ML20207E185
| ML20207E185 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 05/27/1999 |
| From: | DUQUESNE LIGHT CO. |
| To: | |
| Shared Package | |
| ML20207E179 | List: |
| References | |
| NUDOCS 9906040186 | |
| Download: ML20207E185 (25) | |
Text
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ATTACIIMENT A-1 Beaver Valley Power Station, Unit No. 1 License Amendment Request No. 271 The following is a list of the affected pages:
Affected Pages:
3/4 3-29 3/4 3-29a 3/4 3-30 3/4 3-31 3/4 3-32 B 3/4 3-lh 9906040186 990527 PDR ADOCK 05000334 P
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l DPR-66 TABLE 4.3-2 (Continued)
TABLE NOTATION
~
r
.--._..n--
f(1)
Manual actuation switches shall be tested at least once per 18 months during shutdown.
All other circuitry associated with manual safeguards actuation shall receive a CHANNEL FUNCTIONAL TEST at least once per 31 days.
_~
(2)
Each train or logic channel shall be tested at least every j
other 31 days.
1 e
l BEAVER VALLEY - UNIT 1 3/4 3-32 (M
,N
DPR-66 IMBTRtBMMTATION BASES 3/4.3.1 and 3/4.3.2 mikun vz mun unaYverman m1FETY FEATN#8 fEEF)
INSTRLEMMTATION fcontinuad)
A CHANNEL CTIONAL TEST is performed on each required channel LSvery 92 days) to ensure the entire channel will perform the intended function.
Setpoints must be within the Allowable Values.
The frequency of 92 days is justified in WCAP-102_71-7-A,Jupplement 2, Rev. 1, June 1990.
f Cettdn che$nels)
This surveillance is modified by a Note that specifies testing when below P-6 and is clarified to address the transition from NODE 2 to MODE 3.
A transition into MODE 3 with the reactor trip breakers H
closed is often ande for a short period of time during plant L
I shutdown.
During a normal shutdown, the reactor trip breakers are
' it opened shortly after entering MODI 3.
The transition time in MODE 3 4
from when the reactor trip breakers are closed to when they are k,'
I opened is less than the time required to perform the CHANNEL l
FUNCTIONAL TEST prior to entering MODE 3.
Therefore, an allowance Q'
to enter MODE 3 without first performing the source range CHANNEL FUNCTIONAL TEST is warranted.
cEAMMEL c1LImaATIost The alternate source range detectors are modified by a note to indicate they are not subject to the source range detector surveillance requiremente until they have been connected to the applicable circuits and are required to be OPERABLE.
This complies with the testing requirements for components that are required to be OPEllABLE.
A CHANNEL CALIBRATION is performed every 18 nonths, or approximately at every refueling.
The (X&IgrEL CALIBRATION for the source range neutron detectors consists of obtaining the detector plateau and preamp discr1Jainator
- curves, evaluating these
- curves, and establishing detector operating conditions as directed by the detector manufacturer.
The 18 month frequency is based on the need to perform this surveillanos under the conditions that apply during a plant outage sinoe performanos at power is not possible.
The protection and monitoring functions are also calibrated at an is month frequency as is normal for reestor protection instrument channels.
Operating experience has shown these components usually pass the surveillance when performed on the is month frequency.
BEAVER VALLEY - UNIT 1 5 3/4 3-lh Amendment No. 217 (cpded (dofb
r Attccirmnt A-1 Daaver vollcy Pow 0r Staticn, Unit No. 1 License Amendment Reauest No. 271 i
BASES INSERT 1 l
When performing the CHANNEL FUNCTIONAL. TEST for manual initiation functions, the injection of a simulated signal into the channel as close to the primary sensor as practicable is accomplished by manually operating the function's manual switch (es).
ATTACHMENT A-2 Beaver Valley Power Station, Unit No. 2 License Amendment Request No. 147 The following is a list of the affected pages:
l Affected'Pages:
3/4 3-33 3/4 3-34 3/4 3-35 3/4 3-36 3/4 3-37 3/4 3-38 B 3/4 3-9
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NPF-73 TABLE 4.3-2 (Continued)
TABLE NOTATI0ff (1) Manualactuationswitchesshallbetestedabeastonceper18 months during shutdown.
This 18-month surveillance interval during the first fuel cycle may be extended to coincide with completion of the first refueling outage for Containment Spray, Safety Injection and Feedwater Isolation and Phase B Isolation manual actuation switches.
All other circuitry associated with manual safeguards actuation shall receive a Q HANNEL FUNCTIONAL TEST at least once per 31 days.
Each train or logic channel shall be tested at least every other 31 days.
p (3) The specified surveillance interval during the first fuel cycle may be
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extended to coincide with completion of the first refueling outage.
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BEAVER VALLEY - UNIT 2 3/4 3-33 Amendment No.10
NPF-73 3/4.3 INSTRUMENTATION BASES 3/4.3.1 and 3/4.3.2 n* N R TRID BYSTEM AND ENGINFFBFn E1Firl FEATUREE ACTUATION SYSTEM INSTRUMENTATION (Continued)
The frequency is based on operating experience that demonstrates channel failure is rare.
Thus, performance of the CHANNEL CHECK ensures that undetected overt channel failure is limited to 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
The CHANNEL CHECK supplements less formal, but more frequent, checks of channels during normal operational use of the displays associated with the LCO required channels.
When the control rods are fully inserted and are not capable of withdrawal, inadvertent control rod withdrawal is not a concern and one source range detector can adequately monitor the core.
CHAMMEL FUNCTIQMAL TERT The alternate source range detectors are modified by a note to indicate they are not subject to the source range detector surveillance requirements until they have been connected to the applicable circuits and are required to be OPERABLE.
This complies with the testing requirements for components _that are r_equired to be OPERABLE.
ggggy gg[g A
FUNCTIONAL TEST is perform on each required channel eve i
62 days) to ensure the entire che snel will perform the inten i
runction.
setpoints must be wi in the Allowable Values.
The frequency of 92 days is justifiedpin WCAF-10271-P-A, l
Supplement 2, Rev. 1, June 1990.
- l This surveillance is modified by a Note that specifies testing when below P-6 and is clarified to address the transition from NODE 2 to MODE 3.
A transition into MODE 3 with the reactor trip breakers h' /
closed is often ande for a short period of time during plant shutdown.
During a normal shutdown, the reactor trip breakers are h
opened shortly after entering NODE 3.
The transition time in NODE 3 I
gL from when the reactor trip breakers are closed to when they are W<
opened is less than the time required to perform the CHANNEL R
FUNCTIONAL TEST prior to entering NODE 3.
Therefore, an allowance to h
enter NODE 3 without first performing the source range CHANNEL y
FUNCTIONAL TEST is warranted.
CHANNEL CALIBRATIQM The alternate source range detectors are modified by a note to
-indicate they are not subject to the source range detector surveillance requirements until they have been connected to the applicable circuite and are required to be OPERABLE.
This complies with the testing requirements for components that are required to be OPERABLE.
BEAVER VALLEY - UNIT 2 5 3/4 3-9 Amendment No. 94 Qropecte=U9 6
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Att chncnt A-2 BeLvCr Volicy PowOr Staticn, Unit No. 2 License Amendment Reauest No. 147 SASES INSERT 1 When performing the CHANNEL FUNCTIONAL TEST for manual initiation functions, the injection of a simulated signal into the channel as close to the primary sensor as practicable is accomplished by manually. operating the function's manual switch (es).
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ATTACHMENT B Beaver Valley Power Station, Unit Nos. 1 and 2 License Amendment Request Nos. 271 and 147 REVISION OF ESFAS MANUAL INITIATION SURVEILLANCE FREQUENCY A.
DESCRIPTION OF AMENDMENT REQUEST This license amendment request revises the frequency for performing the CHANNEL FUNCTIONAL TEST (CFT) of the manual initiation functional units specified on Table 4.3-2 of the 1
Unit 1 and Unit 2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Technical Specification (TS).
The manual initiation functional units affected by this change are listed below:
UNIT 1 UNIT 2 1.a Safety Injection and 1.a Safety Injection and Feedwater Isolation Feedwater Isolation 1.1.s Safety Injection-2.a Containment Spray Transfer From Injection To The 3.a.1 Containment Isolation Recirculation Mode Phase "A" Isolation 2.a Containment Spray 3.b.1 Containment Isolation Phase "B" Isolation 3.a.1 Containment Isolation Phase "A" Isolation 4.a.1 Steam Line Isolation Manual Initiation 3.b.1 Containment Isolation Individual Phase "B"
4.a.2 Steam Line Isolation 4.a Steam Line Isolation Manual Initiation System The proposed change revises the current TS surveillance requirement for the manual initiation functions listed above to specify testing be performed on a refueling basis.
The current surveillance requirement specified for these functions requires that a CFT be performed monthly.
The monthly frequency specified in Table 4.3.2 for these functions is modified by Footnoto 1.
Footnote 1 of Table 4.3-2 states the following:
" Manual actuation switches shall be tested at least once per 18 months during shutdown.
All other circuitry associated with manual safeguards actuation shall receive a CHANNEL FUNCTIONAL TEST at least once per 31 days."
l The Unit 2 footnote also contains tbs following statement: "This 18 month surveillance interval during the first fuel cycle may be extended to coincide with completion of the first refueling outage for Containment Spray, Safety Injection and Feedwater J
ATTACHMENT B, continu d Licanos Amanda nt R3quact Nos. 271 and 147 Page 2 isolation and Phase B Isolation manual actuation switches."
This additional Unit 2 statement was only applicable for the first refueling. outage.
The proposed change is intended to eliminate the need for Footnote 1.
As such, this change deletes Footnote 1 on both the Unit.1 and 2 ESFAS TS Table 4.3-2.
Due to the elimination of Footnote 1, Footnote 2 on both_the Unit 1 and 2 Table 4.3-2 is renumbered to Footnote 1.
In addition, Unit 2 contains a third footnote that was also only applicabla during the first refueling outage.
The expired Unit 2 Footnote 3 on j
Table 4.3-2 is also deleted.
In order to clarify the application of the CFT surveillance requirement to manual initiation instrumentation, an addition has been made to the TS bases.
This i
addition describes the required testing for manual initiation functions.
In addition, the bases description of the CFT is revised to be more generically applicable to all the various applications of the CFT requirement in the TS.
l B.
DESIGN BASES i
The ESFAS Instrumentation initiates necessary safety systems to ensure design limits are not exceeded and to mitigate accidents.
Safety Injection (including the transfer from injection to recirculation mode of operation) functions primarily to mitigate the effects of high energy line breaks both inside and outside of containment.
Safety Injection provides primary side water additicts for the recovery and maintenance of reactor vessel water level to ensure continued heat removal and for limiting peak clad temperature.
In addition, safety Injection provides boration to ensure the recovery and maintenance of shutdown margin.
Feedwater Isolation functions to limit the flow of feedwater to the Steam Generators (SGs).
Limiting feedwater flow mitigates the effects of a high water level in the SGs, which could result in carryover of water into the steam lines and excessive cooldown of the primary system.
Containment Spray functions tc lower containment pressure and temperature after a high energy line break in containment and ensures the subsequent return to subatmospheric pressure.
Limiting containment pressure and temperature assures containment integrity is maintained which in turn ensures that the release of radioactivity to the environment is limited after a loss of coolant accident (LOCA).
Containment i
isolation functions to isolate the containment atmosphere and process systems-that penetrate containment from the environment.
Containment isolation is necessary to limit the release of I
radioactivity to the environment in the event of a LOCA.
Steam Line Isolation provides protection in the event of a steam line break inside or outside of containment.
Rapid isolation of the steam lines will limit the steam line break accident to the blowdown from one SG.
This limits the positive reactivity effects of the RCS cooldown associated with the SG blowdown and limits the pressure rise within containment in the event the steam line break occurs within containment.
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~ ATTACHMENT B, continusd Licsnse Amandmsnt Rtqu2ct Nos. 271 and 147 Page 3 The proposed change affects the manual initiation of the functions discussed above.
The manual initiation of these functions provides a backup for the automatic operation of these functions.
The automatic operation of these functions is described in the UFSAR and assumed in the safety analyses.
The manual steam line isolation also functions as the primary means to isolate a SG in order to recover from a SG tube rupture.
C.
JUSTIFICATION The inclusion-of Footnote 1 to Table 4.3-2 to modify the monthly frequency is consistent with the ESFAS Instrumentation TS contained in NUREG-0452, " Standard Technical Specifications For Westinghouse Pressurized Water Reactors," dated March 15, 1975.
Later revisions of NUREG-0452 changed the ESFAS TS surveillance requirements for the manual initiation functions to simply specify a refueling frequency.
In addition, NUREG-1431, Improved Standard Technical Specifications For Westinghouse Plants Rev.
1, specifies an 18 month frequency for testing manual initiation functions.
Therefore, the more current standard ESFAS TS no longer contain an equivalent to Footnote 1 for Table 4.3-2.
The more recent' standard TS simply require manual initiation functions to be tested each refueling (18 months).
The later Standard TS more clearly recognize that the test of manual initiation circuitry actuates the end component and must be performed when the plant is in a condition where the potential for causing a plant transient does not exist.
The proposed change updates the BVPS TS frequency requirements for surveillance testing the manual initiation functions to be more consistent with the current standard TS for Westinghouse Plants.
The specification of a refueling based frequency for these surveillances is appropriate as online testing of the manual initiation functions would result in significant plant transients.
Therefore, testing the manual initiation functions can not be safely accomplished at power.
Unit 2 UFSAR Section 7.1.2.4,
" Requirements for Periodic Testing," contains explicit justification for not testing manual actuation instrumentation at power.
Unit 1 UFSAR Section
- 7. 3. 2.1. 5,
" Capability for Sensor Checks and Equipment Test and Calibration," also specifically excludes testing equipment at power that would cause a plant transient.
In addition, the requirement in Footnote 1 to perform a CFT at least once per 31 days on all other circuitry associated with manual safeguards actuation is not applicable to any manual initiation functions. listed on. Table 4.3-2.
The monthly testing requiroments specified on Table 4.3-2 and in Footnote 1 for each manual initiation function are not consistent with the 18 month requirement specified in Note 1 for manual actuation switches and introduce the potential for confusion regarding the applicable frequency for testing the manual initiation functions listed on Table 4.3-2.
As such, the proposed change clarifies the intent of the TS consistent with the UFSAR descriptions and with the frequency for testing manual initiation functions specified in B-3 1
ATTACHMENT B, continued Licanas Amsndmant Rsquest Nos. 271 and 147 Page 4 the current standard TS for Westinghouse plants.
By changing the required frequency for testing the manual initiation functions to
- a. refueling basis, Footnote 1 to Table 4.3-2 is no longer required and has been deleted.
The renumbering of Table 4.3-2 Footnote 2 to Footnote 1 and the deletion of the Unit 2 Footnote 3 are editorial in nature and serve to enhance the clarity and consistency of the TS requirements.
The proposed change addresses all the manual initiation functions specified on the Unit 1 and 2 ESFAS TS Table 4.3-2.
The revision of the frequency for all the manual initiation functions to a refueling basis and the resulting deletion of Footnote 1 to Table 4.3-2 eliminates the potential confusion introduced by the footnote and assures the manual initiation functions will be tested at the appropriate surveillance frequency.
The proposed additions and modifications made to the TS bases provide additional clarifications regarding the CFT in general and specifically the application of the CFT requirement to the manual initiation functions.
The proposed bases changes serve only as a clarification of the CFT requirement and do not result in a change in the method or frequency used to verify equipment operability.
D.
SAFETY ANALYSIS The proposed change to the surveillance frequency for the manual functions listed on Table 4.3-2 of TS 3/4.3.2, "ESFAS Instrumentation," will clarify the existing practice of testing the individual manual functions at each refueling.
The refueling based frequency for testing this instrumentation is consistent with the industry standard testing frequency specified in the standard Westinghouse TS.
Therefore, the refueling based test frequency is considered sufficient to ensure the manual initiation instrumentation is maintained operable.
The proposed change does not reduce the TS requirements for this instrumentation.
In addition, the proposed change does not affect the method or frequency of the testing currently performed on this instrumentation.
The proposed change provides a
clarification that makes the TS requirements more consistant with the licensing basis for testing manual initiation functions described in the UFSARs (U1 7.3.2.1.5 and U2 7.1.2.4) and with the manner in which this testing is specified in the Standard TS.
The proposed change also eliminates the application of a
potentially confusing footnote.
Footnote 2 to Table 4.3-2 is renumbered as a result of the deletion of Footnote 1, and Unit 2 Footnote 3 which was only applicable for the first refueling outage was deleted.
The reorganization of these footnotes and the changes made to the TS bases are editorial in nature and do i
not impact safety.
Operation of the plant with the proposed changes continues to ensure the manual initiation functions will be maintained in the same manner as before.
As such, the proposed change will ensure the manual functions continue to be capable of performing their design safety functions.
Therefore, B-4
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i ATTACHMENT D, continutd Licznno Am ndsent Rgqusot Noc. 271 and 147 Page 5 the proposed change does not reduce the reliability or availability of the affected equipment and does not impact any safety analysis.
Based on the above, the change is acceptable and will not adversely affect the safety of the plant.
E.
NO SIGNIFICANT HAZARDS EVALUATION The no significant hazard considerations involved with the proposed amendment have been evaluated.
The evaluation focusing on the three standards set forth in 10 CFR 50.92(c) are as quoted i
below:
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The Commission may make a final determination, pursuant to the procedures in paragraph 50.91, that a proposed amendment to an operating license for a
facility licensed under paragraph 50.21(b) or paragraph 50.22 or for a testing facility involves no significant hazards consideration, if operation of the facility in accordance with the proposed amendment would not:
(1)
Involve a significant increase in the probability or consequences of an accident previously evaluated; or (2)
Create the possibility of a new or different kind of accident from any accident previously evaluated; or (3)
Involve a significant reduction in a margin of safety.
The following evaluation is provided for the no significant hazards consideration standards.
1.
Does the change involve a
significant increase in the probability or consequences of an accident previously evaluated?
The proposed change revises the frequency notation specified for the channel functional test of the manual initiation functions listed on Table 4.3-2 of TS 3/4.3.2,
" Engineered Safety Feature Actuation System (ESFAS)
Instrumentation."
The proposed change revises the current TS requirement for surveillance testing these functions to clarify that testing be ~ performed on a refueling basis.
The revision to the surveillance frequency specified in Table 4.3-2 does not physically impact the Instrumentation, its setpoints, or the actual frequency at which the manual initiation functions are tested.
The revision eliminates the potential for confusion regarding the testing required for the manual initiation i
function by deleting Footnote (1) to Table 4.3-2.
The proposed change to the Surveillance Requirements of Table 4.3-2 for the manual initiation functions eliminates the need for Footnote (1).
Footnote (1) requires testing the manual actuation switches every 18 months and performing a channel Functional Test on all other circuitry associated with manual B-5
Il ATTACHMENT B, continusd Lic0nna Amsndmsnt Raquest Non. 271 and 147 Page 6 i
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safeguards actuation every 31 days.
As there is no other circuitry for which a 31 day CFT is applicable, the proposed change simplifies the TS requirement consistent with the current Standard TS for Westinghouse plants.
Footnote (1) is consistent with early versions of the Standard Technical Specifications of NUREG-0452; however, later versions of the Standard Technical Specifications and the Improved Standard Technical Specifications of NUREG-1431 simply require testing manual initiation functions on a refueling or 18 month basis.
The proposed refueling frequency for testing this instrumentation recognizes that the manual initiation functions can not be tested at power since this would introduce the potential for a significant plant transient.
The deletion-of Table 4.3-2 Footnote (1) resulted in renumbering Footnote (2) to (1).
In addition, expired Unit 2 Table 4.3-2 Footnote (3)
(only applicable to the first refueling outage) was also deleted.
In addition, changes to the 'TS bases are made to further clarify the channel functional test requirements.
The reorganization of the Table 4.3-2 footnotes and bases modifications are considered to be editorial changes.
The manual initiation instrumentation will continue to be tested in the same manner as before (every refueling)..This test frequency is consistent with the licensing basis for testing this instrumentation described in the Updated Final Safety Analysis Report (UFSAR) and with the testing frequency specified in the standard Westinghouse Plant TS.
Therefore, this test frequency is considered adequate to verify instrumentation operability.
In addition, failure of a manual initiation function is not an accident initiator.
As such, the ESFAS instrumentation will continue to be capable of providing the required safety functions described in the UFSAR.
Therefore, operation of the facility in accordance with the proposed amendment does not involve a significant increase in the probability or consequence of an accident previously evaluated.
2.
Does the change create the possibility of a new or different kind of accident from any accident previously evaluated?
There are no hardware changes associated with this license amendment nor are there any changes in the method by which any safety-related plant system performs its safety function.
No new accident scenarios, transient precursors, failure mechanisms or limiting single failures are introduced as a result of these changes.
These changes do not introduce any adverse effects or challenges to any safety-related systems.
No change is required to any system configurations, plant equipment or analyses.
Therefore, these changes will not create the possibility of any new or different kind of accident from any accident previously evaluated.
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ATTACHMENT B, continutd Licanzo Amsndm3nt R1quast Nos. 271 and 147 Page 7 3.
Does the change involve a significant reduction in a margin of safety?
The margin of safety depends on the maintenance of specific operating parameters and systems within design requirements.
Updating the manual initiation function surveillance interval requirements specified on ESFAS TS Table 4.3-2 and deleting Table 4.3-2 Footnote (1) reflects the standard Westinghouse Plant TS requirements for this instrumentation and is consistent with the design and operation of the plant as described in the UFSAR.
In addition, the proposed change does not reduce the current refueling interval testing performed on this instrumentation.
The refueling test frequency specified for this instrumentation is consistent with industry standards and considered adequate to ensure the affected manual initiation functions are maintained operable.
The proposed change will improve the clarity of the TS requirement by eliminating the potential for confusion as to when the surveillances are required to be performed.
As
- such, the proposed change continues to ensure that the operation of the affected instrumentation is maintained within its design requirements and that it continues to be capable of providing the required safety functions described in the UFSAR.
Therefore, ' operation of the facility in accordance with the proposed amendment will not involve a significant reduction in a margin of safety.
F.
NO SIGNIFICANT HAZARDS CONSIDERATION DETERMINATION Based on the considerations expressed above, it is concluded that the activities associated with this license amendment request satisfy the requirements of 10 CFR 50.92 (c) and, accordingly, a no significant hazards consideration finding is justified.
G.
ENVIRONMENTAL CONSIDERATION This license amendment request changes a requirement with respect to the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20.
It has been determined that this license amendment request involves no significant increase in the amounts, and no significant change in the types of any affluents that_may be released offsite, and that there is no significant increase in individual or cumulative occupational radiation exposure.
This license amendment request may change requirements with respect to installation or use of a facility component located within the restricted area or change an inspection or surveillance requirement; however, the category of this licensing action does not individually or cumulatively have a significant effect on the human environment.
Accordingly,
+
this license amendment request meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22 (c) (9).
Pursuant to 10 CFR 51.22(b) no environmental impact statement or B-7
ATTACHMENT B, continusd LicOn3s Am:ndmsnt Raqusst Nos. 271 and 147 Page 8
' environmental assessment need be prepared in connection with the issuance of this license amendment request.
H.
UFSAR CHANGES None identified.
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