ML20004D191
| ML20004D191 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/03/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Counsil W NORTHEAST NUCLEAR ENERGY CO. |
| Shared Package | |
| ML20004D192 | List: |
| References | |
| LSO5-81-06-004, LSO5-81-6-4, NUDOCS 8106080560 | |
| Download: ML20004D191 (3) | |
Text
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$n at UNITED STATES og NUCLEAR REGULATORY COMMISSION 3
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June 3, 1981 Docket *M. E0-245 LS05-81-06-004 a
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Mr. W. G. Counsil. Vice President 6-Nuclear Engineering and Operations 4 IO8/h. M
- 'A gA % J h Northeast Nuclear Energy Company Post Office Box 270 Hartford, Connecticut 06101 9
Dear Mr. Counsil:
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SUBJECT:
ISOLATION CONDE?tSER SUPPLY LINE WATER HAMMER INCIDENT (MILLSTONE STATION UNIT 1)
References:
1.
B. H. Grier ltr. to Northeast Muclear Energy Company, dtd. January 14, 1980.
2.
W. G. Counsil lte to B. H. Grier, dtd March 31, 1980.
3.
W. G. Counsil ltr to B. H. Grier, dtd May 8,19G0.
4 W. G. Counsil ltr to B. H. Grier, dtd July 31,19f>0.
5.
W. G. Counsil ltr to B. H. Grier, dtd October 31, 1980.
6.
W. G. Counsil ltr to B. H. Grier, dtd February 26, 1981.
Reference 1 required you to provide infomation regarding water hammer events which occurred on December 19, 1979 in the isolation condenser supply line. The information requested included a Jamage assessment and a description of the repairs and applicable stress analyses for this system.
Your responses to Reference 1 are contained j,n References 2 through 6.
The enclosed Safety Evaluation documer.ts our review of your responses on water hammer loads in the isolation condenser supply line for Millstone Nuclear Power Station, Unit 1.
The results of our review indicate that two design areas do not comply with I&E Bulletin 79-02 which require a factor of safety of at least 4 for e.ypansion anchor bolts under all design conditions.
We note that 1
you have used a factor of safety of 2 for expansion anchor bolts in the redesign of containment penetration anchor X-10A and a loading combina-tion of Normal Operating Loads (N) + High Energy Pipe Breaks (HEPB) instead of N + HEPB + DBE as required by I&E Bulletin 79-02.
P00R ORIBlML 8106080 N
1 June 3,1981 l
We request that you reassess your February 26, 1981 submittal and respond within 15 days to our concerns relating to adequacy of anchor bolt safety factors.
Sin erely,
' fM s
Dennis M. Crutchfield, Chi f Operating Reactors Branch #5 Division of Licensing
Enclosure:
Safety Evaluation cc w/ enclosure:
See next page 1
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Mr. W. G. Counsil June 3, 1981 cc William H. Cuddy, Esquire Connecticut Energy Agency Day, Berry & Howard ATTN: Assistant Director Counselors at Law Research and Policy One Constitution. Plaza Development Hartford, Connecticut 06103 Department of Planning and Energy Policy Board of Selectmen 20 Grand Street Town Hall Hartford, Connecticut 06106 Haddam, Connecticut 06103 Director, Criteria and Standards Division Northeast Nuclear Energy Company Office of Radiation Programs ATTN: Superintendent (ANR-460)
Millstone Plant U. S. Environmental Protection P. O. Box 128 Agency Waterford, Connecticut 06335 Washington, D. C.
20460 Mr. Janes R. Himmelwright U. S. Environmental Protection Northeast Utilities Service Conpany Agency P. O. Box 270 Region I Office Hartford, Connecticut 06101 ATTN: EIS COORDINATOR JFK Federal Building Resident Inspector Boston, Massachusetts 02203 c/o U. S. NRC P. O. Box Drawer KK Superintendent Niantic, Connecticut 06357 Haddam Neck Plant RFD #1 Waterford Public Library Post Office Box 127E Rope Ferry Road, Route 156 East Hanpton, Connecticut 06424 Waterford, Connecticut 06385 Resident Inspector First Selectman of the Tjv:
Haddam Neck Nuclear Power Station of Waterford c/o U. S. NRC Hall of Records East Haddam Post Office 200 Boston Post Road East Haddam, Connecticut 06423 Waterford, Connecticut 06385 John F. Opeka Systens Superintendent Northeast Utilities Service Conpany P. O. Box 270 Hartford, Connecticut 06101 Natural Resources Defense Council 91715th Street, N. W.
Washington, D. C.
20005 l
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