ML20045H735
| ML20045H735 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 07/14/1993 |
| From: | Newton R WESTINGHOUSE OPERATING PLANTS OWNERS GROUP |
| To: | Thadani A NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| References | |
| GL-93-04, GL-93-4, OG-93-44, NUDOCS 9307210195 | |
| Download: ML20045H735 (4) | |
Text
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'o = css pe-ar OG-93-44 July 14.1993 Mr. Ashok C. Thadani Director Division of Systems Technology Office of Nuclear Reactor Research U.S. Nuclear Regulatory Commission Washington, DC 20555 Subject Westinghouse Om Group Recuest for Sch; Q 7eliefin Responding to GL 93-04 "Ro.,
..; };j. System Failure and Withdrawal of Rod ( e 4 >l Cluster Assemblies"
Reference:
NRC Genene Letter 93-04, " Rod Control System Failure and Withdrawal of Rod Conuel duster Assemblies,10 CFR 50.54(t)," issued June 21,1993, r
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Dear Mr. Thadani:
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Pursuant to the requirements of 10 CFR 50.54 (f), the NRC issued Genenc Leuer 93-04,
- Rod Control SO System Failure and Withdrawal of Rod Control Guster Assemblics." on Monday, June 21,1993 and So was addressed to all licensees with the Westinghouse Rod Control System (except Haddam Neck) for
,ction and to all other licensees for information.
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-om The generic letter requires that, within 45 days from the date of the generic letter, each addressee 7
provide an assessment of whether or not the licensing basis for each facility is still sausfied with Sa.
regard to the requirements for system response to a single failure in th, I,M Control Nn CDC 25 ph or equivalent). If the naa**=mant indicates that the licensmg basis is m. uisfied, thy *y " easse must describe cxxnpensatory short-term actions consissent with the guideliacs containe: U mr 1enerse letter, and within 90 days, provide a plan and schedale for long-term resolution.
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PAGE.003 JULY 9 MEETING
SUMMARY
On Friday, July 9,1993, representatives from the Westinghouse Owners Group (WOG) and Westinghouse Electne met with the NRC in Rockville, Md to discuss the status of activities initiated by the WOG. The focus of the mecung was to present the 'WOG strategy to resolve this issue followed by a summary and schedule of on-going efforts. The WOG has developed a dual approach in resolving the rod control issue. The first path involves system testing,4cngfailure analysis, and an equipment survey to better understand the Salem event and determine if a singic failure was truly responsible. The second path will utilize new generic safety analyses to verify the safety significance of the issue and determine available DNBR margins.
The current WOG schedule was presented at the meeting which has the final reports for the equipment failure survey, generic accident analysis, failure assessment, and generic guidance all being due from Westingbouse by July 30. This leaves 3 working days for licensees to review the WOG material and develop their licensee-specific 45 day response. In addition, the rod control system testing program will not be completed unul August 25 and the summary report of the test program issued by September 24. Here was general agreement during the meeting that, at the 45 day response date, utilities would not have enough informanon to make a 50.54(f) statement as required by NRC GL 934%.
Finally, the WOG does agree with the NRC in that the safety significance of this issue is not high as discussed in NRC GL 934%, but a careful assessment of the Rod Control System is needed to resolve the Salem event.
REQUEST FOR SCHEDULAR RELIEF Based on the results of the July 9 meeting, the WOG is making the following request for schedular relief with respect to the requirements of GL 93 04. The WOG is requesting that the 45 day licensing basis assessment described as Required Response 1.(a) be extended to 90 days. This request was informally diens-i at the July 9 meeting. The request is ticing made to preciude a decision based on prelimmary or incomplete information available at the end of the 45 day penod. The pograms presented by the WOG will either have just been completed or will still be in progress at the end of 45 days. Given the aggressive whedule developed by the WOG, there will not be sufficient time available to permit individual licensees to integrate the new/ completed information into their response.
It is understood that aillicensees abould still provide a response to the secosd section of Required Response L(b) describing any compensatory short-term actions taken or that will be taken to address any actual or potential degraded or nonconforming conditions such as 1) additional cautions or modifications to surveillance and preventative maintenance procedures, 2) additional administrative controls for plant startup and power operation, and 3) additional instructions and training to heighten operator awareness of potential rod control system failures and to guide operator response in the event of a rod control system malfunction.
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FUIURE ACITVITIES The WOG Steering Comminee will be issuing a letter, by Friday, July 16, to all WOG members that wdl include both a summary of the July 9 meeting and the WOG strategy for the 45 day licensee response. In addition, at the end of July, the Stecrmg Committee will provide reed:ff 66cded guidance for licensee response and the results from the generic safety analysis program to each WOG member for use in the 45 day response.
Before the required date for the 90 day response, the WOG will provide the results of both programs to member utilities to permit the licensees to make their plant-specific deterrmnation as to whether or not the licensing basis is satisfied with regard to the requirements for system response to a single failure in the md control system. Any long-term activities or recommendations will also be provided at that time.
SUMMARY
In consideration of schedular constraints, the WOG is requesting relief from the 45 day requirement for the licensing basis memnent as desenbcd as Required Response 1.(a) of NRC GL 93-04 and that this assessment be part of the 90 day response. ne WOG will continue to support a response at 45 days from each licensee detailing any short-term actions implemented in respor.se to the Rod Control System failure event at Salem and the results from the generic safety analysis program. The WOG will also support a request for a follow.up meeting with the NRC in August / September once progrra results are obtained.
Should you have any questions regarding this letter, please mutact me at (414) 2212002.
Very truiy yours.
R er A. Newton. Chairman Regulatory Response Group Westinghouse Owners Group Westinghause Owners G:uup Primary Represen:atives cc:
Steering Committee Regulatory Response Group William T. Russell, NRC James G. Partlow, NRC C.K. McCoy, Georgia Power J.P. O'Hanlon. Virginia Power NJ. Upirulo, W KJ. Voytell, W 9
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