ML20141C173

Forwards for Review & Comment,Preliminary Accident Sequence Precursor Analysis of Operational Event Which Occurred at Plant on 960901 Re LER 213/96-024.W/o Encl

ML20141C173
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	06/20/1997
From:	Fairtile M NRC (Affiliation Not Assigned)
To:	Feigenbaum T, Mellor R CONNECTICUT YANKEE ATOMIC POWER CO.
References
NUDOCS 9706250029
Download: ML20141C173 (4)

Text

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i / i UNITED STATES  :

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NUCLEAR REGULATORY COMMISSION *

[ WASHINGTON, D.C. 2056 5 0001 l .g l June 20, 1997 l

, Mr. Ted C. Feigenbaum Executive Vice President c/o Mr. Russell Mellor Director of Site Operations Connecticut Yankee Atomic Power Co.

362 Injun Hollow Road East Hampton, CT 06424-3099

SUBJECT:

REVIEW 0F PRELIMINARY ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF OPERATIONAL EVENT AT THE HADDAM NECK PLANT

Dear Mr. Feigenbaum:

Enclosed for your review and comment is a copy of the preliminary Accident Sequence Precursor (ASP) analysis of an operational event which occurred at the Haddam Neck Plant on September 1,1996 (Enclosure 1),- and was reported in Licensee Event Report (LER) No. 213/96-024. This analysis was prepared by our contractor at the Oak Ridge National Laboratory (ORNL). The results of this preliminary analysis indicate that this event may be a precursor for 1996. In assessing operational events, an effort was made to make the ASP models as realistic as possible regarding the specific features' and response of a given plant to various accident sequence initiators. We realize that licensees may have additional systems and emergency procedures, or other features at their plants that might affect the analysis. Therefore, we are providing you an opportunity to review and comment on the technical adequacy of the preliminary ASP analysis, including the depicticn of plant equipment and equipment capabilities. Upon receipt and evaluation of your comments, we will revise the conditional core damage probability calculations where necessary to consider the specific information you have provided. The object of the review process is to provide as realistic an analysis of the significance of the event as possible.

In order for us to incorporate your comments, perform any required reanalysis, /

and prepare the final report of our analysis of this event in a timely manner, O you are requested to complete your review and to provide any comments within 30 days of receipt of this let4.er. We have streamlined the ASP Program with the objective of significantly improving the time after an event in which the .

final precursor analysis of the event ir made publicly available. As soon as our final analysis of the event has been completed, we will provide for your information the final precursor analysis of the event and the resolution of your comments. In previous years, licensees have had to wait until publication of the Annual Precursor Report (in some cases, up to 23 months after an event) for the final precurser analysis of an event and the resolution of their comments.

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i Mr. Ted C. Feigenbaum June 20, 1997 We have also enclosed several items to facilitate your review. Enclosure 2 contains specific guidance for performing the requested review, identifies the criteria which we will apply to determine whether any credit should be given in the analysis for the use of licensee-identified additional equipment or specific actions in recovering from the event, and describes the specific l

information that you should provide to support such a claim. Enclosure 3 is a copy of LER No. 213/96-024, which documented the event.

Please contact me at (301) 415-1442 if you have any questions regarding this request. This request is covered by the existing OMB clearance number (3150-0104) for NRC staff followup review of events documented in LERs. Your response to this request is voluntary and does not constitute a licensing requirement.

Sincerely, Original signed by:

Morton B. Fairtile, Senior Project Manager Non-Power Reactors and Decommissioning i Project Directorate '

Division of Reactor Program Management Office of Nuclear Reactor Regulation l

l Docket No. 50-213

Enclosures:

As stated cc w/ enclosures: See next page l DISTRIBUTION: w/o enclosures Docket File 50-213' SWeiss 0GC (015-B-18)

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Mr. T<.ed C. Feigenbaum  !

l We have also enclosed several items to facilitate your review. Enclosure 2 contains specific guidance for performing the requested review, identifies the

,' criteria which we will apply to determine whether any credit should be given in the analysis for the use of licensee-identified additional equipment or 1 specific actions in recovering from the event, and describes the specific information that you should provide to support such a claim. Enclosure 3 is a 1

copy of LER No. 213/96-024, which documented the event. l l i i  !

l Please contact me at (301) 415-1442 if you have any questions regarding this j

request. This request is covered by the existing OMB clearance number l (3150-0104) for NRC staff followup review of events documented in LERs. Your i response to this request is voluntary and does not constitute a licensing l requirement.

! Sincerely,

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Morton B. Fairtile, Senior Project Manager l' Non-Power Reactors and Decommissioning  ;

Project Directorate Division of Reactor Program Management a Office of Nuclear Reactor Regulation 1

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i Docket No. 50-213 1

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Enclosures:

As stated i

I cc w/ enclosures:

j See next page i

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Northeast Utilities Service Corapany Haddam Neck Plant Docket No. 50-213 cc:

Lillian M. Cuoco, Esq. Resident Inspector Senior Nuclear Counsel Haddam Neck Plant Northeast Utilities Service Company c/o U.S. Nuclear Regulatory Commission P. O. Box 270 361 Injun Hollow Road Hartford, CT 06141-0270 East Hampton, CT 06424-3099 Mr. Kevin T. A. McCarthy, Director Mr. James S. Robinson Monitoring and Radiation Division. Manager, Nuclear Investments and Department of Environmental Administration Protection New England Power Company 79 Elm Street 25 Research Drive Hartford, CT 06106-5127 Westborough, MA 01582 Mr. Allan Johanson Mr. G. P. van Noordennen Assistant Director Manager - Nuclear Licensing Office of Policy and Management Northeast Utilities Service Company Policy Development and Planning 362 Injun Hollow Road Division East Hampton, CT 06424-3099 450 Capitol Avenue-MS#52ENR F.'O. Box 341441 Ms. Deborah B. Katz, President Hartford, CT 06134-1441 Citizens Awareness Network P. O. Box 83 Mr. F. C. Rothen Shelburne Falls, MA 01370-0083 Vice President - Work Services Northeast Utilities Service Company P. O. Box 128 Waterford, CT .06385 Mr. D. M. Goeb91 Vice President - Nuclear Oversight Northeast Utilities Service Company P. O. Box 128 Waterford, CT 06385 Mr. J. K. Thayer Recovery Officer, Nuclear Engineering and Support Northeast Utilities Service Company P. O. Box 128 Waterford, CT 06385 Regional Administrator Region I U.S. Nuclear Regulatory Commission 475 Allendale Road  !

King of Prussia, PA 19406  ;

i Board of Selectmen  :

Town Office Building l Haddam, CT 06438 l

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