ML17329A039
| ML17329A039 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 05/03/1991 |
| From: | Fitzpatrick E AMERICAN ELECTRIC POWER CO., INC., AMERICAN ELECTRIC POWER SERVICE CORP. |
| To: | Murley T Office of Nuclear Reactor Regulation |
| References | |
| IEIN-91-022, IEIN-91-22, NUDOCS 9106070303 | |
| Download: ML17329A039 (8) | |
Text
ACCELERATED DI UTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:9106070303 DOC.DATE: 91/05/03 NOTARIZED: NO DOCKET FACIL:50-315 Donald C.
Cook Nuclear Power Plant, Unit 1, Indiana 05000315 50-316 Donald C.
Cook Nuclear Power Plant, Unit 2, Indiana 05000316 AUTH.NAME AUTHOR AFFILIATION FITZPATRICK,E.
American Electric Power Co., Inc.
FITZPATRICK,E.
American Electric Power Service Corp.
R RECIP.NAME RECIPIENT AFFILIATION MURLEY,T.E.
Office of Nuclear Reactor Regulation, Director (Post 870411
SUBJECT:
Responds to ltr re importance of NRC Info Notice 91-22.
Highlights steps taken to ensure personnel maintian high level of awareness of potential for causes of shutdown risks described in notice.
DISTRIBUTION CODE:
AOOID COPIES RECEIVED:LTR 2 ENCL 2 SIZE:
TITLE: OR Submittal:
General Distribution NOTES:
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RECIPIENT ID CODE/NAME PD3-1 LA COLBURN,T.
INTERNAL: NRR/DET/ECMB 7D NRR/DOEA/OTSB11 NRR/DST/SELB 7E NRR/DST/SRXB 8E OC/LFMB 01 EXTERNAL NRC PDR COPIES LTTR ENCL 1
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RECIPIENT ID CODE/NAME PD3-1 PD NRR/DET/ESGB NRR/DST 8E2 NRR/DST/SICB8H7 NUDOCS-ABSTRACT OGC/HDS2 RES/DSIR/EIB NSIC COPIES LTTR ENCL 1
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D NOTE TO ALL"RIDS" RECIPIENTS:
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PLEASE HELP US TO REDUCE WASTEI CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISIS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
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> ~ Dr. T. E. Murley Page 2 May 3, 1991 In addition, the plant manager issued directives requiring plant manager approval of all non-routine activities within the switchyard and requiring that an additional power supply above those required by the technical specifications be maintained throughout the outage. During the outage, the roadway leading to the preferred off site power supply transformers was closed and the transformer area was cordoned off to limit access. Concrete barriers were installed to protect reserve transformers from inadvertent impact and a designated spotter was required during any crane movement in the transformer area. The outage management team periodically inspected the transformer arid diesel generator air intake areas for safety hazards, loose debris, and fire hazards. As an added precaution, prior to removing a diesel generator train from service for maintenance, the opposite train's diesel generator was run to verify its operability. This verification was in addition to any technical specification requirements. A Cook Nuclear Plant shutdown issues task force has been convened to examine issues affecting plant safety during shutdown. Areas such as reactivity control, decay heat removal, and reactor vessel protection are being examined to determine the adequacy of our current practices and to suggest improvements. The task force is represented by personnel from a variety of departments including operations, outage
- planning, maintenance, nuclear safety and licensing, and shift technical advisors.
In addition, the plant manager is a member of the NUMARC shutdown risk assessment team. We intend to continue the practices described above and to implement, through formal procedure, the recommendations resulting from the plant shutdown issues task force. The result of these controls is that the issues surrounding non-routine plant configurations remain in the foreground during plant outages. It is our intent to, and our belief that these measures will, prevent the types of events described in Information Notice 91-22 from occurring at Cook Nuclear Plant. If you require additional information regarding Cook Nuclear Plant practices, please contact me. Sincerely, rdh Attachment ~ ~ ~ p ~ I 'V D. C. COOK NUCLEAR PLANT CRITICAL PARAMETERS 4/25/91 REACTOR COOLANT SYSTEM INVENTORY EMERGENCY DIESEL GENERATORS BORATION FLOW PATH ESW PUMPS UNACCEPTABLE REGION CHARGING PUMPS PUMPS ','+'+'+' POWER SOURCES'HR PUMPS Parameter Acce table Ran e RCS Inventory (621-614 ft) Bora tion Flow Paths Avail ( l -2) Charging Pumps Avail (1-2) Off Site Power Sources (1-2) RHR Pumps Operable (1-2) CCW Pumps Operable (1-2) ESW Pumps Operable (1-2) Diesel Generators Operable (1-2) No. >621 ft 2 1 2 2 2 1 2 Comments PZR >17% level WEST Pump Out of S'ervice EAST Pump Out of Service STATUS OF CHANGES: West CCP has been Removed from Service to Leak Test CS-299W t ~ e ~ 0 ~ ~ ~ 0