TSTF-04-04, TSTF-467, Revision 0, Add Restriction for Lowest Loop T(Ave) During Mode 2 Physics Testing.
| ML042520039 | |
| Person / Time | |
|---|---|
| Issue date: | 06/28/2004 |
| From: | Buschbaum D, Furio P, Infanger P, Morris B Technical Specifications Task Force |
| To: | Beckner W Division of Regulatory Improvement Programs |
| References | |
| NUREG-1430, TSTF-04-04 TSTF-467, Rev 0 | |
| Download: ML042520039 (14) | |
Text
TECHNICAL SPECIFICATIONS TASK FORCE TSTF A JOIV7T 0o vJvT S G6ROIP A C77V7TY June 28, 2004 TSTF-04-04 Dr. William D. Beckner, Director Operating Reactor Improvements Program Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
SUBJECT:
TSTF-467, Revision 0, "Add Restriction for Lowest Loop Tave during Mode 2 Physics Testing"
Dear Dr. Beckner:
Enclosed for NRC review is Revision 0 of TSTF-467, "Add Restriction for Lowest Loop Tae during Mode 2 Physics Testing."
This Traveler is only applicable to NUREG-1430, "Standard Technical Specifications - Babcock and Wilcox Plants," and adds a restriction on RCS loop average temperature during Mode 2 physics testing.
This restriction is credited in the Bases of the Specification as necessary to meet the accident analysis assumptions, but the restriction does not appear in the Specification. The change also corrects several errors in the Bases for the Specification.
We request that NRC review of TSTF-467 be granted a fee waiver pursuant to the provisions of 10 CFR 170.11. This Traveler meets the exemption requirement in 10 CFR 170.11(a)(1)(iii), in that it is "a means of exchanging information between industry organizations and the NRC for the specific purpose of supporting the NRC's generic regulatory improvements or efforts." In this case, the generic regulatory effort is NUREG-1430. The Traveler also meets the exemption criteria of 10 CFR 170.1 1(a)(1)(iii)(A)(1) and 10 CFR 170.11(a)(1)(iii)(C), in that it is specifically for the purpose of supporting NRC's development of generic guidance (i.e., NUREG-1430) and the primary beneficiary is not the requesting organization. This change provides no operational advantage and is only being submitted to improve and correct NUREG-1430. If this change is not granted a fee waiver, please inform us and we will withdraw the Traveler from NRC review.
Should vou have any questions. please do not hesitate to contact us.
Dennis Buschbaum (WOG) Bert Morris (BWROG)
Patricia Furio (CEOG) Paul Infanger W G)
Enclosure 11921 Rockville Pike, Suite 100, Rockville, MD 20852 [ewni Phone: 301-984-4400, Fax: 301-984-7600 mLW & OWNS'6R0 Oh Email: tstftexcelservices.com Owners Group kJ Administered by EXCEL Services Corporation
TSTF 04-04 June 28, 2004 Page 2 bcc: Dennis Buschbaum (WOG)
Patricia Furio (CEOG)
Bert Morris (BWROG)
Paul Infanger (BWOG)
Mike Leisure (BWOG)
Donald Hoffman (EXCEL)
Brian Mann (EXCEL)
BNN'OG-98, Rev. I TSTF467, Rev. 0 Technical Specification Task Force Improved Standard Technical Specifications Change Traveler Add Restriction for Lowest Loop Tave during Mode 2 Physics Testing NUREGs Affected: id 1430 0] 1431 0 1432 [ 1433 0 1434 Classification: 1)Correct Specifications Recommended for CLIIP?: No Correction or Improvement: Correction Industry
Contact:
Paul Infanger, (352) 563-4796, paul.infangerlpgnmail.com 1.0 Description NUREG 1430 LCO 3.1.9 is modified to add a restriction for lowest RCS loop average temperature at
[520] F when performing PHYSICS TESTS in MODE 2. LCO 3.1.9 permits suspending the RCS minimum temperature for criticality during PHYSICS TESTS in MODE 2. This additional restriction adds a minimum temperature for criticality when the LCO 3.4.2 requirements are suspended.
Additionally, erroneous information has been deleted from the Bases of SR 3.1.9.1.
2.0 Proposed Change An LCO restriction is added to LCO 3.1.9 for the minimum RCS loop average temperature. A corresponding Surveillance and action are also added. The Bases are modified to reflect these changes and to correct errors in the Bases for Surveillance 3.1.9.1.
3.0 Background
LCO 3.1.9 suspends the requirements of LCO 3.4.2, RCS Minimum Temperature for Criticality, but does not impose an additional restrictions on RCS minimum temperature. The test exception LCO 3.1.8 in NUREG-1431 contains a restriction on minimum RCS loop average temperature. (The test exceptions in NUREG-1432 do not suspend the minimum RCS loop average temperature requirement.)
4.0 Technical Analvsis The added restriction permits loop average temperature to be reduced slightly to perform required tests while still providing a minimum limit for criticality when the requirement of LCO 3.4.2 is suspended.
The additional restriction is necessary to ensure assumptions associated with suspending requirements are met during PHYSICS TESTS in MODE 2. The addition of this restriction is consistent with the Applicable Safety Analyses discussion in the Bases for LCO 3.1.9 which takes credit for maintaining the RCS temperature at [520] F.
The Bases for SR 3.1.9.1 discuss a CHANNEL FUNCTIONAL TEST. However, SR 3.1.9.1 is a verification of THERMAL POWER, not a CHANNEL FUNCTIONAL TEST. It appears that the proper Bases for SR 3.1.9.1 is the discussion in the Bases of SR 3.1.9.2. It also appears that the discussions for SR 3.1.9.2 and 3.1.9.3 are actually the discussions in B3.1.9.3 and 3.1.9.4, respectively. Please note that NUREG-1430 does not contain an SR 3.1.9.4. Therefore, this change also corrects the Surveillance Test Requirement Bases discussions so that they are associated with the proper SRs.
26-Jun-04 Traveler Rev. 3. Copyright (C) 2004, EXCEL Services Corporation. Use by EXCEL Services associates, utility clients, and the U.S. Nuclear Regulatory Commission is granted. All other use without written permission is prohibited.
BWOG-98, Rev. I TSTF467, Rev. 0 5.0 Reiulatorv Analvsis 5.1 No Si2nificant Hazards Consideration The TSTF has evaluated whether or not a significant hazards consideration is involved with the proposed generic change by focusing on the three standards set forth in 10 CFR 50.92, "Issuance of amendment,"
as discussed below:
- 1. Does the proposed change involve a significant increase in the probability or consequences of an accident previously evaluated?
Response: No.
The proposed change provides a restriction on minimum RCS loop average temperature during physics tests. Performance of physics tests is not an initiator to any accident previously evaluated.
Providing a limit on minimum RCS loop average temperature will ensure that systems are capable of performing their assumed mitigation functions. The proposed changes do not adversely affect accident the design assumptions, conditions, or configuration of the facility. The proposed changes do not alter or prevent the ability of structures, systems, and components (SSCs) from performing their intended function.
Therefore, it is concluded that this change does not significantly increase the probability of an accident previously evaluated.
- 2. Does the proposed change create the possibility of a new or different kind of accident from any accident previously evaluated?
Response: No.
The proposed change provides a restriction on minimum RCS loop average temperature during physics tests. This revision will not impact the accident analysis. No new or different accidents result. The changes do not involve a physical alteration of the plant (i.e., no new or different type of equipment will be installed) or a significant change in the methods governing normal plant operation. The changes do not alter assumptions made in the safety analysis.
Therefore, the possibility of a new or different kind of accident from any accident previously evaluated is not created.
- 3. Does the proposed change involve a significant reduction in a margin of safety?
Response: No.
The proposed change provides a restriction on minimum RCS loop average temperature during physics tests. The proposed change protects the assumptions of the safety analysis.
Therefore, it is concluded that this change does not involve a significant reduction in the margin of safety.
Based on the above, the TSTF concludes that the proposed change presents no significant hazards considerations under the standards set forth in 10 CFR 50.92(c), and, accordingly, a finding of "no significant hazards consideration" is justified.
26-Jun-04 Traveler Rev. 3. Copyright (C) 2004, EXCEL Services Corporation. Use by EXCEL Services associates, utility clients, and the U.S. Nuclear Regulatory Commission is granted. All other use without written permission is prohibited.
BWVOG-98, Rev. I TSTF4167, Rev. 0 BWOG-98, Rev. 1 TSTF-467, Rev. 0 5.2 Applicable Reg~ulatorv Requirements/Criteria The proposed change does not change the design requirements or the assumptions in the safety analysis. As a result, there is no effect on the applicabile regualtory requirements or criteria. In conclusion, based on the considerations discussed above, (1) there is reasonable assurance that the health and safety of the public wvill not be endangered by operation in the proposed manner, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the approval of the proposed change will not be inimical to the common defense and security or to the health and safety of the public.
6.0 Environmental Consideration A review has determined that the proposed change would not change a requirement with respect to installation or use of a facility component located within the restricted area, as defined in 10 CFR 20, or would not change an inspection or surveillance requirement. The proposed change does not involve (i) a significant hazards consideration, (ii) a significant change in the types or significant increase in the amounts of any effluent that may be released offsite, or (iii) a significant increase in individual or cumulative occupational radiation exposure. Accordingly, the proposed change meets the eligibility criterion for categorical exclusion set forth in 10 CFR 51.22(c)(9). Therefore, pursuant to 10 CFR 51.22(b), no environmental impact statement or environmental assessment need be prepared in connection with the proposed change.
7.0 References None Revision History OG Revision 0 Revision Status: Closed Revision Proposed by: Oconee Revision
Description:
Original Issue Owners Group Review Information Date Originated by OG: 09-Mar-98 Owners Group Comments:
ONS-027 7/10/98 - TSTF approves with modifications. Noel C. to make changes and send to Don H.
Owners Group Resolution: Superceeded Date: 09-Mar-98 OG Revision 1 Revision Status: Active Revision Proposed by: BWOG Revision
Description:
Revised to mark on Revision 2 pages and to have an SE quality justification.
26-Jun-04 Traveler Rev. 3. Copyright (C) 2004, EXCEL Services Corporation. Use by EXCEL Services associates, utility clients, and the U.S. Nuclear Regulatory Commission is granted. All other use without written permission is prohibited.
BWOG-98, Rev. 1 TSTF467, Rev. 0 BWOG-98, Rev. I TSTF-467, Rev. 0 OG Revision 1 Revision Status: Active Owners Group Review Information Date Originated by OG: 12-Jun-03 Owners Group Comments:
(No Comments)
Owners Group Resolution: Approved Date: 12-Jun-03 TSTF Review Information TSTF Received Date: 05-Sep-03 Date Distributed for Review: 05-Scp-03 OG Review Completed: Rj BWOG i WOG 0 CEOG i BWROG TSTF Comments:
BWOG only.
Remarked on ISTS Revision 3 pages.
TSTF Resolution: Approved Date: 22-Apr-03 NRC Review Information NRC Received Date: 28-Jun-04 Affected Technical Specifications LCO 3.1.9 PHYSICS TESTS Exceptions - MODE 2 LCO 3.1.9 Bases PHYSICS TESTS Exceptions - MODE 2 Action 3.1.9.D PHYSICS TESTS Exceptions - MODE 2 Change
Description:
New Condition Action 3.1.9.D Bases PHYSICS TESTS Exceptions - MODE 2 Change
Description:
New Condition SR 3.1.9.1 Bases PHYSICS TESTS Exceptions - MODE 2 SR 3.1.9.2 PHYSICS TESTS Exceptions - MODE 2 Change
Description:
New SR SR 3.1.9.2 PHYSICS TESTS Exceptions - MODE 2 Change
Description:
Renamed SR 3.1.9.3 SR 3.1.9.2 Bases PHYSICS TESTS Exceptions - MODE 2 26-Jun-04 Traveler Rev. 3. Copyright (C) 2004, EXCEL Services Corporation. Use by EXCEL Services associates, utility clients, and the U.S. Nuclear Regulatory Commission is granted. All other use without written permission is prohibited.
BWVOG-98, Rev. I TSTF-467, Rev. 0 SR 3.1.9.2 Bases PHYSICS TESTS Exceptions - MODE 2 Change
Description:
NewSR SR 3.1.9.3 PHYSICS TESTS Exceptions - MODE 2 Change
Description:
Renamed SR 3.1.9.4 26-Jun-04 Traveler Rev. 3. Copyright (C) 2004, EXCEL Services Corporation. Use by EXCEL Services associates, utility clients, and the U.S. Nuclear Regulatory Commission is granted. All other use without written permission isprohibited.
TSTF-467, Rev. 0 INSERT 1 D. RCS lowest loop average D.1 Suspend PHYSICS 30 minutes temperature not within TESTS exceptions.
limit.
INSERT 2 SR 3.1.9.2 Verify the RCS lowest loop average temperature is 2 30 minutes
[520]0 F.
INSERT 3 D. 1 If the RCS lowest loop average temperature is < [520]F, then 30 minutes is allowed 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 4 SR 3.1.9.2 Verification that the RCS lowest loop average temperature is 2 [520]OF will ensure that the unit is not operating in a condition that could invalidate the safety analyses. Verification of the RCS temperature at a Frequency of 30 minutes during the performance of the PHYSICS TESTS will ensure that the initial conditions of the safety analyses are not violated.
TSTF-467, Rev. 0
, PHYSICS TESTS Exceptions - MODE 2 3.1.9
- 3.19 REACTIVITY CONTROL SYSTEMS 3.1.9 PHYSICS TESTS Exceptions - MODE 2 LCO 3.1.9 During performance of PHYSICS TESTS, the requirements of:
LCO 3.1.3, "Moderator Temperature Coefficient,"
LCO 3.1.4, "CONTROL ROD Group Alignment Limits,"
LCO 3.1.5, "Safety Rod Insertion iUmits,"
LCO 3.1.6, "AXIAL POWER SHAPING ROD Alignment Limits,"
LCO 3.2.1, "Regulating Rod Insertion Limits," for the restricted 32 operation region only, and 4LCO 3.4.2, "RCS Minimum Temperature for Criticality'/'
may be suspended provided that:,
- a. THERMAL POWER is
- 5% RTP,
- b. Reactor trip setpoints on the OPERABLE nuclear overpower channels are set to s 25% RTP,
- c. Nuclear instrumentation high startup rate CONTROL ROD withdrawal Inhibit is OPERABLE, and
APPLICABILITY: During PHYSICS TESTS initiated in MODE 2.
ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. THERMAL POWER not A.1 Open control rod drive trip Immediately within limit. breakers.
B. SDM not within limit. B.1 Initiate boration to restore 15 minutes SDM to within limit.
AND B.2 Suspend PHYSICS TESTS 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> exceptions.
BWOG STS 3.1 .9-1 Rev. 3.0, 03/31/04
TSTF-467, Rev. 0 PHYSICS TESTS Exceptions - MODE 2 3.1.9 ACTIONS (continued)
CONDITION REQUIRED ACTION COMPLETION TIME C. Nuclear overpower trip C.1 Suspend PHYSICS TESTS 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> setpoint is not within exceptions.
limit.
OR Nuclear instrumentation high startup rate CONTROL ROD withdrawal inhibit Inoperable.
f7 cl IDMICII I Ahlri' Dg l IIOICA:ITO SURVEILLANCE FREQUENCY SR 3.1.9.1 Verify THERMAL POWER is
- 5% RTP. 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SR 3.1;9.0 Verify nuclear overpower trip setpoint is
- 25% RTP. 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> SR 3.1 .9T Verify SDM is within the limits specified in the 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> COLR.
\Isel1f BWOG STS 3.1.9-2 S Rev. 3.0, 03/31/04
TSTF-467, Rev. 0 PHYSICS TESTS Eceptions - 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 3.0.7, 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 tleir respective Bases.
LCO This LCO permits individual CONTROL RODS to ble positioned outside of their specified group alignment and withdrawal limils and to be assigned to other than specified CONTROL ROD groups during the performance of PHYSICS TESTS. In addition, this LCO permits verification of the fundamental core characteristics.
This LCO also allows suspension of LCO 3.1.3, LCO 3.1.4, LCO 3.1.5, LCO 3.1.6, LCO 3.2.1, and LCO 3.4.2, provided:
- a. THERMAL POWER is < 5% RTP,
- b. Nuclear overpower trip setpoints on the OPERABLE nuclear power range channels are set to s 25% RTP,
- c. Nuclear instrumentation high startup rate CONYROL ROD withdrawal inhibit is OPERABLE, g)
>I The limits of LCO 3.2.3 and LCO 3.2.4 do not apply in MODE 2.
Inhibiting CONTROL ROD withdrawal, based on stbrtup rate, also limits.
local linear heat rate (LHR), departure from nucleate boiling ratio (DNBR),
and peak RCS pressure during accidents Initiated from low power.
APPLICABILITY This LCO is applicable when the reactor is.either suibcritical or. critical with THERMAL POWER < 5% RTP. The Applicability ig 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 Rev. 3.0, 03/31/04 B 3.1.9-3 I BWOG STS STS B 3.1.9-3 ;Rev. 3.0, 03/31/04
TSTF-467, Rev. 0 PHYSICS TESTS Exceptions - MODE 2 B 3.1.9 BASES ACTIONS (continued) specification, in order to ensure that continuity of reactor operation Is within initial condition limits. This required Completion Time is consistent with, or more conservative than, those specified for the individual LCOs addressed by PHYSICS TESTS exceptions.
If the nuclear instrumentation high startup rate CONTROL ROD withdrawal inhibit function is inoperable, then 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> is allowed for the operator to restore the function to OPERABLE status 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 LCOs addressed by PHYSICS TESTS exceptions.
The nuclear instrumentation high startup rate CONTROL ROD withdrawal inhibit function is not required when the reactor power level is above the operating range of the instrumentation channel. For example, if the reactor power level is above the source range channel operating range, then only the intermediate range high startup rate CONTROL ROD
> withdrawal inhibit is required to be functional.
SURVEILLANCE SR 3.1.9.1 REQUIREMENT!
erming a CHA EL FUNCTIONAL TEST on e nuclear instrumentation s rce and Intermediate range Ii startup rate
(
CONTROL R withdrawal inhibit and nu r overpower channel, ensures t the instrumentation requ to detect a deviation fro THER L POWER or to detect a startup rate is OPERAB Pe ming the test once with 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, prior to Initiating P SICE STS, ensures that the rumentation Is OPERABL ortly befc PHYSICS TESTS bei and allows the operator to rect any instrumentation p ems.
Verification that THERMAL POWER is < 5% RTP ensures that an adequate margin is maintained between the THERMAL POWER level and the nuclear overpower trip setpoint. Hourly verification is adequate for the operator to determine any change in core conditions, such as xenon redistribution occurring after a THERMAL POWER reduction, that could cause THERMAL POWER to exceed the specified limit.
Rev. 3.0, 03/31104 B 3.1.9-5 BWOG STS STS B 3.1.9-5 Rev. 3.0, 03/31/04
TSTF-467, Rev. 0 PHYSICS TESTS Exceptions - MODE 2 B 3.1.9
-FSYI-BASES SURVEILLANCE REQUIREMENTS (continued)
SR 3.1.9.3 Verification that the nuclear overpower trip setpoint is within the limit specified for PHYSICS TESTS ensures that core protection at the reduced power level is established and will remain in place during PHYSICS TESTS. Performing the verification once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> allows the operator adequate time for determining any degradation of the established trip setpoint margin before and during PHYSICS TESTS and for adjusting the nuclear overpower trip setpoint.
SR 3.1.9.4 The SDM is verified by performing a reactivity balance calculation, considering the following reactivity effects:
- b. CONTROL ROD position,
- c. RCS average temperature,
- d. Fuel bumup based on gross thermal energy generation,
- e. Samarium concentration,
- f. Xenon concentration,
- h. Moderator defect, when above-the POAH, and
- i. Doppler defect, when above the POAH.
Using the ITC accounts for Doppler reactivity in this 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 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Is based on the generally slow change in required boron concentration and on the low probability of an accident occurring without the required SDM.
B 3.1.9-6 STS BWOG STS B 3.1.9-6 Rev. 3.0, 03/31/04
TSTF-467, Rev. 0 INSERT 1 D. RCS lowest loop average D.1 Suspend PHYSICS 30 minutes temperature not within TESTS exceptions.
limit.
INSERT 2 SR 3.1.9.2 Verify the RCS lowest loop average temperature is 2 30 minutes
[520]1F.
INSERT 3 D. 1 If the RCS lowest loop average temperature is < [520]°F, then 30 minutes is allowed 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 4 SR 3.1.9.2 Verification that the RCS lowest loop average temperature is > [520]OF will ensure that the unit is not operating in a condition that could invalidate the safety analyses. Verification of the RCS temperature at a Frequency of 30 minutes during the performance of the PHYSICS TESTS will ensure that the initial conditions of the safety analyses are not violated.