ML17331A797
| ML17331A797 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 08/28/1981 |
| From: | Hunter R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| AEP:NRC:00486A, AEP:NRC:486A, GL-81-14, NUDOCS 8109110262 | |
| Download: ML17331A797 (6) | |
Text
REGULATORY lvFORMATION OISTRIOJTION SY TE I (RIOS)
ACCESSIOV VoR:8109 110262 OOC ~ DATE; 91/08/28 VQTAP IZED: YFS '30 "KET FACI':50 315 Oona ld . Coo< Nuclear Power P>antq Unit ip Indiana 05 5 50-316 '3ona la ". CooN Nuclear Power Plant~ Unit 2i Indiana 0031 AUTH.NAWE AUT93% A}.F1LIATION HUNTERsR ~ ST Indiana R Macniaan Electric Co.
I REC P ~ VA IE RE: I oIE>>'I I AFF IL I ATIOV OEVTOVe 9 ~ Ro Office of nuclear Reactor Regulationi Director SUBJ=CT: Forwards respo nse to 810210 Generic Ltr 81 14 r e seismic qualification of constructed earthquake, 9ISTR I 8 J l I'JN C3OE: A001 S TITL=: general VOTES: I CE: 3 8
coo i es a l ~aterial.
1 auxiliary COP t ES feedwater
~aintaineo to witnstand safe shutdown RECEIVED l LTR 9istribu tion for after issuance l ),
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INDIANA L MICHIGAN ELECTRIC COMPANY P ~ O. BOX 18 BOWLIN G GR E EN STATION NEW YORK, H. Y. 10004 August 28, 1981 AEP:NRC:00486A DONALD C. COOK NUCLEAR PLAiVT UNIT NOS. 1 AND 2 DOCKET iVOS. 50-315 and 50-316 LICENSE NOS. DPR-58 and DPR-74 '.> l "W SEIS<ifIC QUALIFICATION OF AUXILIARY FEEDWATER SYSTEMS:
%/ aN Generic Letter 81-14 Hr, Harold R. Denton, Director tw v Office of uclear Reactor Regulation Vi U. S. Nuclear Regulatory Commission u<i< wcQN .~cc45 ANMC'h Washington, D. C. 20555
Dear Nr. Denton:
This letter and its attachment provide our response to ~ifr. D. G.
Eisenhut's Generic Letter o. 81-14 dated February 10, 1981 which we Vi offic'ally received .on June 18, 1981.,-
The Cook Plant Auxiliary Feedwater Systems (AFS), with the exception of the Condensate Storage Tanks (CSTs) and its associated piping, are designed; constructed, and maintained to withstand a Safe
.Shutdown Earthquake (SSE) as determined utilizing the analytical, testing and evaluation methods, and the acceptance criteria consist-ent with other safety-grade systems of the plant.
The components and equipment listed in the Attachment to this letter have been seismically qualified either by testing or analysis.
When qualified by analysis the seismic input is either a specified acceleration, or a response spectrum that bounds the most severe response spectrum for the plant, or the Design Basis Earthquake (DBE) response spectrum for the floor elevati.on where the respective component or equipment is installed. For those components qualified by analysis, the load combinations include the stresses due to the DBE, dead weight and, for pressure retaining parts, the operating pressure. These resulting stresses were then compared to the allowable stresses from the appropriate codes. For equipment quali-fied by testing, acceptance is determined by the operability of the equipment subsequent to the test.
Certain safety related switchgear cabinets and motor control centers were found to have insufficient anchorage to prevent over-turning during the DBE. As detailed in American Electric Power Service Corporation's August 14, 1981 and August 17, 1981 letters to you, temporary bracing was installed. The permanent modification of 81091102b2 810828 PDR ADOCK 05000315 P PDR
the anchorage has now been completed. As indicated in our August 17, 1981 letter, some of the equipment anchorage which was modified is beyond the scope of Generic Letter 81-14.
Seismic related IE Bulletins 79-02, 79-04, 79-07, 79-14, and 80-11, and IE Information Notice 80-21 have been reviewed for applic-ability to the AFS. All are applicable to the Cook Plant AFS except for IE Bulletin 79-04. All work applicable to the AFS for IE Bulletins 79-02 and 79-07 is complete; work applicable to the AFS for IE Bulletin 79-14 and 80-11 is presently being completed; Notice 80-21 is currently under review. IE'nformation Concerning the CST's, they are seismic class II, and are designed to withstand the Operating Basis Earthquake (OBE). In the unlikely event of a DBE which may result in damage to the CST's, procedures exist and are in place at the Cook Pla'nt to s~itch AFS pump suction to the essential service water (ESW) system, which is Seismic Class I. This procedure was described in detail in our
'letter to you dated March 28, 1980, No. AEP:NRC:0307A. The Safety Evaluation Report attached to MR, S. Varga's letter of October 6, 1980 accepted that procedure for switching to the ESW System.
Therefore, it is not necessary to walk down the CST's. Nevertheless, the non-seismically qualified piping connected to the CST's has been walked-down and no deficiencies were identified.
Very truly yours, R. S. Hunter Vice President cc: John E. Dolan Columbus R. C. Callen G. Charnoff R. W. Jurgensen D. V. Shaller - Bridgman Joe Williams, Jr.
NRC Region III Resident Inspector Bridgman
STATE OF NEW YORK )
)
COUNTY OF NEW YORK -)
R. S. Hunter being duly sworn, deposes and says that he is the Vice President of Licensee Indiana 6 Michigan Electric Company, that he has read the foregoing response to Generic Letter 81-14 and knows the contents thereof; and that said contents are true to the best of his knowledge and belief.
Subscribed snd sworn to before me this ~ dey of 1981.
otary Public Go QQ'p l. Q'Jr7 rI l hol ry Pu'bl c 'r e or 2 e r (ork tlo. 31- '643431 r!uaiified io llevr Yo'k County ><
19.~~
Cammissica Spires March 30,
ATTACHMENT SEISMICALLY QUALIFIED AUXILIARY FEEDWATER SYSTEM COMPONENTS METHOD OF QUALIFICATION COMPONENT (A=ANALYSIS;T=TEST)
Motor Driven Auxiliary Feedwater Pumps Turbine Driven Auxiliary A Feedwater Pumps Strainers A Instrumentation Instrument Tubing and Supports Valves and Valve A/T Supports Piping Pipe Hangers Conduits A Cable Troughs Terminal Blocks IA Motor Control Centers A/T DC Valve Control Centers "N" Train Battery Charger "N" Train Battery and Racks Switchgear Switches Relays Contactors
METHOD OF QUALIFICATION COMPONENT (A=ANALYSIS'T=TEST)
Auxiliary Feedwater Pump A Motors 4 KV Air Circuit Breakers DC Distribution Cabinet (Train N)
Auxiliary Feedwater Pump A Enclosures