ML20148K982
| ML20148K982 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 03/18/1988 |
| From: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Lieberman J, Murley T, Taylor J NRC OFFICE OF ENFORCEMENT (OE), Office of Nuclear Reactor Regulation, NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
| References | |
| NUDOCS 8804010088 | |
| Download: ML20148K982 (2) | |
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MAR 181988 i
MEMORANDUM FOR: Thomas E. Murley, Director, Office of Nuclear Reactor.
Regulation James M. Taylor, Deputy Executive Director for Regional i
Operations James Lieberman, Director, Office of Enforcement 1
FROM:
J. Nelson Grace, Regional Administrator
SUBJECT:
ENFORCEMENT DISCRETION FOR CATAWBA NUCLEAR STATION, UNIT 2, DOCKET N0. 50-414 The purpose of this memorandum is to document that on February 25, 1988, Duke Power Company (DPC) was verbally granted a one-time 12-hour relief from compliance with the Technical Specification (TS) Limiting Condition for Operation (LCO) Action Statement 3.7.1.2(a), Auxiliary Feedwater System.
The l
LCO action statement requires with one auxiliary feudwater pump inoperaule restoration of the required auxiliary feedwater pump to operable status within i
72-hours or be in at least Hot Standby within the next 6-hours and in Hot Shutdown within the following 6-hours.
The unit was in Hot Standby at the time of this request.
The TS relief allowed DPC to delay the requirement to be in Hot Shutdown by 12-hours.
This relief was granted by Region 11 per the February 27, 1987, memorandum to Regional Administrators from Harold R. Denton 4
j and James M. Taylor regarding relief from Technical Specification LCOs.
As described in Enclosure 1, the 12-hour extension was granted for the purpose i
of avoiding an unnecessary thermal transient of the plant while giving DPC l
sufficient time to repair the turbine driven auxiliary feedwater pump governor t
and servo mechanism under hot conditions.
Further testing of the pump revealed additional probleras and it was determined by DPC that necessary repairs and i
i testing would not be completed within the extended LC0 period.
The unit was taken to Hot Shutdown after using 11-hours and 32-minutes of the relief.
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Prior to relief being granted, the technical issues and extent of enforcement discretion were discussed with J. N. Grace, V. L. Brownlee and K. VanDoorn of Region II; D. Hood of NRR; and, N. Rutherford, J. Hampton and L. Hartzell of i
DPC.
r OR)G1W. 0:EED SY8 J. nu. SON GRACE J. Nelson Grace i
Enclosures:
1.
DPC to NRC letter dated February 29, 1988 2.
NRC to DPC letter dated l
l March 14, 1988 cc w/encis:
(See page 2)
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MAR 10 IW8 cc w/encis:
G. C. Lainas, NRR K. Jabbour, NRR W. Troskoski, E00 J. Sniezek, NRR bec w/encis:
L. A. Reyes A. F. Gibson G. R. Jenkins V. L. Brownlee T. A. Peebles B. R. Bonser NRC Resident Inspector Document Control Desk State of South Carolina J
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ENCLOSURE 1 Den Pown GoMmNY en saa==
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February 29, 1984 t',8. Nuclear Estulatory Commission Document Control Desk Washigton, D. O, 20555 Subjects Catawba Duclear Ste': ion, Unit 2 Docket No. 50-414 Discretionary Enforcement Relief from
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Technical Specification 3.7.1.2 Gentlement his letter constitutes written follmmsp of a regneet for temporary waiver of Technical Specificatics requirements which was made (sod enbsequently granted) via i
o teleton between tuka Power company personnat atti seabers of your staff on Febrw-sry 25. 1988. This torporary esorgency relief free compliance with the Technical specification Limiting conditions for Operation (L%) Action Statement was request-cd to avoid unnecessarily forcing Catewba Unit 2 to Mode 4 (30T SEUTDovW) sisse the LCO Action Statement vovid have espired at 0$15 hours en February 26, 1988
be proposed reliaf request was the reesit of the Auxiliary Feedwater System Tur,-
bine Driven Pump (CAPT) inoperability due to turbias speed sentrol problems. He CAFT was declared inoperabia at 0515 heers en February 23, 1988 and Mode 5 (30T 4
STANDBY) had been entered at 2359 hours0.0273 days <br />0.655 hours <br />0.0039 weeks <br />8.975995e-4 months <br /> sa February 21, 1938 Continued inoped 1
ability of the CAPT withoet Discretion.ory Infoteenest would have required the sait te cater Mode 4 (EDI SEUTDOWN) by 1115 heats os Yebruary 26, 1984 tuks Power Company psteoamel. repaired the turbias governor and serve mechanise in cedar to resolve the turbine spaed sentt%1 problem.
Further teattag revealed cdiitional problems and it was determined that necessary repairs and testing would not 'ee convissed withis the estended LCO period.
The decision was made to cool-dnra to Mode 4 and cont 1 BET repairs to the tu rbine.
Mode 4 was entered at 2247 hours0.026 days <br />0.624 hours <br />0.00372 weeks <br />8.549835e-4 months <br /> on February 26, 1988.
no function of the CA system is to prdride feedvster to the 5/G's in the event that the Condensate /Feedveter System is lo s t.
This water ' ensure s a decay haat removal path to cool the Rasetor Coolant Systen unti) such t!as that the Rasidual Esat Rauwal System may be operated.
he CA motor-drium punte Yanained operable throuth< ut this event.
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Doennent Conhol Desk February 29, 1984 Fage 2 A Safety Realuatin (attached) was completed in accordance with 10CFR 50.59. Tkte Safety Evaluation concluded that no unreviswed safety question arists and that granting this request posed no undue risk to the health and safety of the public.
Yory truly your6, YM Bal 3. Tucker
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RWo/36/jgo Attachment Oct Dr. J. Welson Orace, 3431onal Administrator U.S. Aclear Regulatory commission Region II 101 Marietta St., WW. Suite 2900 Atlanta, Georgia 30323 Mr. F.E. Van Doers MRC Sesident Inspecter Catawba helaar $tation 9
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NUCLEAR SAFETT ITAt4!.YICII CEtcILIST ne extension of the turbina drives auxiliary feedveter pump inoperability time in Mode 3 by 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> does not create the cosetbility of an uccident 4
which is outside the parameters previously evaluated in the F8Ak.
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The piset status at the time the inoterability period astena1on would taka effet,t ta as follows:
- The reactor has been in a refueling outage for the past 64 days and there-Gro thermal res.ctor power id at a reduMd level.
- The present major heat source in the Rasctor Coolant Systes is the heat addition o' the Reactor Ccolant Pumps.
The heat energy added by theos pumps is not adequate for extended operation of the Turbine Driven Anzil-isry Feedvater Pus.p.
There fore, the Turbine Driven Auxiliary Feedvetor Pump would not presently be a viable option for plant cooldown given the present plant tesdition.
- Both motor driven auxiliary feed pumps are operable and their sesociated emergency dieaal asseratore are operable.
- All required haergency Core Cooling Systems are operable.
Durir.3 the vorat case accident eval'uted is the y8A1 a main feedvater line break, with. the above initial conditiona the lacperability of the turbine driven auxiliary feedwater pump will not prevent tsking the reactor to Mode 4 and initiatina ths 14eidual test Removal System.
The rasetor could be taken to Mode 4 using one or both of the following
-a' s noter driven auxiliary feedwatse pumps.
- The use of the pressuriser PORYs and available steam generater inventory to reduce reacter pressee to allev the initiaties of feed and bleed procadur9e using the safety injection pumps.
Basad upon the plant condition and the availat111ty of other plant equipeest as discussed above, it has been determined that the extenstem of the turbine driven ausiliary feedvater pump inoperability time in Mode 3 by 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> did not create an unreviewed safety question.
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ENCLOSURE 2
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UNIT EJ STATES o
NUCLEAn REGULATOP.Y COMMIS$10M y
CEllON il y
j 101 MARIETTA STREET, N.W.
t ATL ANTA, GEORol A 3o323
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MAR 14 bed Cocket No. 50-414 License N?. NPF-52 Duke Power Company ATTN: Mr. H. B. Tucker, Vice President Nuclear Production Department 422 South Church Street Charlotte, NC 28242 Gentlemen:
SUBJECT:
ENFORCEMENT DISCRETION FOR CATAWBA NL' CLEAR STATION, UNIT 2, DOCKET NO. 50-414 This letter acknowledges your letter of February 29, 1988, requesting relief from the Action Statement of Technical Specifier.in 3.7.1.2 (a) Auxiliary Feedwater System.
In your telephor.e conversations with Region 11 staff on February 25, 1988 you were informed that discretionary enforcement action would be granted to extend the referenced action statement by 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
Should you have any questions regarding this letter, please contact us.
Sincerely,
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/ J. Nelson Grace
+' Regional tdministrator cc:
T. B. Owen, Station Manager i
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