -0 0 LCO LCO 3.1.7 specifies that one absolute position -indicator channel and one relative position indicator channel be OPERABLE for each CONTROL ROD and APSR.

The agreement between the relative position indicator channel and the absolute position indicator channel, within the limit given inthe COLR, indicates .that relative position indicators are adequately calibrated and can be used for indication of.the measurement of CONTROL ROD group position. A deviation of less than the allowable limit, given in the COLR, in position indication for a single CONTROL ROD or APSR, ensures confidence that the position uncertainty of the corresponding CONTROL ROD group or APSR group is within the assumed values used in the analysis that specifies CONTROLrROD group and APSR insertion limits.

anASR These requirements ensure .that CONTROL ROD position indication during poweroperation and PHYSICS TESTS is accurate, and that 0

design assumptions are not challenged. OPERABILITY of the position indicator channels ensures that inoperable, misaligned, or mispositioned CONTROL RODS or APSRs can be detected. Therefore, power peaking and SDM can be controlled within acceptable limits.

BWOG STS B 3.1.7-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 165 of 307

Attachment 1, Volume 6, Rev. 1, Page 166 of 307 Position IndicatorChannels, B 3.1.7 BASES APPLICABILITY In: MODES 1 and 2, OPERABILITY of position indicator channels is

'require~d, since the reactor is, or is capable of, generating THERMAL

.POWER in these MODES. In MODES 3, 4, 5, and 6, Applicability is not requir ed because the reactor is shut down with the required minimum SDM and is not generating THERMAL POWER.

ACTION S A.1 If.the relative position indicator channel is inoperable for one or more rods, the position of the rod(s) is still monitored by the absolute position indicator channel for each affected rod. The absolute position indicator channel may be used if it is determined to be OPERABLE. The required Completion Time of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . is reasonable to provide adequate time for

the operatorfto determine position indicator channel status. Continuing the verification every.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter in the applicable condition is acceptable, based on the fact that during, normal power operation excessive.movement of'the groups is not required. Also, if the rod is out of position during this 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months period, the simultaneous occurrence of an event sensitive to the-rod position has a small probability.

B1.. - - and B.1.2 0

If the absolute position indicator channel is inoperable for one or more 01 rods, the. position of the rod(s) is monitored by the relative position indicator channel for each affected rod. However, the relative position indicator channel is not as reliable a method of monitoring rod position as the absolute position indicator because it counts electrical pulse steps

.driVing the CRDM motor rather than actuating a switch located at a known elevation. Therefore, the affected rod's position can be determined with more certainty by actuating one of its zone reference indicator switches (Required Action 8.1.1) located at discrete elevations# The required Completion Time of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months provides the operator adequate time for adjustingthe affected rod's position to anappropriate zone reference indicator location. If the rod is out of positionduring .this 8.hour period, the simultaneous occurrence.of an event sensitive to the rod.position has a small probability.

Required Action 8.1.2 requires To allow continued operation the rods with inoperable absolute position 0

I tob indicator channels-g maintained at the zone reference indicator mEl position. In addition, the affected rods-M maintained within the limits of LCO 3.1;5 (when the affected rod is a safety rod), LCO 3.2.1 (when the affected rod is.a regulating rod), or LCO 3.2.2 (when the affected rod is BWOG STS B 3.1.7-4 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 166 of 307

Attachment 1, Volume 6, Rev. 1, Page 167 of 307 Position Indicator Channels B 3.1.7

. BASES ACTIONS (continued) an APSR). This Required Action :ensures safety rods remain fully withdrawn, and that regulating rods and APSRs remain aligned within their insertion limits. The required Completion Time of8 hours is reasonable.for, allowing the operator adequate time to determine the taffected 'rods are in :6mpliance withthese LCOs. Continuing to verify the rod .positions every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter is reasonable for ensuring that rod alignment and insertion are not changing, and provides the operator adequate time to correct any deviation that may occur. Continuing the verification every 8hours thereafter in the applicable condition is acceptable, based-on the fact that dur-ing normal power operation

excessive movement:of the groups is-not required. Also, ifthe rod is out of position during this 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months period, :the simultaneous occurrence of an

.event sensitive to the rod position has a small probability.

.urrently Note: Davis-Besse does not have the computer software I installed to allow use of the fixed incore instrumentation, as described B.2.1 Sbelow. Therefore, before this option lis used, the proper software must be If 'the absolute position indicator is inoperable for one or more rods, the

.i~nstalled. , ,position of the rod is monitored by the relative position indicator channel for each affected rod. However, the relative position indicator channel is Thrfoe Required Actions B,2,1 "

not as reliable a method.of monitoring rod position as the absolute and B.2.2 provide the option to /

irndirectly determine the position of the* position indicatorbecause it counts electrical pulse steps.- The fixed incore system can be used to indirectly determine the absolute position of 0

the, affected rod The fixed incore instrumentation can provide a continual Update 'of ON ROL position, therefore this method can be used to allow continued operation of the reactor with a manual CONTROL ROD 0

movement, while maintaining verification ýof gCO RLI D insertion and alignment. Required Action B*2.1 8 restricts rod motion by placing the groups with nonindicating rods in manual control; thus, even if the rod fails to move in alignment with the group, misalignment is limited. The required: Completion Time of 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months provides the operator adequate time for placing the rods in manual control, and is consistent with the required Completion Time for Required Action B.11.1. If the rod is out of position during this 8.hour period,,the simultaneous occurrence of an event sensitive to the rod position has a small probability.

BWOG STS B 3.1.7-5 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 167 of 307

Attachment 1, Volume 6, Rev. 1, Page 168 of 307 Position Indicator Channels B 3.1 .7

. BASES' ACTIONS (continued)

(Required ActiOn 3.2.2)

Continuing to verify the -rodpositioins every, 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months is reasonablelfor ensuring that rod alignment and insertion are not changing; and provides the operator adequate time to correc"tany deviation that may occur. The 1 additional Completion Time of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months after motion of nonindicating rods, which exceeds 1 c in one direction since the last'determinationof the rod's position, ensures that the rod with inoperable positio.n indication will not be misaligned for a significant period of time, in the event the rod ismroved. The.specified Completion Times are acceptable because the:

simultaneous occurrence of a mispositioned rod and an eventzsensitiveto the rod position has a small probabilit..

C.i o

n

,7jS both position indicator, channel and, r~elative pesition d"icator channel.are inoperable for one or more rods, r f e equired ActionE and associated Completion Time1ia e .ot met/the position of the rod(s) is not known With certainty. Therefore, each, affected rod must be ,i declared inoperable, and the limits of LCO 3.1.4 or LCO 3.1.6 apply. The required..Completio.n Timejfor declaring-the rod(s) inoperable is immediately. Therefore LCO 3.1.4 or LCO"3.1.6 is entered immediately,.

and the required Completion Times for the appropriate: Required Actions in those LCOs apply without delay' SURVEILLANCE SR 3.1.7.1 REQUIREMENTS Verification is required that the Absolute Position Indicator channels and Relative Position Indicator channels agree within the limit given in the COLR. This verification ensures that the Relative .Position Indicator channels, which.are regarded as the potentially: less reliable means of position indication, remain OPERABLE and accurate. The required Frequency of 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is.adequate for verifying that no degradation in system OPERABILITY has occurred.

O BWDG STS B 3.1.7-6 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 168 of 307

Attachment 1, Volume 6, Rev. 1, Page 169 of 307 Position Indidator Channels B 3.1.7 D A C' MC J UFSAR, Appendix 3D.1.9, Criterion 13 - Instrumentation and Control I REFERENCES 1. 10 1 aR50. ApendixA DC 1 UFSASection15.

0

2. FSAR, ection [14.1.2,2 ,Section [14.1.23],

Section [e4.1.2.71, Section 4.2.2.4], "andSectio, [14.2.2.5].

ction [14.1.2.6], 0 BWOG STS B 3.1.7-7 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 169 of 307

Attachment 1, Volume 6, Rev. 1, Page 170 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.7 BASES, POSITION INDICATOR CHANNELS

1. Changes are made (additions, deletions, and/or changes) to the ISTS Bases which reflect the plant specific nomenclature, number, reference, system description, analysis, or licensing basis description.

2. Typographical error corrected.

3. Changes have been made to be consistent with changes made to the Specification.

4. Davis-Besse was designed and under construction prior to the promulgation of 10 CFR 50, Appendix A. The design of Davis-Besse meets the intent of 10 CFR 50, Appendix A published in the Federal Register on February 20, 1971, and as amended in Federal Register on July 7, 1971. Bases references to the 10 CFR 50, Appendix A criteria have been replaced with references to the appropriate section of the UFSAR.

5. Changes are made to be consistent with the Specification requirements.

6. Changes have been made for clarity. Required Actions B.1.1 and B.1.2 provide one option, while Required Actions B.2.1 and B 2.2 provide a second option. Therefore, the Bases discussions of each option have been combined into one discussion.

0 Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev.- 1, Page 170 of 307

Attachment 1, Volume 6, Rev. 1, Page 171 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 171 of 307

Attachment 1, Volume 6, Rev. 1, Page 172 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS ITS 3.1.7, POSITION INDICATOR CHANNELS There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 172 of 307

Attachment 1, Volume 6, Rev. 1, Page 173 of 307 ATTACHMENT 8 ITS 3.1.8, PHYSICS TESTS EXCEPTIONS - MODE 1 Attachment 1, Volume 6, Rev. 1, Page 173 of 307

, Volume 6, Rev. 1, Page 174 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs) , Volume 6, Rev. 1, Page 174 of 307

Attachment 1, Volume 6, Rev. 1, Page 175 of 307 ITS 3.1.8 ITS 3/4*.10 SPECIAL TEST EXCEPTIONS GROUPlHEIGh', INSERTION AND POWER DISTRIBUTION LIMITS M05 LIMITING CONDITION FOR OPERATION LCO3.1.8 3.10.1 The group height, insertion and power distribueionlimits of Specifications 3.1.3.1,.3.1.3.2, 3.1.3.5, 3.13.6 F31.. 3.1.3.9, 3.2.1 and 3.2.4 may be suspended during the performance of PHYSICS TESTS provided:

a. The THERMIAL POWER is maintained < 85% of RATED THERMAL POWER, Add proposed

b. The High Flux Trip Setpoint is < 10% of RATED THERMAL POoWE higher than the THERMAL POWER at which the test is performed, part c. L0 with a maximum setting of 90% of RATED THERMAL POWER, and

c. The limits of Specifications 3.2.2 and 3.2.3 are maintained and determined at the frequencies specified in 4-10.1.2 below. .

APP'LICABILITY:

ILITY: MODE MOD 1. Add proposed LCO 3.1.8 part d ACTION 8 With any of the limits of Specifications 3.2.2 or 3.2.3 being exceeded while the requirements .of Specifications 3.1.3.1, 3.1.3.2, 3.1.3.5, 3.1.3.6,3.1.3.7, 3.1.3.9, 3.2.1 or 3.2.4 are suspended, either:

SeduceILLAMCE

a. WEd Cofditioients thro saticse Re ACTIOn req.ir-s* . urei n of Speci3..2 ications '4.2. and.

b.e Bemins atpeifiedTADB within prio hours. toec 6 ntaio fada 01 dd*dCodtop

ELAC prs1trough4sed

... Requied Ation BR.182}L 4;10.1..2 4The Hu vigh lluxT r eqip ementpsh l Sp be ei iterioned to . abd wi hinM0 set SIR3.1.8.3 shall be performed at least once per two hours during PHYSICS TESTS.

'*[Add proposed SR 3.1.8.1 and SR 3.1 .8.4M0 DAVIS-BESSE, UNIT 1 3/4 10-1 Amendment No. 33 0 Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 175 of 307

Attachment 1, Volume 6, Rev. 1, Page 176 of 307 ITS 3.1.8 ITS 3/4.1 REACTIVITY CONTROL SYSTEMS 3/4 1 1 RORATION CONTROL SHUTDOWN MARGIN LIMITING CONDITION FOR OPERATION LCO 3.1.8.d 3.1.1.1 The SHUTDOWN MARGIN shall APPLICABILITY: MODES 1,2 , 3", 4 and 5.

ACTION:

ACTION A With the SHUTDOWN MARGIN I Iat > 25 gp)m5F'7T7_5 MARGIN is restored.

SURVEILLANCE REQUIREMENTS See

,I

TS 3.1.1 /

[4.1..1.1 The SHUTDOWN MARGIN shall be determin'ed to be > 1% Ak/k - -and

" LITS 3.2.1_]

a. Within one hour after detection of an inoperable control rod(s) and at least once ---- I S per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod s) is inoperable If the inoperable control rod .1-4 is immovable or untrippable, the above required SHUTDOWN MARGIN shall be increased by an amount at least equal to the withdrawn worth of the immovable or See untrippable control rod(s). I ITS 1.0 J

b. When in MODES I or 2#., at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , by verifying that regulating rod groups withdrawal is within the limits of Specification 3.1 .3.6.

See ITS 1

c. When in MODE 2## within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months prior to achieving reactor criticality by 3.2.1 ]

verifying that the predicted critical control rod position is within the limits of Specification 3.1.3.6.

d. Prior to initial operation above 5% RATED THERMAL POWER after each fuel loading by consideration of the factors of e. below, with the regulating rod groups S3e.1 j at the maximum insertion limit of Specification 3.1.3.6.

L.ITS See 3.1.1 and[

ITS 3.2.1 1 S ialTetExcetion t 3.1 0.4lV- See "See LCO 3.7.9, Steam Generator Level, for additional SIHUTDOWN MARGIN requirements. ITS 3.1.1 With kYr >l !.0 L

"WithkTff< 1.0 See21 ITS33.2.1 DAVIS-BESSE, UNIT I 3/4 1-1 Amendment No.--944-91, 276 0 Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 176 of 307

Attachment 1, Volume 6, Rev. 1, Page 177 of 307 DISCUSSION OF CHANGES ITS 3.1.8, PHYSICS TESTS EXCEPTIONS - MODE 1 ADMINISTRATIVE CHANGES A01 In the conversion of the Davis-Besse Current Technical Specifications (CTS) to the plant specific Improved Technical Specifications (ITS), certain changes (wording preferences, editorial changes, reformatting, revised numbering, etc.) are made to obtain consistency with NUREG-1430, Rev. 3.1, "Standard Technical Specifications-Babcock and Wilcox Plants" (ISTS).

These changes are designated as administrative changes and are acceptable because they do not result in technical changes to the CTS.

A02 CTS 3.10.1 does not specify any requirements for SDM. CTS 3.1.1.1 requires SDM to be met in MODE 1. ITS LCO 3.1.8 part d requires SDM to be within limits specified in the COLR. This changes the CTS by adding the SDM requirements to the PHYSICS TEST Exception LCO.

This change is acceptable because the requirements have not changed.

CTS 3.1.1.1 requires SDM to met at all times in MODE 1. In the ITS, LCO 3.1.1 is not applicable in MODE 1 since compliance with LCO 3.1.5, "Safety Rod Insertion Limit," and LCO 3.2.1, "Regulating Rod Insertion Limits," ensures SDM is being met. This change is considered administrative because the technical requirements have not changed.

A03 CTS 3.10.1 allows the limitations of Specification 3.1.3.7 to be suspended during the performance of the PHYSICS TEST. ITS 3.1.8 does not include this specific allowance to suspend Specification 3.1.3.7 during the performance of the PHYSICS test.

This change is acceptable because the requirements have not changed.

CTS 3.1.3.7, Rod Program, requirements have been relocated to the TRM. The TRM will continue to allow the Rod Program requirements of CTS 3.1.3.7 to be suspended during the PHYSICS test. This change is considered administrative because the technical requirements have not changed.

MORE RESTRICTIVE CHANGES M01 CTS 3.10.1 Action specifies requirements for when Specification 3.2.2 (FQ) or Specification 3.2.3 (FA H)limits are exceeded and requires a reduction in THERMAL POWER sufficiently to satisfy the ACTION requirements of Specifications 3.2.2 and 3.2.3 or to be in at least MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

ITS 3.1.8 Required Action B.1 requires the PHYSICS TEST exception to be suspended within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . This changes the CTS by replacing the current Action with a requirement to suspend the PYSICS TESTS exceptions within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months .

The purpose of the CTS 3.10.1 Action is to place the plant in a safe condition when the limits are not met. Currently, the CTS 3.10.1 Action requires the reduction of THERMAL POWER or the placement of the unit in MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . The proposed Required Action requires the unit to suspend the PHYSICS TEST exception within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . Suspension of PHYSICS TESTS exceptions Davis-Besse Page 1 of 5 Attachment 1, Volume 6, Rev. 1, Page 177 of 307

Attachment 1, Volume 6, Rev. 1, Page 178 of 307 DISCUSSION OF CHANGES ITS 3.1.8, PHYSICS TESTS EXCEPTIONS - MODE 1 requires restoration of each of the applicable LCOs to within specification. The Completion Time to accomplish this has been reduced from "6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months " to "1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ,"

therefore the change is more restrictive. The change is acceptable and necessary because the initial conditions for the safety analysis are not being met.

This change is designated as more restrictive because it imposes additional restrictions not found in the CTS.

M02 CTS 3.10.1 does not provide any Actions for when the requirements of LCO 3.10.1.a (the THERMAL POWER limitation) or LCO 3.10.1.b (the High Flux Trip Setpoint limitation) are not met. ITS 3.1.8 includes ACTION B that, in part, includes a Condition to cover THERMAL POWER > 85% RTP, High Flux trip setpoint > 10% higher than PHYSICS TESTS power level, and High Flux trip setpoint > 90% RTP. ITS 3.1.8 Required Action B.1 requires the suspension of PHYSICS TESTS exception within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . This changes the CTS by imposing an additional requirement on the application of the test exception LCO.

The purpose of the ITS 3.1.8 Conditions and Required Action B.1 is to place the plant in a safe condition when the limits are not met. Currently, the CTS 3.10.1 Action does not provide any compensatory actions if the requirements of LCO 3.10.1.a (the THERMAL POWER limitation) or LCO 3.10.1.b (the High Flux Trip Setpoint limitation) are not met. Therefore, testing would be suspended and the LCOs that have been suspended would have to be restored to within limit.

The proposed Required Action requires the unit to suspend the PHYSICS TESTS exceptions within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . Suspension of PHYSICS TESTS exceptions requires restoration of each of the applicable LCOs to within specification. The Completion Time to accomplish this is "1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ," therefore the change is more restrictive. The change is acceptable and necessary because the initial conditions for the safety analysis are not being met. This change is designated as more restrictive because it imposes additional restrictions not found in the CTS.

M03 CTS 3.10.1.a requires THERMAL POWER to be maintained < 85% RTP, however there is no Surveillance Requirement associated with this requirement.

CTS 3.1.1.1 requires SHTUDOWN MARGIN to be within limit, however the only Surveillance Requirement in MODE 1 is to verify the regulating rod groups are within the insertion limits. ITS SR 3.1.8.1 requires a verification that THERMAL POWER is < 85% RTP every hour and ITS SR 3.1.8.4 requires SDM to be within limits every 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . This changes the CTS by adding two additional Surveillance Requirements.

This change is acceptable because the Surveillance Requirements are necessary to ensure the requirements of the LCO are being met. This change is designated as more restrictive because two new Surveillance Requirements are being added to the Technical Specifications.

M04 CTS 3.1.1.1 Action does not provide any specific requirements to suspend PHYSICS TESTS when SDM is not met. ITS 3.1.8 Required Action A.1 requires suspension of the PHYSICS TEST exception within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . This changes the CTS by imposing an additional requirement on the application of the test exception LCO.

Davis-Besse Page 2 of 5 Attachment 1, Volume 6, Rev. 1, Page 178 of 307

Attachment 1, Volume 6, Rev. 1, Page 179 of 307 DISCUSSION OF CHANGES ITS 3.1.8, PHYSICS TESTS EXCEPTIONS - MODE 1 This change is acceptable because it imposes reasonable restrictions on the performance of PHYSICS TESTS when SDM is not met. The Bases for ITS 3.1.1, "SHUTDOWN MARGIN (SDM)," states that in MODE 1, the SDM is ensured by compliance with the rod insertion limit Specifications (LCO 3.1.5 and LCO 3.2.1). Under the test exception, those control rod insertion limits are allowed to be violated. Therefore, additional actions must be taken to ensure that sufficient SHUTDOWN MARGIN is available to shutdown the reactor and keep it subcritical if needed when in MODE 1. This change is designated as more restrictive because it imposes additional restrictions not found in the CTS.

M05 CTS 3.10.1 allows the requirements of Specification 3.1.3.6 (the regulating rod group insertion limits) to be suspended during PHYSICS TESTS. ITS LCO 3.1.8 only requires the regulating rod insertion limits associated with the restricted region to be suspended. This changes the CTS by imposing an additional requirement on the application of the test exception LCO.

The purpose of CTS 3.10.1 is to allow certain LCOs to not be met during the performance of PHYSICS TESTS. CTS 3.1.3.6 (ITS 3.2.1) specifies the physical insertion, sequence, and overlap limits for the regulating rod groups. This change will require the sequence and overlap limits to be met and will only allow the plant to enter the restricted operation region. The plant will not be able to enter the unacceptable region of the regulating group position operating limits curves. This change is acceptable because the PHYSICS TESTS do not require any test to violate the sequence and overlap limits and do not require entry into the unacceptable region of the regulating group position operating limits curves.

This change is designated as more restrictive because it imposes additional restrictions not found in the CTS.

RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES LA01 (Type 5 - Removal of Cycle-Specific ParameterLimits from the Technical Specifications to the Core OperatingLimits Report) CTS 3.1.1.1 and associated Action require that the SDM be > 1.0% Ak/k. ITS LCO 3.1.8.d states that the SDM shall be within the limits specified in the COLR, ITS 3.1.8 ACTION A provides actions for when the SDM is not within the limits, and ITS SR 3.1.8.4 requires verification that the SDM is within limits specified in the COLR. This changes the CTS by relocating the SDM limits, which must be confirmed on a cycle-specific basis, to the COLR.

The removal of these cycle-specific parameter limits from the Technical Specifications to the COLR is acceptable because the cycle-specific limits are developed or utilized under NRC-approved methodologies which will ensure that the Safety Limits are met. The NRC documented in Generic Letter 88-16, "Removal of Cycle-Specific Parameter Limits From Technical Specifications,"

that this type of information is not necessary to be included in the Technical Davis-Besse Page 3 of 5 Attachment 1, Volume 6, Rev. 1, Page 179 of 307

Attachment 1, Volume 6, Rev. 1, Page 180 of 307 DISCUSSION OF CHANGES ITS 3.1.8, PHYSICS TESTS EXCEPTIONS - MODE 1 Specifications to provide adequate protection of public health and safety. The ITS still retains the SDM requirement. The methodologies used to develop the parameters in the COLR have obtained prior approval by the NRC in accordance with Generic Letter 88-16. Also, this change is acceptable because the removed information will be adequately controlled in the COLR under the requirements provided in ITS 5.6.3, "CORE OPERATING LIMITS REPORT." ITS 5.6.3 ensures that the applicable limits (e.g., fuel thermal mechanical limits, core thermal hydraulic limits, Emergency Core Cooling Systems limits, and nuclear limits such as SDM, transient analysis limits, and accident analysis limits) of the safety analyses are met. This change is designated as a less restrictive removal of detail change because information relating to cycle-specific parameter limits is being removed from the Technical Specifications.

LESS RESTRICTIVE CHANGES L01 (Category2- Relaxation of Applicability) CTS 3.10.1 requires the limits of Specification 3.2.2 (F0 ) and Specification 3.2.3 (F N) to be maintained at all times during the PHYSICS TESTS in MODE 1. ITS 3.10.1.d only requires FQ and F, H to maintained at THERMAL POWER > 20% RTP. This changes the CTS by reducing the applicable conditions in which the Nuclear Heat Flux Hot Channel Factor (FQ) and Nuclear Enthalpy Rise Hot Channel Factor (F H) requirements must be met.

The purpose of CTS 3.10.1 is to establish limits that constrain the core power distribution within design limits during the PHYSICS TESTS such that accident initial condition protection criteria are preserved. This change is acceptable because the requirements continue to ensure that the core power distributions are maintained in the MODES and other specified conditions assumed in the safety analyses and licensing basis. This change revises the Applicability of FQ and F',Hof CTS 3.10.1 from "MODE 1" to "MODE 1 with THERMAL POWER

> 20% RTP." With THERMAL POWER less than or equal to 20% RTP, the reactor has insufficient stored energy in the fuel or energy being transferred to the coolant to require a limit on the distribution of core power. Along with this change the CTS 3.10.1 Action and Surveillance Requirement CTS 4.10.1.2 has been changed to only apply at THERMAL POWER > 20% RTP. This change is designated as less restrictive because the LCO requirements, Action, and Surveillance Requirement are applicable in fewer operating conditions than in the CTS.

L02 (Category 3 - Relaxation of Completion Time) When SDM is not within limit, the CTS 3.1.1.1 Action requires the plant to immediately initiate and continue boration at > 25 gpm, of 7875 ppm boron or its equivalent, until the required SDM is restored. ITS 3.1.8 Required Action A.1 requires the boration to proceed within 15 minutes to reduce SDM to within limit. This changes the CTS by relaxing the Completion Time from "immediately" to 15 minutes.

The purpose of the CTS 3.1.1.1 Action is to restore the SDM to within its limit promptly. This change is acceptable because the Completion Time is consistent with safe operation under the specified Condition, considering the operability Davis-Besse Page 4 of 5 Attachment 1, Volume 6, Rev. 1, Page 180 of 307

Attachment 1, Volume 6, Rev. 1, Page 181 of 307 DISCUSSION OF CHANGES ITS 3.1.8, PHYSICS TESTS EXCEPTIONS - MODE 1 status of the redundant systems of required features, the capacity and capability of remaining features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the allowed Completion Time. The ITS Completion Time of 15 minutes is adequate for an operator to correctly align and start the required systems and components. In addition, the ITS Bases for the ACTION states that boration must be initiated promptly. This change is designated as less restrictive because additional time is allowed to restore parameters to within the LCO limits than was allowed in the CTS.

L03 (Category4 - Relaxation of Required Action) CTS 3.1.1.1 Action states that when the SDM is not within the applicable limits, boration must be initiated and continued at > 25 gpm of 7875 ppm boron or equivalent until the required SDM is restored. ITS 3.1.8 ACTION A states that with the SDM not within limits, initiate boration to restore SDM to within limits. This changes the CTS by eliminating the specific values of flow rate and boron concentration that must be used to restore compliance with the LCO.

The purpose of the CTS 3.1.1.1 Action is to restore the SDM to within its limits.

This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the operability status of the redundant systems of required features, the capacity and capability of remaining features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the repair period. Removing the specific values of flow rate and boron concentration from the CTS Action provides flexibility in the restoration of the SDM and eliminates conflicts between the SDM value and the specific boration values in the CTS Action. As stated in the ITS 3.1.8 Bases for ACTION A, "In the determination of the required combination of boration flow rate and boron concentration, there is no unique requirement that must be satisfied. Since it is imperative to raise the boron concentration of the RCS as soon as possible, the boron concentration should be a highly concentrated solution, such as that normally found in the boric acid tank or the refueling water storage tank. The operator should borate with the best source available for the unit conditions." Specifying a minimum flow rate and concentration in the ACTION may not accomplish the objective of raising the RCS boron concentration as soon as possible. This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

Davis-Besse Page 5 of 5 Attachment 1, Volume 6, Rev. 1, Page 181 of 307

Attachment 1, Volume 6, Rev. 1, Page 182 of 307 Improved Standard Technical Specifications (ISTS) Markup 0 and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 182 of 307

Attachment 1, Volume 6, Rev. 1, Page 183 of 307 PHYSICS TESTS Exceptions - MODE 1 3.1.8'

CTS 3.1 REACTIVITYCbN'TROL SYSTEMS 31.18 PHYSICSTESTS Exceptions - MODE 1 3.10.1, LCO 3.1.8: During the performance of PHYSICS TESTS, the~requirements of:

3.1.1.1 LCO 3.1.4 "CONTROL ROEOAlignment Limit"G 0

LCO3.1i .5, LCO 3.1.6, "Safety Rod Insertion Limit "AXIAL POWER SHAPING RODtAlignment Limit

[D 0G LCO 3.2.1, "Regulating Rod Insertion Limits," for the restricted(

operation region only~

LcO3.2.2, "AXIAL LCO 3.2.3, "AXIAL POWER IMBALANCE Operating Limits '*anda POWER SHAPING ROD (APSR) Insertion Limits;"

LCcO 3.2.4, "QUADRANT POWER TILT" 0 may be suspended, provided:

a. THERMAL POWER is maintained _< 85% RTP Hiah Flux

b. uclear er ower trip setpoint is

10%. RTP higher than the THERMAL POWER at which the test is performed, with a maximum setting of 90% RTPI

--- NOTE ----------------------

0

c. Only. required when THERMAL POWER is > 20% RTP.

Fc&K and F' ýare maintained within the limits specified in the 0 COLR and 0 d.. SDM is within the limits specified in the COLR.

APPLICABILITY:. MODE 1 during PHYSICS TESTS.

BWQG STS 3.1.8-1 Rev. 3.0, 03131/04 Attachment 1, Volume 6, Rev. 1, Page 183 of 307

Attachment 1, Volume 6, Rev. 1, Page 184 of 307 PHYSICS TESTS Exceptions - MODE 1 3.1 .8 0

CTS ACTIONS CONDITION REQUIRED ACTION !COMPLETION TIME 3.1.1.1 Action A. SDM not within limit. AAI Initiate boration to re~store 15 minutes SDM to within, limit.

AND A.2 Suspend PHYSICS TESTS 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months exceptions.

3.10.1 Action B. THERMAL POWER B;1 Suspend PHYSICS TESTS 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months

> 85% RTP. exceptions.

OR Hig Flux ucear verpowe trip setpoint > 10% higher 0

than PHYSICS TESTS power'level.

tnl?

,,CihFlux uclearveyerpower trip 0 setpoint > 90%. RTP.

OR

NOTE ------------

Only required when TH ERMAL POWER is

> 20% RTP.

FQM or FNH notwithin 0 limits.

BWOG STS 3.1.8-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 184 of 307

Attachment 1, Volume 6, Rev. 1, Page 185 of 307 PHYSICS TESTS Exceptions - MODE1I 3.1.8 CTS 0 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY DOC M03 SR 3.1.8.1 Verify THERMAL POWER is:*85% RTP. 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 4.10.1.2 SR 3.1.8.2 -------------- -------- NOTE----------------

Only required to be met when THERMAL POWER is

> 20% RTP.

-'*+-- --------

Perform SR 3.2.5.1. 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

High Flux 4.10.1.1 SR 3.1.8.3 Verify erpowertrip setpointis *10% RTP higher than the THERMAL POWER at which the 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 0 testis performed,with a maximum setting of 90% RTP.

DOC M03 SR 3.1.8.4 Verify SDM is within the limits specified in the 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months COLR.

BWOG STS 3.1.8-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 185 of 307

Attachment 1, Volume 6, Rev. 1, Page 186 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.8, PHYSICS TESTS EXCEPTIONS - MODE I

1. These punctuation corrections have been made consistent with the Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 5.1.3.

2. Changes are made which reflect the plant specific nomenclature.

3. Changes are made to reflect another Specification.

4. The allowance to not meet the APSR insertion limits (ITS LCO 3.2.2) during a PHYSICS TEST has been added to be consistent with the allowances provided to not meet insertion limits for the safety rods (ITS LCO 3.1.5) and the regulating rods (ITS LCO 3.2.1). This is also consistent with the current licensing basis (CTS 3.10.1).

5. Correct LCO title has been provided.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 186 of 307

Attachment 1, Volume 6, Rev. 1, Page 187 of 307 Improved Standard Technical Specifications (ISTS) Bases Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 187 of 307

Attachment 1, Volume 6, Rev. 1, Page 188 of 307 PHYSICS TESTS Exceptions - MODE 1 B 3.1..8

. B3..1 REACTIVITY CONTROL SYSTEMS B, 3.1., PHYSICS TESTS Exceptions Systems - MODE 1 BASES BACKGROUND The purpose of this MODE 1 LCO is to permit PHYSICS TESTS to be conducted by providing exemptions from the requirements of other LCOs.

Establishment of a test program to verify that structures, systems, and components will perform satisfactorily in service is required by Section XI of 10 CFR 50, Appendix B (Ref. 1). Testing is requiredas an integral part of the design, fabrication, construction, and operation of the power plant.

All functions necessary to ensure that specified design conditions are not violated during normal operation and anticipated operational occurrences must be tested. Requirements for notification of the NRC, for the purpose ofconducting tests and experiments, are specified in 10 CFR. 50.59 (Ref. 2).

The key objectives of a test program are to (Ref. 3): (D

a. Ensure that the facility has been adequately designed**

b. Validate the analytical modelswused in the design and analysis

c. Verify the assumptions used to predict unit respons

d. Ensure that installation of equipment in the facility has been accomplished in accordance with the design and

e. Verify. that the operating and emergency procedures are. adequate.

To accomplish these objectives,: testing is performed prior to initial criticality; during startup, low power operations, and power ascension; at high powers; and after each fueling. The, PHYSICS TESTS requirements for reload fuel cycles ensure -that the operating characteristics of the core are consistent with the design predictions, and that the core can be operated as designed (Ref. 4).

PHYSICS TESTS procedures are written and approved in accordance with established guidelines. The procedures include all information necessary to permit a detailed execution of testing required to ensurethe design intent is met. PHYSICS TESTS are performed in accordancewith BVV*G STS B 3.1.8-1 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 188 of 307

Attachment 1, Volume 6, Rev. 1, Page 189 of 307 PHYSICS TESTS Exceptions MODE 1 B 3.1.8 BASES BACKGROUND %(continued)-

these procedures, and.'test results are approved prior tocontinued power escalation and long term power operation. Examples of PHYSICS TESTS include determination of.critical boron concentration, CONTROL

.ROD group worths, reactivity coefficients, :flux symmetry, and. core power distribution.

APPLICABLE It isacceptable to suspend certain LCOs for PHYSICS TESTS because.

SAFETY reactor protection criteria are preserved by the LCOs still in effect and by ANALYSES the SRs. Even if an accident occurs during PHYSICS TESTS with one or more LCOs suspended, fuel damage criteria are preserved because. the limits on nuclear hot channel factors, ejected rod worth, and shutdown capaollny are maintalned auring the Y*2 Ia I . 141 nd1*

14.1-2 and 14-1-3 Reference 5 defines. requirements for initial testing of the facility, including PHYSICS TESTS. Table.s 13-3 ard 13-4 Ref..6) summarize theeF1 post-initial fuel loading- low po der, and power test . Requirements for reload fuel cycle ._IUFSAR, Appendix 4B precritical testing and post- PHYSICS TESTS are given in ITable 1 ANST/ANS-19.6.1-1985 Ref. 4) rtattt e Although these PHYSICS TESTS are generally accomplished within the limits of all LCOs, one or more LCOs must sometimes be suspended to Asummary othe PHYSICS make completion of PHYSICS TESTS possible or practical.

lTESTS for each cycle are listed in Reference 7.

This is acceptable as longas the fuel design criteria are not violated.

When.one ormore of the limits specified in:

LCO 3.1.4, "CONTROL ROD Group Alignment, Limit LCO 3.1.5, "Safety Rod Insertion Limits" LCO 3.1.6, "AXIAL POWER SHAPING ROD(APSR) Alignment Limit LCO 3.2.1, Regulating Rod. Insertion Limits," for ,ithe restricted operation .

region:.onl I 9LCO 3.2.2, "AXIAL POWER LCO 3.2.3, SHAPING ROD (APSR)

"AXIAL POWER IMBALANCE Operating. Limits" or Insertion Limits;" LCO 32.4, "QUADRANT POWER TILT (QPT)"

are suspended for PHYSICS TESTS, the fuel design criteria are preserved by maintaining the nuclear hot channel factors (in MODE 1 PHYSICS TESTS) within their limits, maintaining ejected rod worth within limits by restricting regulating rod insertion to within the acceptable operating region or the restricted. operating region, by limiting maximum THERMAL POWER and by maintaining SDM within the limits specified in the COLR. Therefore, surveillance.of the FcQ the FAH, and SDM is 0

BWOG STS B 3.1.8-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 189 of 307

Attachment 1, Volume 6, Rev. 1, Page 190 of 307 PHYSICS TESTS Exceptions- MODE 1 B :3.i1:.8 S BASES APPLICABLE SAFETY ANALYSES (continued),

required to verify that.their limits are .not exceeded. The iimits for the nuclear hot 'channel factors are specified in the .COLR. Refer to the Bases for LCO 3.2.5 for a complete discUssion of FcM and F H During PHYSICS TESTS, one or more of the LCOs that.normally preserve the FcM and F,. limits may be suspended. However,. the results.of the safety analysis are notadversely impacted, if verification that .FQ0 and 0 F,, are within their limits is obtained, while one or more of the LCOs is suspended. Therefore, SRs are placed on FcA and FA.H during MODE 1 0

PHYSICS TESTS when THERMAL POWER exceeds 20% RTP to verify that these factors remain within their limits. Periodic verification of these factors allows PHYSICS TESTS to be conducted while continuing.to:

maintain the design criteria.

PHYSICS TESTS include measurement of core nuclear parameters or exercise of control components that affect process variables. Among the process variables involved are AXIAL POWER IMBALANCE and OPT, which represent initial condition input (power peaking) for the accident analysis. Also involved are the movable control components, i.e.,, the The regulating rods and the APSRs, which affect power peaking a rregullang variables are aisood required for shutdown of the reactor. The limits for these specified for each fuel cycle in the COLR.

As described in LCO 3.0.7, compliance with Test Exceptions LCOs. is optional, and therefore no criteria. of 10 CFR 50.36()(2)(ii) apply. Test Exceptions LCOs provide flexibility to perform certain operations by appropriately modifying requirements of other LCOs. A dis'cussion of the criteria satisfied for the other LCOs is provided in their respective Bases.

LCO This LCO permits individual 0IRO " to be positioned outside of 0 their specified group alignmqnt and withdrawal limits and,to0be assigned to .other than specified IC,O IN-ROL R groups, and permits AXIAL POWER IMBALANCE and QPT limits to be exceeded during the performance of PHYSICS TESTS. In addition, this LCO permits verification of the fundamental core characteristics:and nuclear instrumentation operation.

The requirements'of LCO.3.1.4, LCO 3:1.5, LCO 3.1.6, LCO 3.2.1 (for~the LCO 32.2, restricted operation region only)-,LOO 3.2.3, and LCO 3.2A4 may be suspended during the performance of PHYSICS TESTS provided:

BWOG STS B 3.1.8-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 190 of 307

Attachment 1, Volume 6, Rev. 1, Page 191 of 307 PHYSICS TESTS Exceptions:- MODE'1 B 3.1.8' 0 BASES8 LCO. (continued)

a. THERMAL POWER is maintained< 85% R.TP]p 0

b.

HihFlux Nerowerltrip~setpoint is < 10% RTP higher than the 0 THERMAL POWER at which the test: is performed, with a maximum setting of 90% RTPM , __0 0

c. Fc and F',H are maintained within limits specified in the COLR: 0 while operating at greater than 20% RTP and 0

d. SDM is maintained within the limits specified in the COLR.

Operationwith THERMALPOWER !5 85% RTP during PHYSICS TESTS provides an acceptable thermal margin when one or more of the applicable LCOs is out of specification. Eighty-five percent RTP is consistent with the maximum power level for conducting the intermediate High Flux core power distribution test specified in Reference 4. Then o o trip setpoint is reduced so that a similar margin exists between

,the steady state condition and tripsetpoint as exists during normal 0

operation at RTP.

LCO provision c is modified, by a Note that requires the adherence to power peaking factor requirements only when THERMAL POWER is.

greater than 20% RTP. This establishes an LCO provision thatis consistent with the Applicability of LCO 3.2.5, "Power Peaking Factors."

APPLICABILITY This LCO is applicable in MODE.1 ,when the reactor has completed low power testing and is in power ascension, or during power operation with THERMAL POWER > 5% RTP but<5 85% RTP. This LCO is applicable for power ascension testing, as defined by Regulatory Guide 1.68

ý(Ref. 3). In MODE 2, Applicability of this LCO is not required because LCO.3.1.9, "PHYSICS TESTS Exceptions - MODE2," addresses PHYSICS TESTS exceptions in MODE 2. In MODES 3, 4, 5, and 6, Applicability is not required because PHYSICS TESTS are not performed in these MODES.

BWOG STS B 3.1.8-4 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 191 of 307

Attachment 1, Volume 6, Rev. 1, Page 192 of 307 PHYSICS TESTS Exceptions - MODE 1 B 3.1.8 BASES ACTIONS A1 :and A.2*

Since itis imperative to raise the Ifthe SDM requirements are not met, boration must be initiated promptly.

boron concentration of the ROS A Completion Time of 15 minutes is adequate for an operator to correctly as soon as possible, the boron concentration should be a highly .align and start the irequired systems and components. The operator concentrated solution, such as should begin boration with the best:source availablefor the plant that normally found in the boric acid addition tanks or the borated conditions./Boration will be continued.until SDM is within limit. In the water storage tank. determination of the.required combination of boration flow rate and boron concentrationjthere is no uni que requirement that must be satisfied.

Suspension of PHYSICS TESTS exceptions requires restoration of each of .the applicable LCOs to within specification.

B1i If THERMAL POWER exceeds 85% RTP, then 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months is allowed for the operator to reduce THERMAL POWER to within limits or to complete an

-orderly suspensi.on of PHYSICS TESTS exceptions. Suspension of PHYSICS.TESTS.exceptions requires restoration of each. of the

applicable individual LCOs to within: specification. This required Completion Time isconsistent with, or more conservative than, those specified for the individual LCO, addressed by PHYSICS TESTS exceptions.

High Flux If th]nuclearerpower trip setpoint is not within the specified limits, then High Fl hour is allowed for the operator to restore thenuclearoerpowertrip e

High Flux t---'~r . * .. . * ..

setpoint within limits or to complete an orderly suspension of PHYSICS TESTS exceptions. Suspension of PHYSICS TESTS exceptions requires restoration .of each of the applicable individual LCOs to within

,specification. This required Completion Time is consistent with, or more conservative than; those specified for the individual LCO, addressed by these PHYSICSTESTS exceptions.

If the results0of the incore flux map indicate that either FQM or F"H has exceeded its limit when THERMAL POWER is greater than 20% RTP, then PHYSICS TESTS are suspended. This action is required because of direct indication that the core peaking factors, which are fundamental initial con.ditions for the safety analysis, are excessive. Suspension of PHYSICS TESTS exceptions requires restoration of each of the applicable LCOs to within specification.

This Condition is modified by a Note that requires performance of the Required Action only when THERMAL POWER is greater than 20% RTP.

This establishes an ACTIONS entry Condition that is consistent with LCO

.provision c and the Applicability of LCO 3.2.5, "Power Peaking Factors.,"

BWOG STS B 3.1.8-5 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 192 of 307

Attachment 1, Volume 6, Rev. 1, Page 193 of 307 PHYSICS&TESTS Exceptions - MODE 1 B 3.1.:8 BASES SURVEILLANCE .SR 3.1.8.1 REQUIREMENTS Verification that THERMAL POWER, is :_-85% RTP ensures that the requir*ed..additional thermal margin has:been established prior to and during PHYSICS TESTS:. The required Frequency of once per hour allows.the operator. adequate time to determine any degradation of the

established thermal. margin during PHYSICS TESTS.

SR 3.1.8.2.

Verificationthat FQ. and .FH are within their limits ensures that core local linear heat rate and departure from nucleate boiling ratio will remain within their limits, whilebone or'more of the LCOs. that normally control

!these.design limits are out of specification. The required Frequency of 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months allows the operator adequate time for collecting~a flux map and for performing the hot channel factor verifications, based on operating experience. If SR 3.2.5.1 is not met, PHYSICS TESTS.are suspended and LCo 3.2.5 applies. This Frequency is more conservative than the Completion Time for restoration of the individual LCOs that preserve the F a n d F'A . limits.

This SR is modified by a Note that requires performance only when THERMAL POWER is greater than 20%. RTP. This establishes a performance requirement.Ithat isconsistent with the Applicability of LCO3.2.5, "Power Peaking Factors."

SR 3.1.8.3 F-High

ýFWu Verification that the nuc ear er ower trp setpoint is within the limit specified for each PHYSICS TEST .nsure that core protection at the Q

reduced power level is established and.will remain in place duringthe PHYSICS TESTS. Performing the verification onceevery 8. hours allows the operator adequate time for determining any degradation of the established tripsetpoint margin before and during PHYSICS TESTS and for adjusting the nuc ear er owertripsetpoint(

High =Flux BV\A0G ST& B 3.1.8-6 Rev. 3.0,:03/31/04 Attachment 1, Volume 6, Rev. 1, Page 193 of 307

Attachment 1, Volume 6, Rev. 1, Page 194 of 307 PHYSICSTESTS Exceptions - MODE 1 BASES SURVEILLANCE REQUIREMENTS (continued)

SR 3.1 :.,8'.4 The SDM is verified by performing a reactivity balance calculation, but not considering the.following reactivityeffects:

limited to,

a. Reactor Coolant System (RCS) boron concentration@,,,

b. C N L FROe position

c. Doppler defect((F

d. Fuel.burnup based on gross thermal energy generation e.. Samarium concentration

f. Xenon concentratio and

g. Moderator defect.

The Frequencyof24 hours is'.based on the generally slow change in required boron -concentration and on the low probability of an accident occurring without the required SDM.

REFERENCES 1. 10 CFR 50, Appendix B, Section XI..

2. 10 CFR 50.59.

3. Regulatory Guide 1.68, Revision 2, August 1.978.

4. JANSUlNS-19.6.1- 985, Decembr 13, 1985.- U A

5. Sec ionSection UAFSAR, 1.1-B6. FSAR, ctio 3., Tables 13 and*3-4,A 4 BV\A)G STS: B 3.1.8-7 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 194 of 307

Attachment 1, Volume 6, Rev. 1, Page 195 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.8 BASES, PHYSICS TESTS EXCEPTIONS - MODE 1

1. These punctuation corrections have been made consistent with the Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 5.1.3.

2. Changes are made (additions, deletions, and/or changes) to the ISTS Bases which reflect the plant specific nomenclature, number, reference, system description, analysis, or licensing basis description.

3. The brackets have been removed and the proper plant specific information/value has been provided.

4. Typographical error corrected.

5. Changes are made to reflect changes made to the Specification.

6. Changes are made to be consistent with other places in the Bases (i.e., LCO 3.1.1 Required Action A.1).

Davis-Besse Page 1 of I Attachment 1, Volume 6, Rev. 1, Page 195 of 307

Attachment 1, Volume 6, Rev. 1, Page 196 of 307 0 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 196 of 307

Attachment 1, Volume 6, Rev. 1, Page 197 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS ITS 3.1.8, PHYSICS TESTS EXCEPTIONS - MODE 1 There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 197 of 307

Attachment 1, Volume 6, Rev. 1, Page 198 of 307 ATTACHMENT 9 ITS 3.1.9, PHYSICS TESTS EXCEPTIONS - MODE 2 Attachment 1, Volume 6, Rev. 1, Page 198 of 307

, Volume 6, Rev. 1, Page 199 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs) , Volume 6, Rev. 1, Page 199 of 307

Attachment 1, Volume 6, Rev. 1, Page 200 of 307 ITS 3.1.9 ITS 0 SPECLAL TEST EXCEPTIONS PHYSICS TESTS M WM G CN_ -- N __ _

LCO 3.1.9 3.10,2 The lirhitations. fSpecifications 3,1.1.3, 3.1.31, 3.1.3.2, 3.1.35.35, 3, ... and 3.1.13 may-be suspended during the performance of PHYSICS TESTS provided;:____

LG 3.4.2 L03

a. The THERMAL POWER does not exceed 5% of RATED THERMAL POWER, and b, The reactor trip setpoints on the OPERABLE High Flux Channels are set at < 25% of RATED THERMAL POWER.

c. The nuclear instrumentation Source R* ',e and Internne ate Ran highstartup rate control rod withdrawal inhibit are OPERA.BLE. L0,3*

APLCBL4 I OE2 Add proposed LCO 3.1.9 part e )-

APPLICABILITY:ý MODE 2.

ACTION.

ACTION A With theTHERMAL POWER > 5% of RATED THERMAL POWER, immediately. open the control rod drive trip breakers. Add proposed ACTION C Add proposed ACTION D M0" SR 3.1.9.3 4.10,2.1 The THERMAL POWER shall be determined to be < 5% of RATED THERMAL POWER at least once per hour during PHYSICS TESTS. LA01 SR 3.1.9.1 4110;2.2 Each

urce d Intermedi e Ran, and High Flux Channel shall be subjected to a CHANNEL FUNCTIONAL TEST within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months prior to initiating PHYSICS TESTS.

DAVIS-BESSE, UNIT I 3/4 10-2 Amendment No. 33, 2 17 Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 200 of 307

Attachment 1, Volume 6, Rev. 1, Page 201 of 307 ITS 3.1.9 ITS

.314..l REACTIVITY CONTROL SYSTEMS 3/41.:1 BORATION CONTROL SHUTDOWN MARGIN LIMITING CONDITION FOR OPERATION LCO 3.1 .9.d 3.1 .I The SHUTDOWN MA RGIN shall be> /within limits specified in the COLR See L MITS 3.1.2, APPLICABILITY: MODES I , 3P, ,4 and5 ITS 3.1.8, ACTION:

ACTION B With the SHUTDOWN MARGIN < 1/ imoediately initiate an contue oration lat >25 gpm 9f7875 ppm boron'or!.iequivalent, until the required SHUTDOWN' MARGIN ,is restored.

SURVEILLANCE REQUIREMENTS See ITS 3.1.1 4.11.1.1 The SHUTDOWN MARGIN shall bedetermined to be > 1% Ak"k:l and ITS 3.2.1)

See

a. Within one hour after detection of an inoperable control rod(s) and at least once ITS 3.1.44 per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod(s) is mnoperable. If the inoperable control rod is immovable or untrippable.the above required SHUTDOWN MARGIN shall be See.

increased by an amount at.least equal to the withdrawn worth of the immovable or ITS 1.0 buntrippable control rod(2l a rod groups withdrawal is.within the limits of Specification 3.1.3,6. See ITS 3.2.1

c. When in MODE 2" within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months prior.to achieving reactor criticality by verifying that the predicted critical control rod position is within the limits of Specification 31.3.6.

d. Prior to initial operation above 5% RATED THERMAL POWER after each fuel lo ading by consideration -ofthe: factors o fe. below, with the regulating rod groups See ITS]

at the maximum Iinsertion iimiIt of Speci ficati on 3.1.3.6. 3..

See ITS 3.1.1 and ITS 3.2.1 9

- See

-See LCO.3.7.9, Steam Generator Level, for additional SHUTDOWN MARGIN requirements.

With k ff > I -,OIT I 3.1.11 J ITS 3.

"Wt:keff-< 1.0

Se" S 3.2.1]

DAVIS-BESSE, UNIT 1 3/4 1-1 Amendment No. 494;4-92-, 276 0 Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 201 of 307

Attachment 1, Volume 6, Rev. 1, Page 202 of 307 DISCUSSION OF CHANGES ITS 3.1.9, PHYSICS TESTS EXCEPTIONS - MODE 2 ADMINISTRATIVE CHANGES A01 In the conversion of the Davis-Besse Current Technical Specifications (CTS) to the plant specific Improved Technical Specifications (ITS), certain changes (wording preferences, editorial changes, reformatting, revised numbering, etc.) are made to obtain consistency with NUREG-"1430, Rev. 3.1, "Standard Technical Specifications-Babcock and Wilcox Plants" (ISTS).

These changes are designated as administrative changes and are acceptable because they do not result in technical changes to the CTS.

A02 CTS 3.10.2 allows the limitation of Specification 3.1.3.7 to be suspended during the performance of the PHYSICS TEST. ITS 3.1.9 does not include this specific allowance to suspend Specification 3.1.3.7 during the performance of the PHYSICS test.

This change is acceptable because the requirements have not changed.

CTS 3.1.3.7, Rod Program, requirements have been relocated to the TRM. The TRM will continue to allow the Rod Program requirements of CTS 3.1.3.7 to be suspended during the PHYSICS test. This change is considered administrative because the technical requirements have not changed.

MORE RESTRICTIVE CHANGES M01 CTS 3.10.2 does not provide any Actions for when the requirements of LCO 3.10.2.b (the High Flux channel trip setpoint limitation) or LCO 3.10.2.c (the nuclear instrumentation high startup rate control rod withdrawal inhibit OPERABILITY requirement) are not met. ITS 3.1.9 ACTION D includes a Condition to cover the high flux trip setpoint not within limit and nuclear instrumentation high startup rate control rod withdrawal inhibit inoperable.

ITS 3.1.9 Required Action D.1 requires the suspension of PHYSICS TESTS exception within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . This changes the CTS by imposing an additional requirement on the application of the test exception LCO.

The purpose of the ITS 3.1.9 Conditions and Required Action D.1 is to place the plant in a safe condition when the limits are not met. Currently, the CTS 3.10.2 Action does not provide any compensatory actions if the requirements of LCO 3.10.2.b (the High Flux channel trip setpoint limitation) or LCO 3.10.2.c (the nuclear instrumentation high startup rate control rod withdrawal inhibit OPERABILITY requirement) are not met. Therefore, testing would be suspended and the LCOs that have been suspended would have to be restored towithin limit. The proposed Required Action requires the unit to suspend the PHYSICS TESTS exceptions within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . Suspension of PHYSICS TESTS exceptions requires restoration of each of the applicable LCOs to within specification. The Completion Time to accomplish this is "1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ," therefore the change is more restrictive. The change is acceptable and necessary because the initial conditions for the safety analysis are not being met. This change is designated as more restrictive because it imposes additional restrictions not found in the CTS.

Davis-Besse Page 1 of 5 Attachment 1, Volume 6, Rev. 1, Page 202 of 307

Attachment 1, Volume 6, Rev. 1, Page 203 of 307 DISCUSSION OF CHANGES ITS 3.1.9, PHYSICS TESTS EXCEPTIONS - MODE 2 M02 CTS 3.1.1.1 requires SHTUDOWN MARGIN to be within limit, however the Surveillance Requirements in MODE 2 are to verify the regulating rod groups are within the insertion limits every 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and to verify within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months prior to achieving reactor criticality predicted control rod position is within limit of CTS 3.1.3.6. ITS SR 3.1.9.4 requires SDM to be with limits every 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . This changes the CTS by addihg an additional Surveillance Requirement.

This change is acceptable because the Surveillance Requirement is necessary to ensure the requirements of the LCO are being met. The SDM verification in ITS SR 3.1.9.4 requires a reactivity balance calculation to be performed. This ensures SDM is met because the regulating rod groups are not required to be within insertion limits. This change is designated as more restrictive because a new Surveillance Requirement is being added to the Technical Specifications..

M03 CTS 3.1.1.1 Action does not provide any specific requirements to suspend PHYSICS TESTS when SDM is not met. ITS 3.1.9 Required Action B.2 requires suspension of the PHYSICS TEST exception within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . This changes the CTS by imposing an additional requirement on the application of the test exception LCO.

This change is acceptable because it imposes reasonable restrictions on the performance of PHYSICS TESTS when SDM is not met. The Bases for ITS 3.1.1, "SHUTDOWN MARGIN (SDM)," states that in MODE 2, the SDM is ensured by compliance with the rod insertion limit Specifications (LCO 3.1.5 and LCO 3.2.1). Under the test exception, those control rod insertion limits are allowed to be violated. Therefore, additional actions must be taken to ensure that sufficient SHUTDOWN MARGIN is available to shutdown the reactor and keep it subcritical if needed when in MODE 2. This change is designated as more restrictive because it imposes additional restrictions not found in the CTS.

M04 CTS 3.10.2 allows the requirements of CTS 3.1.3.6 (Regulating Rod Insertion Limits) to be suspended during performance of PHYSICS TESTS when in MODE 2. This includes the sequence and overlap limits as well as the insertion limits for both the restricted operation region and the unacceptable operation region. ITS 3.1.9 does not allow suspension of the LCO 3.2.1 insertion limits for the unacceptable operation region; only the insertion limits for the restricted operation region and the sequence and overlap limits are allowed to be suspended. This changes the CTS by deleting the allowance to suspend the regulating rod insertion limits for the unacceptable operation region during PHYSICS TESTS in MODE 2.

This change is acceptable because it imposes reasonable restrictions on the performance of PHYSICS TESTS. The unacceptable operation region should not be entered during a PHYSICS TEST, and is currently not entered. This will help ensure that SDM continues to be met during the MODE 2 PHYSICS TEST.

This change is designated as more restrictive because it imposes additional restrictions not found in the CTS.

Davis-Besse Page 2 of 5 Attachment 1, Volume 6, Rev. 1, Page 203 of 307

Attachment 1, Volume 6, Rev. 1, Page 204 of 307 DISCUSSION OF CHANGES ITS 3.1.9, PHYSICS TESTS EXCEPTIONS - MODE 2 RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES LA01 (Type 3 - Removing ProceduralDetails for Meeting TS Requirements or Reporting Requirements) CTS 3.10.2.c requires the nuclear instrumentation "Source Range and Intermediate Range" high startup rate control rod withdrawal inhibit to be OPERABLE. CTS 4.10.2.2, in part, requires the nuclear instrumentation "Source Range and Intermediate Range" high startup rate control rod withdrawal inhibit to be subjected to a CHANNEL FUNCTIONAL TEST. ITS LCO 3.1.9.c requires the nuclear instrumentation high startup rate control rod withdrawal inhibit to be OPERABLE. ITS SR 3.1.9.1, in part, requires the performance of a CHANNEL FUNCTIONAL TEST on the nuclear instrumentation rod inhibit channels. This changes the CTS by removing details of the specific channels (i.e., Source Range and Intermediate Range) and placing the information in the Bases.

The removal of these details for performing Surveillance Requirements from the Technical Specifications is acceptable because this type of information is not necessary to be included in the Technical Specifications to provide adequate protection of public health and safety. The ITS still retains the requirement that the nuclear instrumentation high startup rate control rod withdrawal inhibit be OPERABLE and also requires the performance of a CHANNEL FUNCTIONAL TEST. The details of the specific types of channels do not need to appear in the Specification in order for the requirement to apply. Also, this change is acceptable because these types of procedural details will be adequately controlled in the ITS Bases. Changes to the Bases are controlled by the Technical Specification Bases Control Program in Chapter 5. This program provides for the evaluation of changes to ensure the Bases are properly controlled. This change is designated as a less restrictive removal of detail change because procedural details for meeting Technical Specification requirements are being removed from the CTS.

LA02 (Type 5 - Removal of Cycle-Specific ParameterLimits from the Technical Specifications to the Core OperatingLimits Report) CTS 3.1.1.1 and associated Action require that the SDM be > 1.0% Ak/k. ITS LCO 3.1.9.d states that the SDM shall be within the limits specified in the COLR, ITS 3.1.9 ACTION B provides actions for when the SDM is not within the limits, and ITS SR 3.1.9.4 requires verification that the SDM is within limits specified in the COLR. This changes the CTS by relocating the SDM limits, which must be confirmed on a cycle-specific basis, to the COLR.

The removal of these cycle-specific parameter limits from the Technical Specifications to the COLR is acceptable because the cycle-specific limits are developed or utilized under NRC-approved methodologies which will ensure that the Safety Limits are met. The NRC documented in Generic Letter 88-16, "Removal of Cycle-Specific Parameter Limits From Technical Specifications,"

that this type of information is not necessary to be included in the Technical Davis-Besse Page 3 of 5 Attachment 1, Volume 6, Rev. 1, Page 204 of 307

Attachment 1, Volume 6, Rev. 1, Page 205 of 307 DISCUSSION OF CHANGES ITS 3.1.9, PHYSICS TESTS EXCEPTIONS - MODE 2 Specifications to provide adequate protection of public health and safety. The ITS still retains the SDM requirement. The methodologies used to develop the parameters in the COLR have obtained prior approval by the NRC in accordance with Generic Letter 88-16. Also, this change is acceptable because the removed information will be adequately controlled in the COLR under the requirements provided in ITS 5.6.3, "CORE OPERATING LIMITS REPORT." ITS 5.6.3 ensures that the applicable limits (e.g., fuel thermal mechanical limits, core thermal hydraulic limits, Emergency Core Cooling Systems limits, and nuclear limits such as SDM, transient analysis limits, and accident analysis limits) of the safety analyses are met. This change is designated as a less restrictive removal of detail change because information relating to cycle-specific parameter limits is being removed from the Technical Specifications.

LESS RESTRICTIVE CHANGES L01 (Category 3 - Relaxation of Completion Time) When SDM is not within limit, CTS 3.1.1.1 Action requires the plant to immediately initiate and continue boration at > 25 gpm, of 7875 ppm boron or its equivalent, until the required SDM is restored. ITS 3.1.9 Required Action B.1 requires the boration to proceed within 15 minutes to reduce SDM to within limit. This changes the CTS by relaxing the Completion Time from "immediately" to 15 minutes.

The purpose of CTS 3.1.1.1 Action is to restore the SDM to within its limit promptly. This change is acceptable because the Completion Time is consistent with safe operation under the specified Condition, considering the operability status of the redundant systems of required features, the capacity and capability of remaining features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the allowed Completion Time. The ITS Completion Time of 15 minutes is adequate for an operator to correctly align and start the required systems and components. In addition, the ITS Bases for the ACTION states that boration must be initiated promptly. This change is designated as less restrictive because additional time is allowed to restore parameters to within the LCO limits than was allowed in the CTS.

L02 (Category 4- Relaxation of Required Action) CTS 3.1.1.1 Action states that when the SDM is not within the applicable limits, boration must be initiated and continued at > 25 gpm of 7875 ppm boron or equivalent until the required SDM is restored. ITS 3.1.9 ACTION B states that with the SDM not within limits, initiate boration to restore SDM to within limits. This changes the CTS by eliminating the specific values of flow rate and boron concentration that must be used to restore compliance with the LCO.

The purpose of the CTS 3.1.1.1 Action is to restore the SDM to within its limits.

This change is acceptable because the Required Actions are used to establish remedial measures that must be taken in response to the degraded conditions in order to minimize risk associated with continued operation while providing time to repair inoperable features. The Required Actions are consistent with safe operation under the specified Condition, considering the operability status of the redundant systems of required features, the capacity and capability of remaining Davis-Besse Page 4 of 5 Attachment 1, Volume 6, Rev. 1, Page 205 of 307

Attachment 1, Volume 6, Rev. 1, Page 206 of 307 DISCUSSION OF CHANGES ITS 3.1.9, PHYSICS TESTS EXCEPTIONS - MODE 2 features, a reasonable time for repairs or replacement of required features, and the low probability of a DBA occurring during the repair period. Removing the specific values of flow rate and boron concentration from the CTS Action provides flexibility in the restoration of the SDM and eliminates conflicts between the SDM value and the specific boration values in the CTS Action. As stated in the ITS Bases for ACTION B, "In the determination of the required combination of boration flow rate and boron concentration, there is no unique requirement that must be satisfied. Since it is imperative to raise the boron concentration of the RCS as soon as possible, the boron concentration should be a highly concentrated solution, such as that normally found in the boric acid addition tanks or the borated water storage tank. The operator should borate with the best source available for the unit conditions." Boration at the minimum flow rate and concentration in the ACTION may not accomplish the objective of raising the RCS boron concentration as soon as possible. This change is designated as less restrictive because less stringent Required Actions are being applied in the ITS than were applied in the CTS.

L03 (Category I - Relaxation of LCO Requirements) CTS 3.10.2 state that limitations of certain Specifications may be suspended during the performance of PHYSICS TESTS. ITS 3.1.9 provides an additional exception to LCO 3.4.2, "RCS Minimum Temperature for Criticality," provided the RCS lowest loop average temperature is 2-520°F (ITS LCO 3.1.9 part e). A Surveillance to verify the RCS lowest loop average temperature is _ 520°F every 30 minutes (ITS SR 3.1.9.2) has been added. In addition, ITS 3.1.9 ACTION C has been added to cover the situation when RCS lowest loop average temperature is not within limit. The Required Action is to suspend PHYSICS TESTS exceptions within 30 minutes. This changes the CTS by allowing the suspension of the RCS minimum temperature for criticality limit during performance of a MODE 2 PHYSICS TEST. However, it places a limitation on the RCS lowest loop average temperature that is allowed during the test.

The purpose of CTS 3.10.2 is to allow some flexibility during the performance of PHYSICS TESTS, while ensuring appropriate limitations are in place to help maintain safe operation. This change is acceptable due to the low probability of an accident occurring and on operating experience. This changes the CTS by allowing the suspension of LCO 3.4.2, "RCS Minimum Temperature for Criticality." However, it places a limitation on the RCS lowest loop average temperature that is allowed. CTS 3.1.1.4 (ITS 3.4.2) requires the RCS lowest loop average temperature to be ->525 0 F. Therefore, this change reduces the temperature for criticality by 5 0 F during the performance of PHYSICS TESTS.

This is necessary to help facilitate the performance of certain tests, such as the determination of the control rod group worth. The lower limit on RCS average temperature is provided in the test exception LCO to ensure that the RCS temperature stays close to the normally allowed limit. Furthermore, the RCS average temperature is required to be verified every 30 minutes to ensure it is maintained within the allowed limit. This change is designated as less restrictive because less stringent LCO requirements are being applied in the ITS than were applied in the CTS.

Davis-Besse Page 5 of 5 Attachment 1, Volume 6, Rev. 1, Page 206 of 307

Attachment 1, Volume 6, Rev. 1, Page 207 of 307 Improved Standard Technical Specifications (ISTS) Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 207 of 307

Attachment 1, Volume 6, Rev. 1, Page 208 of 307 PHYSICS TESTS Exceptions.- MODE'12!

3.1.'9:

CTS

- .1 REACGTIVITY CONTROL SYSTEMS 0

3.1.9 ,PHYSICS TESTS Exceptions - MODE 2 3.10.2, LCO 3.1.9 During performance of PHYSICS TESTS, the requirements' of:

3.1.1.1 LCO 3.1.3, "ModeratorTemperature Coefficii __nlr.

LCO 3.1.4, "CONTROL ROD Group: Alignment LimitKS&"

for the sequence and LCO 3.1.5, "Safety Rod Insertion Limits," (ALSR -

overlap limits, and the insertion limits LCO 3.1 .6, "AXIAL POWER SHAPING RODAlignment I LCO 3.2.1, "Regulating Rod Insertion Limits,'"for the rest LCO 3.2.2, "AXIAL POWER SHAPING ROD [LCO 3.4.2 I operation region only[1*

"RCS Minimum Temperature for Criticality"[

,, Q (APSR) Insertion Limits;"

a nd may be sus pended provided that:

a. THERMAL POWER is <- 5% RTP High Flux 0

b. Reactor trip setpoints on the OPERABLE jnucleareverpowe* j channels are set to < 25% RTPM.*

c. Nuclear instrumentation high startup rate ýOl RO I D 0 0D withdrawal inhibit is OPERABL aEnd *

d. SDM is within the limits specified in the COL

e. RCS lowest loop average temperature is 2:R 520Q TF. TSTF APPLICABILITY: During PHYSICS TESTS initiated in MODE 2.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME 3.10.2 A. THERMAL POWER not A.1 Open control rod drive trip Immediately Action within limit, breakers.

B. SDM not within limit. B.1 Initiate boration to restore 15 minutes 3.1.1.1 Action SDM to within limit.

AND B.2 Suspend PHYSICS TESTS 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months exceptions.

BWOG STS 3.1.9-1 Rev. 3.0, 03/31104 Attachment 1, Volume 6, Rev. 1, Page 208 of 307

Attachment 1, Volume 6, Rev. 1, Page 209 of 307 PHYSICS TESTS Exceptions - MODE:2 3.1.9 CTS ACTIONS (b'ontinued)

INSERT 1 CON DIT ON REQUIREDACTION COMPLETION TIME TST

-46 DOC M01 [. Nuclear verpowetrip 1 Suspend PHYSICS TESTS 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months setpoint is not within: exceptions:.

L rlimit.

OR 00 Nuclear instrumentation high ,startup r*te:

witharawal inhibit inoperable.

SURVEILLANCE REQUIREMENTS

[INSERT 2 'SURVEILLANCE FREQUENCY 0

10.2.1- SRj.tq-FE Verify THERMAL POWER is *5% RTP. 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 0 TST SR 3.1.9.g-Ffl Ve. nfy-uclear overpower trip setpoint isý15% RTP. 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months

-47Ke.

DOC M02 SR 31.9*I- Verify SDM is within the limits specified in the 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months COLR.

4 ____________________________________

INSERT 3 TST BVWOG STS 3.1.9-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 209 of 307

Attachment 1, Volume 6, Rev. 1, Page 210 of 307 CTS 3.1.9 TSTF

-467 INSERT 1 DOC L03 RCS lowest loop Suspend PHYSICS 30 minutes average temperature 11 TESTS exceptions.

not within limit.

0 INSERT 2 4.10.2.2 SIR 3.1.9.1 Perform a CHANNEL FUNCTIONAL TEST on Once within each nuclear instrumentation high startup rate 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months prior control rod withdrawal inhibit and High Flux to initiating channel. PHYSICS TESTS TSTF INSERT 3 DOC L03 SIR 3.1.9.2 Verify the RCS lowest loop average 30 minutes temperature is Ž:M520rJF. 0 Insert Page 3.1.9-2 Attachment 1, Volume 6, Rev. 1, Page 210 of 307

Attachment 1, Volume 6, Rev. 1, Page 211 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.9, PHYSICS TESTS EXCEPTIONS - MODE 2

1. These punctuation corrections have been made consistent with the Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 5.1.3.

2. The brackets have been removed and the proper plant specific information/value has been provided.

3. Typographical error corrected.

4. ITS SR 3.1.9.1, a CHANNEL FUNCTIONAL TEST, has been added consistent with current licensing basis (CTS 4.10.2.2). This CHANNEL FUNCTIONAL TEST, in part, will verify the trip setpoint of the High Flux channels are < 25% RTP. Therefore, ISTS SR 3.1.9.2, the requirement to check the nuclear overpower trip setpoint every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months has been deleted. The 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months Frequency is not considered to be necessary based on the performance of the equipment. Subsequent SRs have been renumbered due to this change.

5. Changes are made which reflect the plant specific nomenclature.

6. ISTS LCO 3.1.9 includes an allowance to suspend the LCO 3.2.1 requirements associated with the restricted operation region only. It does not allow the plant to suspend the overlap and sequence limits of LCO 3.2.1. ITS LCO 3.1.9 allows the plant to also suspend the overlap and sequence limits. This addition is consistent with CTS 3.10.2, which allows the sequence and overlap limits to be suspended during physics tests.

7. Changes are made do reflect another Specification.

8. The allowance to not meet the APSR insertion limits (ITS LCO 3.2.2) during a PHYSICS TEST has been added to be consistent with the allowances provided to not meet insertion limits for the safety rods (ITS LCO 3,1.5) and the regulating rods (ITS LCO 3.2.1). This is also consistent with the current licensing basis (CTS 3.10.2).

9. ISTS 3.1.9 ACTION D was added after ISTS 3.1.9 ACTION C. However, since the ISTS 3.1.9 ACTION D Frequency is 30 minutes, it has been added before the ISTS 3.1.9. ACTION C. In addition, ISTS SR 3.1.9.2 was added after ISTS SR 3.1.9.1. However, since the ISTS SR 3.1.9.2 Frequency is 30 minutes, it has been added before the ISTS SR 3.1.9.1. These changes are consistent with the Improved Standard Technical Specifications, TSTF-GG-05-01, Sections 4.1.6.b and 4.1.7.a.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 211 of 307

Attachment 1, Volume 6, Rev. 1, Page 212 of 307 Improved Standard Technical Specifications (ISTS) Bases Markup and Justification for Deviations (JFDs)

Attachment 1, Volume 6, Rev. 1, Page 212 of 307

Attachment 1, Volume 6, Rev. 1, Page 213 of 307 PHYSICS TESTS Exceptions-- MODE 2 B 3.1.9 B3.A REACTIVITY CONTROL SYSTEMS 83.1.9 PHYSICS TESTS Exceptions .,MODE 2 BASES BACKGROUND The purpose, of this MODE 2 LCO is to permit PHYSICS.TESTS to be conducted by providing exbemptions4from the requirements of other LCOs..

Establishment of a test program to verify, that structures, systems, and components will perform satisfactorily in service is required by 1.0 CFR 50, Appendix B (Ref. 1). Testing is required as an integral part of the design, fabrication, construction, and operation of the power plant... All functions necessary to ensure that specified design conditions are not violated during normal operation and-anticipated operational occurrences must be tested. Requirements, for notification of the NRC, for the purpose of conducting tests and experiments, are specified in 10 CFR 50.59:

(Ref. 2).

The key objectives of a test program are to (Ref. 3):

a. Ensure that the facility has been adequately designedmii.----F 0

b.

c. Validate the analytical models used in the designand analysis Verify the assumptions used to predict unit response

d. Ensure that installation of equipment in the facility has been accomplished in accordance with the desig and 'I

e. Verify that the operating and emergency procedures are adequate.

To accomplish these objectives, testing is performed prior to initial criticality; during startup, low power operations, and power ascension; at high powers; and aftereach refueling, The PHYSICS TESTS requirements for reload fuel cycles ensure that the operating characteristics of the core are consistent with the design predictions, and that the core can be operated as designed (Ref. 4).

PHYSICS TESTS procedures arewritten and approved in accordance with established-guidelines. The procedures include all information necessary to permit a detailed execution of testing required to ensure that the design intent is met. PHYSICS TESTS .are performed in accordance with these procedures, and test results are approved prior to continued power escalation and long term power operation.

BVVOG STS .B 3.1.9-1 Rev. 3.0, 0/31/04 Attachment 1, Volume 6, Rev. 1, Page 213 of 307

Attachment 1, Volume 6, Rev. 1, Page 214 of 307 PHYSICS' TESTS Exceptions - MODE 2 B 3.1.9 BASES' BACKGROUND f(continued)

Examples of MODE 2 PHYJSICS T TS include determination of critical boron conhcentrat on,o 0 ROI RDgroup worth, and reactivity Coefficients.41-2 and 14.1-APPLICABLE Reference 5:defines: requirements for initial testingof -the facility, including SAFETY F PHYSICS TESTS."Tables 13-3 akd 13-4 ef. 6)-summarize the W01 ANALYSES post-initial fuel loading-low o er and o r test . Requirements for reload fuel cycle PHYSICS TESTS are given in Table 1 .of AN SMQS-19.6.1-1985i (Ref..4).

USARAppendix413B 0

precritical testing and post- Although these PHYSICS TESTS are generally crticality test, respectively accomplshed withinthe limits of all LCOs, conditions may occur when one or more of the LCOs Asummary of the PHYSICS must be suspended to make completion of PHYSICS TESTS possible or TESTS for each cycle are practical.

listed in Reference 7. pa tc l It isacceptable to suspend the following LCOs for PHYSICS TESTS because reactor protection. criteria are preserved by the LCOs.still maintained and by the SRs:

LCO 3.1.3, "Moderator Temperature Coefficient (MTC" LCO 3.1.4, "CONTROL ROD Group Alignment Limits.

"Safety Rod Insertion Limitsl

_ (

for the sequence and LCO 3.1.5, overlap limits, and the LCO 3.1 .6, "AXIAL POWER SHAPING ROD (APSR) Alignment Limit insertion limits . LCO 3 3.2.1, "Regulating Rod Insertion Limits"'lor the restricted operation L*j LCO 3.2.2. "AXIAL POWER region, onlyd SHAPING ROD (APSR) LCO 3.4.2, "RCS Minimum Temperature for Criticality."

Insertion Limits;" and Even if anac cident occurs during PHYSICS TESTS with one or more L-;Us suspended, fuel damage criteria are preserved because the limits on THERMAL POWER and shutdowncapability are maintained during the PHYSICSTESTS.

Shutdown capabilityis preserved by limiting maximum obtainable THERMAL. POWER .and maintaining adequate SDM, when in MODE 2 PHYSICS TESTS. In MODE 2, the Reactor Coolant System (RCS) temperature must. be within the narrow range instrumentation for plant control. The narrow range temperature instrumentation goes on scale at

520*F. Therefore, it.is considered safe to allowthe minimum RCS temperature to decrease to 520°F during MODE 2 PHYSICS TESTS, based on the. low probability of an accident occurring and on prior operating experience.

BWOG STS B 3.1J.9-2 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 214 of 307

Attachment 1, Volume 6, Rev. 1, Page 215 of 307 PHYSICS TESTS Exceptions - MODE 2 B 3.1.9 BASES APPLICABLE SAFETY ANALYSES (continued)

PHYSICS TESTS: include, measurement of core nuclear parameters or exercise of control components that affect process variables.

As described in LCO 3.07, compliance with Test Exceptions LCOs.is optional, and therefore no criteria of 10 CFR 50.36(c)(2)(ii) apply. Test Exceptions LCOs provide. flexibility to perform certain operations by appropriately modifying requirements of other LCOs. A discussion of the criteria satisfied for the other LCOs. is provided in their respective Bases.

LCO This LCO permits individual IROIR S to be positioned outside of 0 their specified group ali nm nt and withdrawal limits and to be assigned to other than specified Q [ groups during the performance. of 0 PHYSICS TESTS. In addition, this ECO permits verification of the (except for the insertion limits for the unacceptable operation region) k This LCOalso allows suspension of LCO 3.1.3, LCO 3.1.4, LCO 3.1.5, LCO 3.1.6, LCO 3.2.*, and LCQ 3.4.2, provided:

0

a. THERMAL.POWER is__5% RTP%

0 iFb. Nuclearerpowertrip:setpoints on the OPERABLE nuclear power 0 range channels are set to 5 25% RTP@J

c. Nuclear instrumentation high startup rate 0C 01ROl*

]withdrawal -D2 inhibit is OPERABLE_* .. ` TSTF lowest 5

d. SDM is maintained within the limits specified :in the COLRI4 f RO loop average~n temperature is Ž 520M-F. -

The limits of LCO 3.2.3 and LCO 3.2.4 do not apply in MODE 2.

Inhibiting 0CI~ RO ;0 withdrawal, based on startup rate, also. limits local linear heat rate (L0-R), departure from nucleate boiling ratio (DN.BR),

and peak RCS pressure during accidents .initiated from low power.

APPLICABILITY This LCO is applicable, when the reactor is either subcritical or critical with THERMAL POWER .5 5% RTP. The.Applicability is stated as "during PHYSICS TESTS initiated in MODE 2" to ensure that the 5% RTP

.maximum power level is not exceeded. :Should the THERMAL POWER exceed 5% RTP, and consequently the unit enter MODE 1, this BWVOG STS B 3.1.9-3 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 215 of 307

Attachment 1, Volume 6, Rev. 1, Page 216 of 307 PHYSICS TESTS Exceptions.- MODE 2 B 3.1.9 BASES APPLICABILITY (continued)

Applicability, statement prevents exiting this.Specification and its Required Actions. This LCO is applicable, for initial criticality or low power testing, as defined ;by Regulatory Guide 1.68..(Ref. 3). In MODE 1, Applicability of thisLCO is not required because LCO 3.1.8, "PHYSICS TESTS

-ME Exceptions'," addresses PHYSICS TESTS exceptions in MODE 1. In MODES 3, 4, 5, and 6, Applicability is not required because physics 0

testing is not performed in these MODES.

ACTIONS A.1 If THERMAL POWER exceeds 5% RTP, a positive reactivity addition could be occurring, and a nuclear excursion could result. To ensure that local LHR, DNBR, and RCS pressure limits are not violated, the reactor is tripped. The necessary prompt action requires manual operator action to open the CONTROL ROD drive trip breakers without attempts to reduce THERMAL POWER by actuating the control system (i.e., CONTROL ROD insertion or RCS boration).

B.1 and B.2.

Since it is imperative to raise the If the SDM requirements are not met, boratio.n must be initiated promptly.

boron concentration of the RCS A Completion Time of 15 minutes is adequate for an Operator to correctly as soon as possible, the boron concentration should be a highly align and start the required systems andcornponents. The operator concentrated solution, such as should begin boration with the best source available for the plant that normally found in the boric acid addition tanks or the borated conditions. Boration will be continued until SDM is within limit. In the Swater storage tank. ýdetermination of the required combination of boration flow rate and boron jconcentration, there is no unique requirement that must be satisfied. 0 Suspension of PHYSICS TESTS exceptions requires restoratiOn of each of the applicable LCOs to within specification.

BERTT TTI Hig Flux111ýQ Hg Fu If the6nuc eareerpowe trip setpoint is > 25% RTP, then 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months is High Flux ()

allowed for the operator to restore the nuclear eyer owe trip setpoint within limits or to complete an orderly suspension. of PHYSICS TESTS exceptions. Suspension of PHYSICS TESTS exceptions requires restoration of each of the applicable individual LCOs to within BWOG STS B 3.1.9-4 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 216 of 307

Attachment 1, Volume 6, Rev. 1, Page 217 of 307 B 3.1.9 TST INSERT 1 0

If the RCS lowest loop average temperature is < [ 520 M]OF, then 30 minutes is allowed 0

for the operator to restore the RCS lowest loop average temperature to within limits or to complete an orderly suspension of PHYSICS TESTS exceptions. The required Completion Time is consistent with, or more conservative than, those specified in the individual LCOs addressed by the PHYSICS TESTS exceptions.

Insert Page B 3.1.9-4 Attachment 1, Volume 6, Rev. 1, Page 217 of 307

Attachment 1, Volume 6, Rev. 1, Page 218 of 307 PHYSICS TESTS Exceptions - MODE 2 B 3.1.9 BASES ACTIONS (continued) specification,ý in order to ensure that continuity of reactor operation is within initial condition: limits. Thislrequired'Completion Time is. consistent

.with, or moeb.conservative than, those specified for the individual LCOs addressed by .PHYSICS TESTS exceptions.

If the nuclear instrumentation high startup rate ROD

withdrawal inhibit function is inoperable, then 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months is allowed for the Q

operator to restore thefunction to OPERABLE status or to complete an orderly suspension of PHYSICS TESTS exceptions. Suspension of PHYSICS3TESTS. exceptions requires restoration of each of the applicable individual LCOs to within specification. This required Completion Time. is consistent with, or more conservative than, those specified~for the individual LCOs addressed by PHYSICS TESTS exceptions.

The nuclear instrumentation high startup rate ON ROL F withdrawal 0 inhibit function is- not required when-the reactor powier leveris above the operating range of the instrumentation channel. For example, if the reactor power level is above the source range channel operating fange, then only the intermediate range high startup rate ICO ROU ROD 0

withdrawal 'inhibit is required to be functional.

SURVEILLANCE SR 3.1.9.1 REQUIREMENTS Performing a CHANNEL FUNCTIONAL TEST on each nuclear High Flux instrumentatiop source and intermediate range high startup rate H Flu O R*O withdra*wal inhibit and inuclearQverpower annel, ensures that'the instrumentation required to detect a deviation from THERMAL POWER or to detect.a high startup rate is OPERABLE.

Performing the test once within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , prior to initiating PHYSICS TESTS, ensures:that the instrUmentation is OPERABLE shortly before PHYSICS.TESTS begin and allows the operator to correct any instrumentation- problems. - I SR 3.1.9 TSTF 467I Verification that THERMAL POWER is _ 5% RTP ensures that an adequate marginis maintained between the THERMAL POWER level aowe trip setpoint. Hourly verification is adequate for the operator to determine any change in core conditions, such as xenon r:edistribution occurring after a THERMAL POWER reduction, that could cause. THERMAL POWER to exceed the specified limit.

BWOG STS B 3.1.9-5 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 218 of 307

Attachment 1, Volume 6, Rev. 1, Page 219 of 307 B 3.1.9 TSTP INSERT 2

~467 SR 3.1.9.2 0 Verification that the RCS lowest loop average temperature is > [52(1,1F will ensure that 0 the unit is[6operating in a condition that coýLd invalidat the safety analyse Verification of the RCS temperature at a Frequency of 30 minutes during the performance of the PHYSICS TESTS will ensure that thelII-I1 conditions of theEP5 Fan y§es are no ae LCOnsistent with the Lmo requirements Insert Page B 3.1.9-5 Attachment 1, Volume 6, Rev. 1, Page 219 of 307

Attachment 1, Volume 6, Rev. 1, Page 220 of 307 PHYSICS TESTS Excelptions - MODE 2 B .3.1.9 BASES SURVEILLANCE REQUIREMENTS (continued)

'SR 3. .9.'3 Verifica ion thatfthe specifie~for PHYSICS nuclear v6rp6wer'trip setpoinrtt is within the limit.

TES ensures that'core prot ction at the.

reduced ower level is establi hed andwill remain'in lace durihg.

PHYSIC TESTS. Performin the verification once pe 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months allows 0

the opera or adequate time for determining any degrad tion of. the establishe trip setpoint margin before and during PHY for adjusti the nuclear overpo er ICS TESTS and tripo.setpoint.

SR 3.1.9.4 The SDM is verified by performing .a .reactivity balance calculation, considering the following reactivity effects:

a. RCS boron concentratio

b. CONTROL ROD positio

c. RCS average temperature,,

0

d. Fuel burnup based on gross thermal energy generation 0

e. Samarium concentratio

f. Xenon concentratio

g. Isothermal

. temperature coefficient (OTC);when below the pointof adding heat (POAH) 0

h. Moderator defect, when above the POAHnd

i. Doppler defect, when above the POAH.

.Using the ITC accounts for Doppler reactivity inithis calculation when the reactor is.subcritical or critical but below the'POAH, and the fuel temperature will be changing at the same rate as the, RCS.

The Frequency of 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months sis based on the generally slow change in required boron concentration and on thelow probability of an accident occurring without the required S,1DM.

BVOG STS B 3.1.9-6 Rev. 3,0, 03/31/104 Attachment 1, Volume 6, Rev. 1, Page 220 of 307

Attachment 1, Volume 6, Rev. 1, Page 221 of 307 PHYSICS&TESTS Exceptions - MODE 2 B 3.1.9 0 'BASES REFERENCES 1. 10 CFR 50, Appendix B, Section XI.

2: 10CFR50.59.

3. Regulatory Guide 1.68, Revision 2, August198Sl*IUFSAApni4B 1978.

4. ANSI"ANS-19.6.1'-k985 Decerbi 13,1985. 0

5. FSAR, Section 14.1-2and14.1-3 00

6. FSAR, atio,[13.48, able 3\3 an& Table\13-4j. :00 0

BVOG STS B 3.1.9-7 Rev. 3.0, 03/31/04 Attachment 1, Volume 6, Rev. 1, Page 221 of 307

Attachment 1, Volume 6, Rev. 1, Page 222 of 307 JUSTIFICATION FOR DEVIATIONS ITS 3.1.9 BASES, PHYSICS TESTS EXCEPTIONS - MODE 2

1. These punctuation corrections have been made consistent with the Writer's Guide for the Improved Standard Technical Specifications, TSTF-GG-05-01, Section 5.1.3.

2. Typographical error corrected.

3. Changes are made (additions, deletions, and/or changes) to the ISTS Bases which reflect the plant specific nomenclature, number, reference, system description, analysis, or licensing basis description.

4. The brackets have been removed and the proper plant specific information/value has been provided.

5. Changes are made to reflect the Specification.

6. Changes are made to reflect changes made to the Specification.

7. Changes are made to be consistent with other places in the Bases (i.e., LCO 3.1.1 Required Action A.1).

8. The Bases for ISTS SR 3.1.9.1 have not been deleted as required by TSTF-467, since the Surveillance discussed in the Bases has been retained in the Davis-Besse ITS. Furthermore, the SRs have been renumbered, consistent with their order in ITS.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 222 of 307

Attachment 1, Volume 6, Rev. 1, Page 223 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 223 of 307

Attachment 1, Volume 6, Rev. 1, Page 224 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS ITS 3.1.9, PHYSICS TESTS EXCEPTIONS - MODE 2 There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 224 of 307

Attachment 1, Volume 6, Rev. 1, Page 225 of 307 ATTACHMENT 10 Relocated/Deleted Current Technical Specifications (CTS)

Attachment 1, Volume 6, Rev. 1, Page 225 of 307

Attachment 1, Volume 6, Rev. 1, Page 226 of 307 0 .CTS 3/4.1.1.2, BORON DILUTION Attachment 1, Volume 6, Rev. 1, Page 226 of 307

Attachment 1, Volume 6, Rev. 1, Page 227 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs) 0 Attachment 1, Volume 6, Rev. 1, Page 227 of 307

Attachment 1, Volume 6, Rev. 1, Page 228 of 307 CTS 3/4.1.1.2 II REACTIVITY CONTROL SYSTEMS BORON DILU ION 3.1.1.2 i

LIMITING C NDITION FOR OPE RATION I he flow rate of reactor, oolant through the Reacto shall *be 2800 gpm whenever a red ction: in Reactor Coolant concentra ion is being made.*

ICoolant System ystem. boron APPLICABI ITY: All MODES.

ACTION:

With the flow rate of reactor coo ant through the Reactor C olant System

< 2800 g m, immediately suspend a 1 operations. involving a eduction in boron concentr tion of the Reactor Cool *nt System.

SURVEILL NCE REOUIREMENTS .

i 4.1.1.2 The flow rate of reacto coolant through the Reac or Coolant System shall b determined to be > 2800 gpm within one hour prio to the start of and REQUIREMENTS

at leas once per hour during a eduction in the Reactor.. oolant System boron SURVEILI!,NICE concent ation by either:

. Verifying at least ne reactor coolant pump i in operation, or LO

. Verifying that at 1 ast one DHR pump is in op ration and supplying

> 2800 gpm to the R actor Coolant System.

In M DE 5 or MODE 6 the React r Coolant System (RCS) b ron concentration may be gr ater than the boron conc ntrationof water availab e for addition. If the-.f.owrate of-reactor coolan through the RCS is less han 2800 gpm, water of o1 er boron concentration .t an the existing RCS conce tration may be added to th RCS provided that in MO E 5 the boron concentrati n of the water to be added is equal to or greater t *an the boron concentrati n associated with the SHUTD WN MARGIN requirement of Specification 3.1.1.1.,

in MODE 6 the boron conce tration of the water to e added fs equal to or g eater than the boron conc tration corresponding t the more restrictive rea tivity condition specified in Specification 3. J.-

DAV S-BESSE, UNIT 1 3/4.1-3 Amendment No. Y70,;188 0S Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 228 of 307

Attachment 1, Volume 6, Rev. 1, Page 229 of 307

DISCUSSION OF CHANGES CTS 3/4.1.1.2, BORON DILUTION ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES L01 (Category 1 -Relaxation of LCO Requirements) CTS 3.1.1.2 requires the flow rate of reactor coolant through the Reactor Coolant System to be greater than or equal to 2800 gpm whenever a reduction in Reactor Coolant System boron concentration is being made. With the flow rate not within limit, immediate suspension of all operations involving a reduction in boron concentration of the Reactor Coolant System is required. CTS 4.1.1.2 requires the flow rate of.

reactor coolant through the Reactor Coolant System to be monitored within one hour prior to the start and at least once per hour during a reduction in the Reactor Coolant System boron concentration. The ITS does not include this Specification. This changes the CTS by eliminating this Specification.

The purpose of CTS 3.1.1.2 is to ensure there is enough flow to support adequate mixing, prevent stratification, and ensure that reactivity changes will be gradual during boron concentration reductions in the Reactor Coolant System.

This flow rate will circulate a volume of 12,110 cubic feet of Reactor Coolant System volume in approximately 30 minutes. Therefore, the reactivity change rate associated with boron reductions will therefore be within the capability for operator recognition and control.

This change is acceptable since the ITS contains several Specifications, each applicable during different MODES of operations, that require a certain number of Reactor Coolant System and/or decay heat removal loops to be OPERABLE and in operation regardless of whether or not a reduction in Reactor Coolant System

boron concentration is being made. These ITS Specifications also include the appropriate Surveillance to ensure the loops are OPERABLE and in operation.

The flow limit is not included in most of the ITS Specifications because the capacity of the Reactor Coolant System pumps is significantly greater than 2800 gpm and because operation of the Decay Heat Removal System is controlled by plant operating procedures to ensure adequate flow.

Davis-Besse Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 229 of 307

Attachment 1, Volume 6, Rev. 1, Page 230 of 307 DISCUSSION OF CHANGES CTS 3/4.1.1.2, BORON DILUTION In MODES 1 and 2, if any Reactor Coolant System loop is not OPERABLE and in operation, ITS LCO 3.4.4 ACTION B requires the unit to be in MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . If the unit is operating in MODES 3, 4, and 5 (with the Reactor Coolant System loops filled) and the required loops are not in operation, the associated ITS LCOs provide limitations that prohibit operations that would cause introduction of coolant with boron concentration less than required to meet SDM of ITS LCO 3.1.1. In MODE 5 with the Reactor Coolant loops not filled, ITS LCO 3.4.8 requires two decay heat removal loops to be OPERABLE and one loop is required to be in operation. ITS LCO 3.4.8 also prohibits operations that can cause introduction of coolant with boron concentration less than required to meet ITS LCO 3.1.1 and prohibits draining operations that could further reduce the Reactor Coolant System water volume. If the unit is operating in MODE 6 with high reactor water level, ITS LCO 3.9.4 requires one decay heat removal loop to be OPERABLE and in operation. ITS LCO 3.9.4 also prohibits operations that would cause introduction of coolant with boron concentration less than required to meet ITS LCO 3.9.1. If the unit is operating in MODE 6 with low reactor water level, ITS LCO 3.9.5 requires two decay heat removal loops to be OPERABLE and one loop is required to be in operation. ITS LCO 3.9.5 also prohibits operation that would cause introduction of coolant with boron concentration less than required to meet ITS LCO 3.9.1 and prohibits draining operations which can further reduce the Reactor Coolant System water volume.

Since the requirements have been included in various Specifications, the change is appropriate. This change is designated as less restrictive because less stringent LCO requirements (explicit flow rates) are being applied in the ITS than were applied in the CTS.

Davis-Besse Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 230 of 307

Attachment 1, Volume 6, Rev. 1, Page 231 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 231 of 307

Attachment 1, Volume 6, Rev. 1, Page 232 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.1.1.2, BORON DILUTION There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 232 of 307

, Volume 6, Rev. 1, Page 233 of 307 CTS 3/4.1.2.1, FLOW PATHS - SHUTDOWN , Volume 6, Rev. 1, Page 233 of 307

Attachment 1, Volume 6, Rev. 1, Page 234 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 234 of 307

Attachment 1, Volume 6, Rev. 1, Page 235 of 307 CTS 3/4.1.2.1 EAC O OLSYS MS aM4.,12 BOR ONSYSTEMS WLIMITIN -.SHNUTDONF LIMiTIG C NDMTON FOR OPERATIO 3.31.2.1 At le t one of the following boron njection flow paths shall be PERABLE.

a. A flow path from: the conce trated boric acid storage syst via a boric acid pump and a makeup or decay heat emoval (DHR) pump to the eactor Coolant System, if only the boric acid storag system is OPERABLE, or I

b. A flow path from the borat water storage tank via a m cup or DHR pump to the Reactor Coolant System if nly the borated water storage tank is OPERABLE. I APPLICABIITY: MODES 5 and 6.

ACTION:

Withmnone o the above flow paths OPE LE, suspend all operation involving CORE ALTERATI NS or positive reactivity ch ges until at least one injecti n path is restored to OPERAB status.

R--e SURVEIL_NCE REQUIREMENTS 4.1.2.1 At east one of the above requir flow paths shall be demonst ated OPERABLE:

a. At least once per 7 days(0 by verifying that the pipe te perature of the heat traced portion of the flow path i 2 105TF when a flow path frm the concentrated boric acid storage system is usl, and

b. At least once per 31 day by verifying that each valve manual, power operated or automatic) in the flow p th that is not locked, sealed o otherwise secured in position is in its correct osition.

(Q)Ifthe 7 ay verification falls during ansfers of makeup water or d lute boron solutions (fluid source co0 centration of less than 5000 ppmB), the verification perio may be extended up to 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months aft r the addition of dilute boron solution has been stopped fo a period of at least 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

DAVIS- ESSE, UNIT 1 3/4 1-6 Amendment No. 67, 23 Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 235 of 307

Attachment 1, Volume 6, Rev. 1, Page 236 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.1, FLOW PATHS - SHUTDOWN ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS R01 CTS 3/4.1.2.1 provides requirements on the Boration System flow paths during shutdown. CTS 3.1.2.1 requires a flow path from the concentrated boric acid storage system via a boric acid pump and a makeup or decay heat removal (DHR) pump to the Reactor Coolant System if only the boric acid storage is OPERABLE or a flow path from the borated water storage tank via a makeup or DHR pump to the Reactor Coolant System if only the borated water storage tank is OPERABLE. The boration subsystems of the Makeup and Purification System and Chemical Addition System provide the means to control the chemical neutron absorber (boron) concentration in the RCS and to help maintain the SHUTDOWN MARGIN. The ITS does not include this Specification. This changes the CTS by relocating this Specification to the Technical Requirements Manual (TRM).

This change is acceptable because CTS 3/4.1.2.1 does not meet the 10 CFR 50.36(c)(2)(ii) criteria for inclusion into the ITS.

10 CFR 50.36(c)(2)(ii) Criteria Evaluation:

1. The boration subsystems are not used for, nor are capable of, detecting a significant abnormal degradation of the reactor coolant pressure boundary prior to a DBA.

2. The boration subsystems are not used to indicate status of, or monitor a process variable, design feature, or operating restriction that is an initial condition of a DBA or transient.

3. The boration subsystems are not part of a primary success path in the mitigation of a DBA or transient. The Emergency Core Cooling System required boration capability for mitigation of DBAs is covered in LCO 3.5.4, "Borated Water Storage Tank (BWST)."

4. As discussed in B&W Owners Group Technical Report 47-1170689-00 (Appendix A pages A-3 through A-6), the loss of the boration subsystems was found to be non-significant risk contributor to core damage frequency and offsite releases. Davis-Besse has reviewed this evaluation, considers it applicable to Davis-Besse Nuclear Power Station, and concurs with the assessment.

Davis-Besse Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 236 of 307

Attachment 1, Volume 6, Rev. 1, Page 237 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.1, FLOW PATHS - SHUTDOWN Since the 10 CFR 50.36(c)(2)(ii) criteria have not been met, the Flow Paths - Shutdown LCO and Surveillances may be relocated out of the Technical Specifications. The Flow Paths - Shutdown Specification will be relocated to the TRM. The TRM is currently incorporated by reference into the UFSAR, thus any changes to the TRM are made under 10 CFR 50.59, which ensures changes are properly evaluated. This change is designated as relocation because the Specification did not meet the criteria in 10 CFR 50.36(c)(2)(ii) and has been relocated to the TRM.

REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None Davis-Besse Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 237 of 307

Attachment 1, Volume 6, Rev. 1, Page 238 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 238 of 307

Attachment 1, Volume 6, Rev. 1, Page 239 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.1.2.1, FLOW PATHS - SHUTDOWN There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 239 of 307

, Volume 6, Rev. 1, Page 240 of 307 CTS 3/4.1.2.2, FLOW PATHS - OPERATING , Volume 6, Rev. 1, Page 240 of 307

Attachment 1, Volume 6, Rev. 1, Page 241 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 241 of 307

Attachment 1, Volume 6, Rev. 1, Page 242 of 307 CTS 3/4.1.2.2 S

REACT VITY CONTROL SYSTEMS FLO_,PATHS - OPERATING LIMIIING CONDITION FOR OPERATIO a.- A flow path from the

=oncentrated boricflow hall be OPERABLE:

3.1. .2 Each of the following boron injection acidpaths sto age system Via a boric a A ba.-flow path acid pump andfrom the r decayboncratedheat botr to the Reactor makeup removal i(DHR) pump san ic astorage ysataem viap a boric Coolant System, and 1b. A flow path from the borated water storage tank is makeup or DEHR pump to the Reactor Cool t System.

AP LICABILITY: MODES 1, 2, 3 and 4.

A ION:

a.

b. With inoperable, path rom the flowrestore the the concentrated inoperable boric cid storage system With flow path to OPERABLE status within the flow 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or in a least HOT STANDBY and bor ted to a SHUTDOWN MARGIN be path equivalent to 1% Ak from 2009F within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ; restore the k at the borated flow path to OPERAB status within water the next 7 days or be in COLD SHUTDOWN within th next 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . stor Re ge tank inoperable, restore the flow p th to OPERABLE status vithi one hour or be in at least HOT STANDBY ithin the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 h urs.

tURVEILLANCE REQUIREMENTS

.1.2.2 Each of the above required flow paths shall e demonstrated OPERABLE:

a. At least once per 7 days(1) by verifying tha the pipe temperature of the heat traced ortion of the flow path fro the concentrated boric acid storage sys em is > 105PF.

If the 7 day verifica on falls during transfers f makeup water or dilute I boron solutions (flui source concentration of le a than 5000 ppmB), the verification period m y be extended up to 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months after the addition of dilute boron solution has been stopped for a peri d of at least 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

DAVIS-BESSE, UNIT 1 3/4 1-7 Amendment No.,A IY71 135 Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 242 of 307

Attachment 1, Volume 6, Rev. 1, Page 243 of 307 CTS 3/4.1.2.2 ii REACTIVITY CONTROL SYSTEMS

~rtOVVtI I A II? iw~rrc ~ "UC citayriviAL krn"Tarmc"T . *4 .4

b. At least once per 31 days b verifying that each valve manual, power operated or automatic in the flow path that is n t locked, sealed, or otherwis secured in position, is in its correct position.

0 ROl DAVIS BESSE, uNIT 1 3/4 14am Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 243 of 307

Attachment 1, Volume 6, Rev. 1, Page 244 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.2, FLOW PATHS - OPERATING ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS R01 CTS 3/4.1.2.2 provides requirements on the flow paths during operation.

CTS 3.1.2.2 requires the a flow path from the concentrated boric acid storage system via a boric acid pump and a makeup or decay heat removal (DHR) pump to the Reactor Coolant System, and a flow path from the borated water storage tank via a makeup or DHR pump to the Reactor Coolant System to be OPERABLE. The boration subsystems of the Makeup and Purification System and Chemical Addition System provide the means to control the chemical neutron absorber (boron) concentration in the RCS and to help maintain the SHUTDOWN MARGIN. The ITS does not include this Specification. This changes the CTS by relocating this Specification to the Technical Requirements Manual (TRM).

This change is acceptable because CTS 3/4.1.2.2 does not meet the 10 CFR 50.36(c)(2)(ii) criteria for inclusion into the ITS.

10 CFR 50.36(c)(2)(ii) Criteria Evaluation:

1. The boration subsystems are not used for, nor are capable of, detecting a significant abnormal degradation of the reactor coolant pressure boundary prior to a DBA.

2. The boration subsystems are not used to indicate status of, or monitor a process variable, design feature, or operating restriction that is an initial condition of a DBA or transient.

3. The boration subsystems are not part of a primary success path in the mitigation of a DBA or transient. The Emergency Core Cooling System required boration capability for mitigation of DBAs is covered in LCO 3.5.4, "Borated Water Storage Tank (BWST)."

4. As discussed in B&W Owners Group Technical Report 47-1170689-00 (Appendix A pages A-3 through A-6), the loss of the boration subsystems was found to be non-significant risk contributor to core damage frequency and offsite releases. Davis-Besse has reviewed this evaluation, considers it applicable to Davis-Besse Nuclear Power Station, and concurs with the assessment.

Since the 10 CFR 50.36(c)(2)(ii) criteria have not been met, the Flow Paths - Operating LCO and Surveillances may be relocated out of the Technical Specifications. The Flow Davis-Besse Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 244 of 307

Attachment 1, Volume 6, Rev. 1, Page 245 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.2, FLOW PATHS - OPERATING Paths - Operating Specification will be relocated to the TRM. The TRM is currently incorporated by reference into the UFSAR, thus any changes to the TRM are made under 10 CFR 50.59, which ensures changes are properly evaluated. This change is designated as relocation because the Specification did not meet the criteria in 10 CFR 50.36(c)(2)(ii) and has been relocated to the TRM.

REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None Davis-Besse Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 245 of 307

Attachment 1, Volume 6, Rev. 1, Page 246 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 246 of 307

Attachment 1, Volume 6, Rev. 1, Page 247 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.1.2.2, FLOW PATHS - OPERATING There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 247 of 307

, Volume 6, Rev. 1, Page 248 of 307 CTS 3/4.1.2.3, MAKEUP PUMP - SHUTDOWN , Volume 6, Rev. 1, Page 248 of 307

Attachment 1, Volume 6, Rev. 1, Page 249 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 249 of 307

Attachment 1, Volume 6, Rev. 1, Page 250 of 307 CTS 3/4.1.2.3 REACTIV TY CONTROL SYSTEMS MAKUP PUMP - SHUTDOWN LIMIT1tG

I*...... CONDITION FOR r

i i iii*

.... OPERATION

i. ....................

3.1.2. At least one makeup pump in the boron injection flow path requir d by Specification 3.1.2.1 shall be OPERABLE and capab e of being owered from an OPERABLE es ential bus.

APPLI ABILITY: MODE 5*.

With o makeup pump OPERABLE, su pend all operations involvi g positive reac ivity changes until at leas one makeup pump is restore to OPERABLE stat s.

SUR EILLANCE REQUIREMENTS Re 4.1 2.3 No additional Surveil ance Requirements other tha those required by Spe ification 4.0.5 are applic ble.

With RCS pressure

150 ps g.

CDAVIS-BESSE, UNIT I 3/4 1-9 Amendment No.197 Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 250 of 307

Attachment 1, Volume 6, Rev. 1, Page 251 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.3, MAKEUP PUMP - SHUTDOWN

. ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS R01 CTS 3/4.1.2.3 provides requirements on the Boration System makeup pump during shutdown. CTS 3.1.2.3 requires at least one makeup pump in the boron injection flow path required by Specification 3.1.2.1 to be OPERABLE and capable of being powered from an OPERABLE essential bus. The boration subsystems of the Makeup and Purification System and Chemical Addition System provide the means to control the chemical neutron absorber (boron) concentration in the RCS and to help maintain the SHUTDOWN MARGIN. The ITS does not include this Specification. This changes the CTS by relocating this Specification to the Technical Requirements Manual (TRM).

This change is acceptable because CTS 3/4.1.2.3 does not meet the 10 CFR 50.36(c)(2)(ii) criteria for inclusion into the ITS.

10 CFR 50.36(c)(2)(ii) Criteria Evaluation:

1. The boration subsystems are not used for, nor are capable of, detecting a significant abnormal degradation of the reactor coolant pressure boundary prior to a DBA.

2. The boration subsystems are not used to indicate status of, or monitor a process variable, design feature, or operating restriction that is an initial condition of a DBA or transient.

3. The boration subsystems are not part of a primary success path in the mitigation of a DBA or transient. The Emergency Core Cooling System required boration capability for mitigation of DBAs is covered in LCO 3.5.4, "Borated Water Storage Tank (BWST)."

4. As discussed in B&W Owners Group Technical Report 47-1170689-00 (Appendix A pages A-3 through A-6), the loss of the boration subsystems was found to be non-significant risk contributor to core damage frequency and offsite releases. Davis-Besse has reviewed this evaluation, considers it applicable to Davis-Besse Nuclear Power Station, and concurs with the assessment.

Since the 10 CFR 50.36(c)(2)(ii) criteria have not been met, the Makeup Pump -

Shutdown LCO and Surveillances may be relocated out of the Technical Specifications.

The Makeup Pump - Shutdown Specification will be relocated to the TRM. The TRM is currently incorporated by reference into the UFSAR, thus any changes to the TRM are Davis-Besse Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 251 of 307

Attachment 1, Volume 6, Rev. 1, Page 252 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.3, MAKEUP PUMP - SHUTDOWN made under 10 CFR 50.59, which ensures changes are properly evaluated. This change is designated as relocation because the Specification did not meet the criteria in 10 CFR 50.36(c)(2)(ii) and has been relocated to the TRM.

REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None Davis-Besse -Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 252 of 307

Attachment 1, Volume 6, Rev. 1, Page 253 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 253 of 307

Attachment 1, Volume 6, Rev. 1, Page 254 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.1.2.3, MAKEUP PUMP - SHUTDOWN There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 254 of 307

Attachment 1, Volume 6, Rev. 1, Page 255 of 307 CTS 3/4.1.2.4, MAKEUP PUMPS - OPERATING 0

Attachment 1, Volume 6, Rev. 1, Page 255 of 307

Attachment 1, Volume 6, Rev. 1, Page 256 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 256 of 307

Attachment 1, Volume 6, Rev. 1, Page 257 of 307 CTS 3/4.1.2.4 REACTIVITY (NTROL SYSTEMS MAKEUP UMP - OPERATING LIMITING-coh.b. TI N .FO ..op RATION .... : ..... f.....

3..1-2.4 Tv o makeup pumps shall be OPE bBLE.

APPLICABILITY: MODES 1, 2, 3 and 4". .-

With only ne makeup pump OPERABLE, r store the inoperable pump t OPERABLE status wit in 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at le st HOT STANDBY and borated o a SHUTDOWN MARGIN eq iyalent to 1% Ak/k at 200OF within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ; re tore two pumps to PERABLE status within the n xt 7 days or be in COLD SHU DOWN within the next 0 hours0 days 0 hours 0 weeks 0 months .

SURE.ILL CE REQUIREMENTS 4.1.2.4 No additional Surveillance equirements other than tho e required by Specific tion 4.0.5 are applicable,

With CS pressure Ž 150 psig.

DAVIS BESSE, UNIT 1 3/4 1-10 mendment No. Y,197 Page 1 of I Attachment 1, Volume 6, Rev. 1, Page 257 of 307

Attachment 1, Volume 6, Rev. 1, Page 258 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.4, MAKEUP PUMPS - OPERATING ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS R01 CTS 3/4.1.2.4 provides requirements on the flow paths during operation.

CTS 3.1.2.4 requires two makeup pumps to be OPERABLE. The boration subsystems of the Makeup and Purification System and Chemical Addition System provide the means to control the chemical neutron absorber (boron) concentration in the RCS and to help maintain the SHUTDOWN MARGIN. The ITS does not include this Specification. This changes the CTS by relocating this Specification to the Technical Requirements Manual (TRM).

This change is acceptable because CTS 3/4.1.2.4 does not meet the 10 CFR 50.36(c)(2)(ii) criteria for inclusion into the ITS.

10 CFR 50.36(c)(2)(ii) Criteria Evaluation:

1. The boration subsystems are not used for, nor are capable of, detecting a significant abnormal degradation of the reactor coolant pressure boundary prior to a DBA.

2. The boration subsystems are not used to indicate status of, or monitor a process variable, design feature, or operating restriction that is an initial condition of a DBA or transient.

3. The boration subsystems are not part of a primary success path in the mitigation of a DBA or transient. The Emergency Core Cooling System required boration capability for mitigation of DBAs is covered in LCO 3.5.4, "Borated Water Storage Tank (BWST)."

4. As discussed in B&W Owners Group Technical Report 47-1170689-00 (Appendix A pages A-3 through A-6), the loss of the boration subsystems was found to be non-significant risk contributor to core damage frequency and offsite releases. Davis-Besse has reviewed this evaluation, considers it applicable to Davis-Besse Nuclear Power Station, and concurs with the assessment.

Since the 10 CFR 50.36(c)(2)(ii) criteria have not been met, the Makeup Pumps -

Operating LCO and Surveillances may be relocated out of the Technical Specifications.

The Makeup Pumps - Operating Specification will be relocated to the TRM. The TRM is currently incorporated by reference into the UFSAR, thus any changes to the TRM are made under 10 CFR 50.59, which ensures changes are properly evaluated. This Davis-Besse Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 258 of 307

Attachment 1, Volume 6, Rev. 1, Page 259 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.4, MAKEUP PUMPS - OPERATING change is designated as relocation because the Specification did not meet the criteria in 10 CFR 50.36(c)(2)(ii) and has been relocated to the TRM.

REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None Davis-Besse Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 259 of 307

Attachment 1, Volume 6, Rev. 1, Page 260 of 307 Specific No Significant Hazards Considerations (NSHCs)

S Attachment 1, Volume 6, Rev. 1, Page 260 of 307

Attachment 1, Volume 6, Rev. 1, Page 261 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.1.2.4, MAKEUP PUMPS - OPERATING There are no specific NSHC discussions for this Specification.

0 Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 261 of 307

Attachment 1, Volume 6, Rev. 1, Page 262 of 307 CTS 3/4.1.2.5, DECAY HEAT REMOVAL PUMP - SHUTDOWN Attachment 1, Volume 6, Rev. 1, Page 262 of 307

Attachment 1, Volume 6, Rev. 1, Page 263 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 263 of 307

Attachment 1, Volume 6, Rev. 1, Page 264 of 307 CTS 3/4.1.2.5 , Volume 6, Rev. 1, Page 264 page 1 of 1 of 307

Attachment 1, Volume 6, Rev. 1, Page 265 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.5, DECAY HEAT REMOVAL PUMP - SHUTDOWN ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS R01 CTS 3/4.1.2.5 provides requirements on the boration system decay heat removal pump during shutdown. CTS 3.1.2.5 requires at least one decay heat removal (DHR) pump in the boron injection flow path required by Specification 3.1.2.1 or 3.1.2.2 to be OPERABLE and capable of being powered from an OPERABLE essential bus. The boration subsystems of the Makeup and Purification System and Chemical Addition System provide the means to control the chemical neutron absorber (boron) concentration in the RCS and to help maintain the SHUTDOWN MARGIN. The ITS does not include this Specification. This changes the CTS by relocating this Specification to the Technical Requirements Manual (TRM).

This change is acceptable because CTS 3/4.1.2.5 does not meet the 10 CFR 50.36(c)(2)(ii) criteria for inclusion into the ITS.

10 CFR 50.36(c)(2)(ii) Criteria Evaluation:

1. The boration subsystems are not used for, nor are capable of, detecting a significant abnormal degradation of the reactor coolant pressure boundary prior to a DBA.

2. The boration subsystems are not used to indicate status of, or monitor a process variable, design feature, or operating restriction that is an initial condition of a DBA or transient.

3. The boration subsystems are not part of a primary success path in the mitigation of a DBA or transient. The Emergency Core Cooling System required boration capability for mitigation of DBAs is covered in LCO 3.5.4, "Borated Water Storage Tank (BWST)."

4. As discussed in B&W Owners Group Technical Report 47-1170689-00 (Appendix A pages A-3 through A-6), the loss of the boration subsystems was found to be non-significant risk contributor to core damage frequency and offsite releases. Davis-Besse has reviewed this evaluation, considers it applicable to Davis-Besse Nuclear Power Station, and concurs with the assessment.

Since the 10 CFR 50.36(c)(2)(ii) criteria have not been met, the Decay Heat Removal Pump - Shutdown LCO and Surveillances may be relocated out of the Technical Specifications. The Decay Heat Removal Pump - Shutdown Specification will be Davis-Besse Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 265 of 307

Attachment 1, Volume 6, Rev. 1, Page 266 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.5, DECAY HEAT REMOVAL PUMP - SHUTDOWN relocated to the TRM. The TRM is currently incorporated by reference into the UFSAR, thus any changes to the TRM are made under 10 CFR 50.59, which ensures changes are properly evaluated. This change is designated as relocation because the Specification did not meet the criteria in 10 CFR 50.36(c)(2)(ii) and has been relocated to the TRM.

REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None Davis-Besse Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 266 of 307

Attachment 1, Volume 6, Rev. 1, Page 267 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 267 of 307

Attachment 1, Volume 6, Rev. 1, Page 268 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.1.2.5, DECAY HEAT REMOVAL PUMP - SHUTDOWN There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 268 of 307

, Volume 6, Rev. 1, Page 269 of 307 CTS 3/4.1.2.6, BORIC ACID PUMP - SHUTDOWN Attachment 1, Volume 6, Rev. 1, Page 269 of 307

Attachment 1, Volume 6, Rev. 1, Page 270 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 270 of 307

Attachment 1, Volume 6, Rev. 1, Page 271 of 307 CTS 3/4.1.2.6 REACTIVITY CONTROL SYSTEMS BO IC AC PUMP .SHUTDOW LIMITI!NG Cb)NDIT.ION FOR, O F,ERATION ........ :. . ::: .:. ...

3.1-2.6 At least one boric acid pump shall.b~e OPERABLE and capab e~of being powl red from an OPERABLE essential bus if only the flow path through the boric acic pump in Specification 3].1. lIais OPERABLE..

APPLICABI ITY: MODES 5 and 6..

With no ric acid pump OPERABLE as equired to complete the flo path of Specific tion 3.1.2.1a, suspend all perations involving CORE AL ERATIONS or positive reactivity changes until atleast one boric acid pump i restored to OPERABLE status.

SURVFEI I ANrF RFOITRFMFNT ROl 4.1.2.6 No additional Surveillance Requirements other than these required by !

t Specifi ation 4.0.5 are applicable rs c

DAVI BESSE, UNIT 1 3/4 1-12 endment No.197 Page I1 Of I Attachment 1, Volume 6, Rev. 1, Page 271 of 307

Attachment 1, Volume 6, Rev. 1, Page 272 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.6, BORIC ACID PUMP - SHUTDOWN ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS R01 CTS 3/4.1.2.6 provides requirements on the Boration System boric acid pump during shutdown. CTS 3.1.2.6 requires at least one boric acid pump to be OPERABLE and capable of being powered from an OPERABLE essential bus if only the flow path through the boric acid pump in Specification 3.1.2.1 a is OPERABLE. The boration subsystems of the Makeup and Purification System and Chemical Addition System provide the means to control the chemical neutron absorber (boron) concentration in the RCS and to help maintain the SHUTDOWN MARGIN. The ITS does not include this Specification. This changes the CTS by relocating this Specification to the Technical Requirements Manual (TRM).

This change is acceptable because CTS 3/4.1.2.6 does not meet the 10 CFR 50.36(c)(2)(ii) criteria for inclusion into the ITS.

10 CFR 50.36(c)(2)(ii) Criteria Evaluation:

1. The boration subsystems are not used for, nor are capable of, detecting a significant abnormal degradation of the reactor coolant pressure boundary prior to a DBA.

2. The boration subsystems are not used to indicate status of, or monitor a process variable, design feature, or operating restriction that is an initial condition of a DBA or transient.

3. The boration subsystems are not part of a primary success path in the mitigation of a DBA or transient. The Emergency Core Cooling System required boration capability foe mitigation of DBAs is covered in LCO 3.5.4, "Borated Water Storage Tank (BWST)."

4. As discussed in B&W Owners Group Technical Report 47-1170689-00 (Appendix A pages A-3 through A-6), the loss of the boration subsystems was found to be non-significant risk contributor to core damage frequency and offsite releases. Davis-Besse has reviewed this evaluation, considers it applicable to Davis-Besse Nuclear Power Station, and concurs with the assessment.

Since the 10 CFR 50.36(c)(2)(ii) criteria have not been met, the Boric Acid Pump -

Shutdown LCO and Surveillances may be relocated out of the Technical Specifications.

The Boric Acid Pump - Shutdown Specification will be relocated to the TRM. The TRM Davis-Besse Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 272 of 307

Attachment 1, Volume 6, Rev. 1, Page 273 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.6, BORIC ACID PUMP - SHUTDOWN is currently incorporated by reference into the UFSAR, thus any changes to the TRM are made under 10 CFR 50.59, which ensures changes are properly evaluated. This change is designated as relocation because the Specification did not meet the criteria in 10 CFR 50.36(c)(2)(ii) and has been relocated to the TRM.

REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None Davis-Besse Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 273 of 307

Attachment 1, Volume 6, Rev. 1, Page 274 of 307 Specific No Significant Hazards Considerations (NSHCs) 0 0

Attachment 1, Volume 6, Rev. 1, Page 274 of 307

Attachment 1, Volume 6, Rev. 1, Page 275 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.1.2.6, BORIC ACID PUMP - SHUTDOWN There are no specific NSHC discussions for this Specification.

0 Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 275 of 307

Attachment 1, Volume 6, Rev. 1, Page 276 of 307 CTS 3/4.1.2.7, BORIC ACID PUMPS - OPERATING Attachment 1, Volume 6, Rev. 1, Page 276 of 307

Attachment 1, Volume 6, Rev. 1, Page 277 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 277 of 307

, Volume 6, Rev. 1, Page 278 of 307 CTS 3/4.1.2.7 Page 1 of 1 , Volume 6, Rev. 1, Page 278 of 307

Attachment 1, Volume 6, Rev. 1, Page 279 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.7, BORIC ACID PUMPS - OPERATING ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS R01 CTS 3/4.1.2.7 provides requirements on the boric acid pumps during operation.

At least one boric acid pump in the boron injection flow path required by Specification 3.1.2.2a shall be OPERABLE and capable of being powered from an OPERABLE essential bus. The boration subsystems of the Makeup and Purification System and Chemical Addition System provide the means to control the chemical neutron absorber (boron) concentration in the RCS and to help maintain the SHUTDOWN MARGIN. The ITS does not include this Specification.

This changes the CTS by relocating this Specification to the Technical Requirements Manual (TRM).

This change is acceptable because CTS 3/4.1.2.7 does not meet the 10 CFR 50.36(c)(2)(ii) criteria for inclusion into the ITS.

10 CFR 50.36(c)(2)(ii) Criteria Evaluation:

1. The boration subsystems are not used for, nor are capable of, detecting a significant abnormal degradation of the reactor coolant pressure boundary prior to a DBA.

2. The boration subsystems are not used to indicate status of, or monitor a process variable, design feature, or operating restriction that is an initial condition of a DBA or transient.

3. The boration subsystems are not part of a primary success path in the mitigation of a DBA or transient. The Emergency Core Cooling System required boration capability for mitigation of DBAs is covered in LCO 3.5.4, "Borated Water Storage Tank (BWST)."

4. As discussed in B&W Owners Group Technical Report 47-1170689-00 (Appendix A pages A-3 through A-6), the loss of the boration subsystems was found to be non-significant risk contributor to core damage frequency and offsite releases. Davis-Besse has reviewed this evaluation, considers it applicable to Davis-Besse Nuclear Power Station, and concurs with the assessment.

Since the 10 CFR 50.36(c)(2)(ii) criteria have not been met, the Boric Acid Pumps -

Operating LCO and Surveillances may be relocated out of the Technical Specifications.

The Boric Acid Pumps - Operating Specification will be relocated to the TRM. The TRM is currently incorporated by reference into the UFSAR, thus any changes to the TRM are Davis-Besse Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 279 of 307

Attachment 1, Volume 6, Rev. 1, Page 280 of 307 DISCUSSION OF CHANGES CTS 3/4.1.2.7, BORIC ACID PUMPS - OPERATING made under 10 CFR 50.59, which ensures changes are properly evaluated. This change is designated as relocation because the Specification did not meet the criteria in 10 CFR 50.36(c)(2)(ii) and has been relocated to the TRM.

REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None Davis-Besse Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 280 of 307

Attachment 1, Volume 6, Rev. 1, Page 281 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 281 of 307

Attachment 1, Volume 6, Rev. 1, Page 282 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.1.2.7, BORIC ACID PUMPS - OPERATING There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 282 of 307

, Volume 6, Rev. 1, Page 283 of 307 CTS 314.1 .3.7, ROD PROGRAM , Volume 6, Rev. 1, Page 283 of 307

Attachment 1, Volume 6, Rev. 1, Page 284 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 284 of 307

Attachment 1, Volume 6, Rev. 1, Page 285 of 307 CTS 3/4.1.3.7 REA TIVITY CONTROL SYSTEMS RDPROGRAM ITING CONDITION FOR OPERATI N 3..3.7 Each control rod ass ~bly (safety. regulating an APSR) shall be pr grammed to operate in the ore location and rod group pecified in the CO E OPERATING LIMITS REPORT.

APLICABILITY: MODES 1* and 2*.

ATION.

th any control rod assembi not programmed to operate s specified above, e in HOT STANDBY within 1 ur.

U.RVE ILLANCE REQUIREMENTS I .1.3. 7

a. Each control rod assembly shall be demonstra ed to be programmed to operate in th specified core location an( rod-group by:

1. Selection an actuation from the control room and verification of movement f the proper rod as indicat, d by both the absolute and relativ position indicators:

a) For al control rod assemblies, aft*r the control rod drive atches are locked subsequen to test, reprogramming or mai tenance within the panels.

b) For sp cifically affected individu I rod assenblies follo ing maintenance, test, reco nection or modification of po er or instrumentation cable from the control rod drive control system to the contr I rod drive.

2. Verifying hat each cable that has bee disconnected has been properly m tched and reconnected to t specified control rod drive.

b. At least once each 7 days. verify that th control rod drive patch panels are lo ked.

See Special Test Exce tions 3.10.1 and 3.10.2.

DAVIS-BESSE, UNIT 1 3/4 1-30 Amendment No. ;;,144 (Next page is 3/4 1-33)

Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 285 of 307

Attachment 1, Volume 6, Rev. 1, Page 286 of 307 DISCUSSION OF CHANGES CTS 3/4.1.3.7, ROD PROGRAM

. ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS R01 CTS 3.1.3.7 requires each control rod assembly (safety, regulating, and APSR) to be programmed to operate in the core location and rod group specified in the COLR. CTS 4.1.3.7.a requires each control rod assembly to be demonstrated to be programmed to operate in the specified core location and rod group.

CTS 4.1.3.7.b requires verification that the control rod drive patch panels are locked every 7 days. If any control rod assembly is not programmed to operate as specified the plant must be in HOT STANDBY within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . The location of control rod assemblies is provided in the reload report for each fuel cycle, and are reflected as core location and rod group assignments in the COLR. These constraints on control rod assembly core locations and rod group assignments function to optimize core burnup and minimize local power peaking during operation. Programming (or "patching") of control rod assemblies is also determined by the reload report for each fuel cycle to ensure that adequate shutdown margin can be achieved when the control rods are tripped. Incorrect programming of control rod assemblies in regulating groups would be revealed during measurement of group rod worths performed during startup testing, and verification that control rod assemblies in safety groups are fully withdrawn is performed using the control rod position indication system. Unlatched control rod assemblies would be detected via core power tilt measurements during power escalation. When test, reprogramming, or maintenance of the control rod drive patch panel and associated cables and instrumentation is performed, control rod control "programming" is also validated. If rod assemblies are not programmed correctly at some point the applicable insertion, overlap, and alignment limit may not be met. The Technical Specifications still include appropriate compensatory actions for insertion, overlap, and alignment limits not met. This will ensure the safety analysis is met or the plant will be required to be shut down within the specified time frame. Therefore, this Specification does not meet the criteria for retention in the ITS; therefore, it will be retained in the Technical Requirements Manual.

This change is acceptable because CTS 3/4.1.3.7 does not meet the 10 CFR 50.36(c)(2)(ii) criteria for inclusion into the ITS.

10 CFR 50.36(c)(2)(ii) Criteria Evaluation:

1. Rod Program is not used for, nor capable of, detecting a significant abnormal degradation of the reactor coolant pressure boundary prior to a DBA.

0 Davis-Besse Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 286 of 307

Attachment 1, Volume 6, Rev. 1, Page 287 of 307 DISCUSSION OF CHANGES CTS 3/4.1.3.7, ROD PROGRAM

2. Rod Program is not a process variable that is an initial condition in a DBA or transient analyses.

3. Rod Program does not act as a part of a primary success path in the mitigation of a DBA or transient.

4. As discussed in Reference 3 (Appendix A pages A-13 through A-14), the loss of this Specification was found .to be non-significant risk contributor to core damage frequency and offsite releases. Davis-Besse has reviewed this evaluation, considers it applicable to Davis-Besse Nuclear Power Station, and concurs with the assessment.

Since the 10 CFR 50.36(c)(2)(ii) criteria have not been met, the Rod Program LCO and Surveillances may be relocated out of the Technical Specifications.

The Rod Program Specification will be relocated to the TRM. The TRM is currently incorporated by reference into the UFSAR, thus any changes to the TRM are made under 10 CFR 50.59, which ensures changes are properly evaluated. This change is designated as relocation because the Specification did not meet the criteria in 10 CFR 50.36(c)(2)(ii) and has been relocated to the TRM.

REMOVED DETAIL CHANGES None 0 LESS RESTRICTIVE CHANGES None Davis-Besse Page 2 of 2 Attachment 1, Volume 6, Rev. 1, Page 287 of 307

Attachment 1, Volume 6, Rev. 1, Page 288 of 307 Specific No Significant Hazards Considerations (NSHCs) 0 Attachment 1, Volume 6, Rev. 1, Page 288 of 307

, Volume 6, Rev. 1, Page 289 of 307 CTS 3/4.1.3.8, XENON REACTIVITY , Volume 6, Rev. 1, Page 289 of 307

Attachment 1, Volume 6, Rev. 1, Page 290 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 290 of 307

Attachment 1, Volume 6, Rev. 1, Page 291 of 307 CTS 3/4.1.3.8 0 RE.AC IVITY CONTROL SYSTEMS XENO-REACTIVITY LIMI ING CONDITION FOR OPERATI 3.1 spe

/

3.8 THERMAL POWER shall n t be increased above the po *er level .cutoff ified in 'the acceptable op rating limits for regulatin rod position pro ided in the CORE OPERATING LIMITS REPORT unless one of the folloowing co itions is satisfied:

a. Xenon reactivity is within 10 percent of the eq ilibrium value for RATED THERMAL P WER and is approaching stab lity., or

b. THERMAL POWER has b en within a range of 87 to 2. percent. of RATED THERMAL POWER for a period exceeding 2 ho rs in the soluble poison cont ol mode, excluding xenon f ee start-ups.

Ai PLICABILI.TY:: MODE 1.

A TION:

ith the requirements of th above specification not sa isfied, reduce THERMAL 0WER to less than or equal to the power level cutoff w thin 15 minutes.

-al SURVEILLANCE REQUIREMENTS 4.1.3.8 Xenon reactivity hall be determined to be within 10% of the equilibrium value for RAT THERMAL POWER and to be a proaching stability or it shall be determined that the THERMAL POWER has een in the range of 87 to 92% of RATED THERMA POWER for > 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months ,, prior to increasing THEILMAL POWER above the power lev

cutoff.

DAVIS-BESSE, UNIT 1 3/4 1-33 Amendment No. 144 Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 291 of 307

Attachment 1, Volume 6, Rev. 1, Page 292 of 307 DISCUSSION OF CHANGES CTS 3/4.1.3.8, XENON REACTIVITY ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES None RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES L01 (Category 1 - Relaxation of LCO Requirements) CTS 3.1.3.8 does not allow THERMAL POWER to be increased above the power level cutoff specified in the acceptable operating limits for regulating rod position provided in the COLR unless xenon reactivity is within 10% of the equilibrium value for RATED THERMAL POWER and is approaching stability or THERMAL POWER has been within a range of 87 to 92% RTP for a period exceeding 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months in the soluble poison control mode, excluding xenon free start-ups. The ITS does not include this Specification. This changes the CTS by eliminating this Specification.

CTS 3.1.3.8 provides the ability to prevent excessive power peaking by transient xenon at RATED THERMAL POWER. Originally, operating restrictions were imposed on all the Babcock and Wilcox units due to power peaking resulting from transient xenon. The restrictions, known as the "power level cutoff," represented a tradeoff between wider operational envelopes and achievable power level during xenon transients. The power level cutoff temporarily reduced the maximum power level for operation as power was increased during a xenon transient. The peaking considerations from transient xenon are now implicitly included in the Davis-Besse reload safety evaluation analysis, so that the power level cutoff has been raised to 100% RTP. This effectively eliminates the operational restrictions due to transient xenon. CTS 3.1.3.8 contains the power level cutoff requirements; however, the regulating rod insertion figures (required by CTS 3.1.3.6 and ITS 3.2.1) show the value has been increased to 100% RTP.

Therefore, this change is acceptable since improvements in core maneuvering analysis techniques have resulted in the restrictions of this Specification no longer being necessary to support core power peaking and rod insertion limits.

This change is designated as less restrictive because less stringent LCO requirements are being applied in the ITS than were applied in the CTS.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 292 of 307

Attachment 1, Volume 6, Rev. 1, Page 293 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 293 of 307

Attachment 1, Volume 6, Rev. 1, Page 294 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.1.3.8, XENON REACTIVITY There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 294 of 307

, Volume 6, Rev. 1, Page 295 of 307 CTS 3/4.10.3, REACTOR COOLANT LOOPS , Volume 6, Rev. 1, Page 295 of 307

Attachment 1, Volume 6, Rev. 1, Page 296 of 307 Current Technical Specification (CTS) Markup and Discussion of Changes (DOCs)

Attachment 1, Volume 6, Rev. 1, Page 296 of 307

Attachment 1, Volume 6, Rev. 1, Page 297 of 307 CTS 3/4.10.3 PEcrAt TE'ST UECEPTION2 REACTR0 COOLANT LOOPS LI~ZOCON:ITIOW.FOR OPJI0* ,.....N.

3.10.3 The limitat'ions of *pecification 3;4'.1 may be su* ptnded during the performance of STARTUP and HYSICS TESTS provided:.

a. The THERMAL POWER does not exceed 5Z of RATED POVER, and

b. The reactor trip etpoints on the.OPERABLE Hig Flux channels are set

< 2SZof RATED POWER.

APPyLICABrLT: MODE 2.

Vi th the THERMAL POVER gr ter than 5%. of RATED THERMAL PO.ER, immediately open the control rod drive tri breakers.

M0l 4.10.3.1 The THERMAL sshall be determined 'to b < 5% of RATED THERMAL POVER at least once per hour during STARTUP and PHYS CS TESTS.

4.10.3.2. Each High P1 -Channel shall be subjected o a CAMOIEL FUNCTIONAL TEST vithin 12 'hours prior t initiating startup or PEYSI S TESTS.

DAVIS-BESSEj. UNIT 1 3/4 10-3 Amendment No.. 135 S

Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 297 of 307

Attachment 1, Volume 6, Rev. 1, Page 298 of 307 DISCUSSION OF CHANGES CTS 3/4.10.3, REACTOR COOLANT LOOPS ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES M01 CTS 3/4.10.3 provides an exception to the reactor coolant loop requirements in CTS 3.4.1 in MODE 2 for the purpose of the performance of STARTUP and PHYSICS TEST provided the THERMAL POWER does not exceed 5% RTP and the reactor trip setpoints on the OPERABLE High Flux channels are set <25%

RTP. According to the Bases, this special test exception permits reactor criticality under various flow conditions and is required in order to perform certain startup and PHYSICS TESTS while at low THERMAL POWER levels. The ITS does not contain this special test exception. This changes the CTS by eliminating a special test exception.

This change is acceptable because this method of testing is no longer used. As a result, the CTS special test exception is not needed. This change is designated as more restrictive because an exception to the CTS is being deleted.

RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None 0

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 298 of 307

Attachment 1, Volume 6, Rev. 1, Page 299 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 299 of 307

Attachment 1, Volume 6, Rev. 1, Page 300 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.10.3, REACTOR COOLANT LOOPS There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 300 of 307

, Volume 6, Rev. 1, Page 301 of 307 CTS 3/4.10.4, SHUTDOWN MARGIN , Volume 6, Rev. 1, Page 301 of 307

Page 302 of 307 Attachment 1, Volumrfe 6, Rev. 1, (CTS) Markup and Current Technical Specification Discussion of Changes (DOCs) 302 of 307 Attachment 1, Volume 6, Rev. 1, Page

Attachment 1, Volume 6, Rev. 1, Page 303 of 307 CTS 3/4.10.4 SPECIAL TE1T EXCEPTIONS SHUTDOWN .MRG.N LIMITING C)DITION FOR OPERAT.JON ...... -

3.10.4 T e SHUTDOWN MARGIN requireme' t of Specification 3.1.1,.. *Aybe suspended for measurement, of control -od worth and shutdown margi provided:

a4 Reactivity equivalent to at least the highest estimated control rod orth is available for trip insertion from OPERABLE con rol rod(s),

and

b. All axial power shaping rod are withdrawn to at least 5% (indicated position) and OPERABLE.

APPLICAB LITY: MODE 2.

A*CTION:

a. With any safety or regulat ng control rod not fully in erted and With less than the above reacti ity equivalent available fo trip insertion or the axial power shaping rods not within their with awal limits, immediately initiate and ontinue boration at > 2.5 gp of.7875 ppm boric acid solution or it equivalent until the SHUTD WN MARGIN required by Specification 3.1.1.1 is restored.

b. With all safety or regula ing control rods fully inse ted and the M0i reactor subcritical by le s than the above reactivity equivalent, immediately initiate and :ontinue boration at > 25 gpn of 78.75 ppm boric acid solution or it; equivalent until thii SHUTD WN MA*RGIN required by Specificatior 3.1.1.1 is restored.

SURVEIL-ANC.E....REQUIREMENTS...

4.10.4 1 The position of each saf ty, regulating, and. axial p wer shaping, rod.

either partially or fully withdra shall be determined at le st once per 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

.4.10.4 2 Each safety or regulati g control rod not fully ins rted shall be demons rated capable of full inse tion when tripped from at 1 ast the 50%

withd wn position within 7days rior to reducing the SHUTDO N MARGIN to less than he limits of Specification .1.1.1.

DAVI -BESSE, UNIT 1 3/4 10-4 Amendment No. A 196 Page 1 of 2 Attachment 1, Volume 6, Rev. 1, Page 303 of 307

, Volume 6, Rev. 1, Page 304 of 307 CTS 3/4.10.4 Page 2 of 2 , Volume 6, Rev. 1, Page 304 of 307

Attachment 1, Volume 6, Rev. 1, Page 305 of 307 DISCUSSION OF CHANGES CTS 314.10.4, SHUTDOWN MARGIN ADMINISTRATIVE CHANGES None MORE RESTRICTIVE CHANGES M01 CTS 3/4.10.4 provides an exception to the SHUTDOWN MARGIN requirements in CTS 3.1.1.1 in MODE 2 for the purpose of measurement of control rod worth and shutdown margin provided the reactivity equivalent to at least the highest estimated control rod worth is available for trip insertion from OPERABLE control rod(s). According to the Bases, this special test exception is required to permit the periodic verification of the actual versus predicted core reactivity condition occurring as a result of fuel burnup or fuel cycling operations. The ITS does not contain this special test exception. This changes the CTS by eliminating a special test exception.

This change is acceptable because this method of testing is no longer used. As a result, the CTS special test exception is not needed. Other rod worth measurement techniques that do not violate the SHUTDOWN MARGIN requirements are used. This change is designated as more restrictive because an exception to the CTS is being deleted.

RELOCATED SPECIFICATIONS None REMOVED DETAIL CHANGES None LESS RESTRICTIVE CHANGES None Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 305 of 307

Attachment 1, Volume 6, Rev. 1, Page 306 of 307 Specific No Significant Hazards Considerations (NSHCs)

Attachment 1, Volume 6, Rev. 1, Page 306 of 307

Attachment 1, Volume 6, Rev. 1, Page 307 of 307 DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATIONS CTS 3/4.10.4, SHUTDOWN MARGIN There are no specific NSHC discussions for this Specification.

Davis-Besse Page 1 of 1 Attachment 1, Volume 6, Rev. 1, Page 307 of 307

v t e Letter Sequence Request
TAC:MD6398, Increase Flexibility in Mode Restraints, Addition of LCO 3.0.8, Inoperability of Snubbers, Deletion of E BAR Definition and Revision to RCS Specific Activity Tech Spec, Changes to Reflect Revision of 10 CFR 50.55A, Limit Inservice Testing Program SR 3.0.2 Application to Frequencies of 2 Years or Less, Eliminate Second Completion Times Limiting Time from Discovery of Failure to Meet an LCO, Correct Example 1.4-1, Containment Structural Integrity, TSTF-28, Correct LCO 3.0.6 Bases, Add Restriction for Lowest LOOP Tave During Mode 2 Physics Testing (Approved, Closed) TAC:MD6319, DC Electrical Rewrite - Update to TSTF-360, Eliminate Use of Term Core Alterations in Actions and Notes, Provide Actions for One Steam Supply to Turbine Driven Afw/Efw Pump Inoperable, DC Electrical Rewrite, Clarification of Required Features in 3.8.1 Actions (Approved, Closed)
Initiation Request, Request, Request, Request, Request, Request, Request Acceptance, Acceptance, Acceptance, Acceptance Supplement, Supplement Administration Meeting, Meeting, Meeting Questions 18 June 2008 20 June 2008 Answers 23 July 2008 3 September 2008 Results Approval Other: L-08-161, Copy of Applicable Portions of the NRC and Davis-Besse Improved Technical Specifications Conversion Website - Sections 3.0, 3.1, 3.2, 3.4, and 3.6 and Chapter 4.0, L-08-241, Attachment 1, Applicable Portions of the U.S. Nuclear Regulatory Commission (NRC) and Davis-Besse Nuclear Power Station (DBNPS) Improved. Technical Specification (ITS) Conversion Website, Section 3.5 RAIs, L-08-338, Copy of Improved Technical Specifications (ITS), L-08-378, Implementation of Improved Technical Specification Amendment No. 279, ML073531253, ML081350505, ML082000451, ML082270661, ML082270662, ML082270663, ML082270664, ML082270665, ML082270666, ML082270667, ML082270669, ML082270670, ML082600577, ML082840099, ML082900630, ML082900882, ML082910125
MONTHYEAR2008-02-04 [Table View]

ML081480466

Text

1.9 BACKGROUND

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