ML20059H493
| ML20059H493 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 01/24/1994 |
| From: | Vissing G Office of Nuclear Reactor Regulation |
| To: | Opeka J CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO. |
| Shared Package | |
| ML20059H498 | List: |
| References | |
| IEB-80-04, IEB-80-4, TAC-M85504, NUDOCS 9401280078 | |
| Download: ML20059H493 (3) | |
Text
c 3anuary 24, 1994 Docket No. 50-336 DISTRIBUTION:
Docket file WLong NRC & Local PDRs SBrewer Mr. John F. Opeka PDI-4 Plant ADummer Executive Vice President, Nuclear SVarga RBarrett Connecticut Yankee Atomic Power Company JCalvo RJones Northeast Nuclear Energy Company SNorris CMcCraken Post Office Box 270 GVissing RLobel Hartford, Connecticut 06141-0270 OGC MCaruso ACRS (10)
GHubbard
Dear Mr. Opeka:
JRogge, RGI
SUBJECT:
MILLSTONE NUCLEAR POWER STATION, UNIT NO. 2, REVISED RESPONSE TO IE BULLETIN 80-04, MAIN STEAM LINE BREAK (MSLB) REANALYSIS (TAC NO. M85504)
We have reviewed your letter dated January 13, 1993, concerning the reanalysis of MSLB and revised response to IE Bulletin 80-04. This reanalysis was implemented as a result of your discovery of errors in the original 1979 MSLB analysis and the finding that the containment response due to a MSLB and continued feedwater addition would result in the allowable pressure and temperature of the containment being exceeded.
You have implemented corrective plant modifications to preclude this unacceptable containment response and, with your January 13, 1993, submittal, provided a reanalysis of the MSLB.
The updated response indicates that:
(1) acceptable methodology has been used for the revised MSLB analysis and that the results of the analysis indicate that plant systems, structures and components in containment will not be exposed to unacceptable pressure or temperature conditions resulting from a design basis MSLB, and (2) the core response to the reanalyzed MSLB is no more severe than shown by previous analysis and is also accept able.
Enclosed is a Supplemental Safety Evaluation addressing the containment and fuel responses to a MSLB.
Sincerely, Original signed by
$4g 2 g g g g 36 Guy S. Vissing, Senior Project Manager G
PDR Project Directorate I-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
Supplemental Safety Evaluation cc w/ enclosure:
$0 '3 See Next Page
- SEE PREVIOUS CONCURRENCE OFFICE: LA:PDI-4*
I PM:PDI-4*
D:PDI-4*
p NAME:
SN,orpi,s u,d.ng:bp MBoyle: Acting av-DATE:
1/13/94 1/13/94 1/19/94 M#
p' l
0FFICIAL RECORD COPY h h,na 61$q pd dq qqb t. N am q e
Bu ad DOCUMENT NAME:
G:\\VISSING\\M85504.SER b
/ "' % g f.-
ft UNITED STATES
[
j NUCLEAR REGULATORY COMMISSION W
't WASHINGTON, D.C. 20666-0001 January 24, 1994 4
Docket No. 50-336 Mr. John F. Opeka t
Executive Vice President, Nuclear Connecticut Yankee Atomic Power Company Northeast Nuclear Energy Company Post Office Box 270 Hartford, Connecticut 06141-0270
Dear Mr. Opeka:
SUBJECT:
MILLSTONE NUCLEAR POWER STATION, UNIT NO. 2, REVISED RESPONSE T0 IE BULLETIN 80-04, MAIN STEAM LINE BREAK (MSLB) REANALYSIS (TAC NO. M85504)
We have reviewed your letter dated January 13, 1993, concerning the reanalysis of MSLB and revised response to IE Bulletin 80-04. This reanalysis was implemented as a result of your discovery of errors in the original 1979 MSLB analysis and the finding that the containment response due to a MSLB and continued feedwater addition would result in the allowable pressure and temperature of the containment being exceeded.
You have implemented corrective plant modifications to preclude this unacceptable containment response and, with your January 13, 1993, submittal, provided a reanalysis of the MSLB.
The updated response indicates that:
(1) acceptable methodology has been used for the revised MSLB analysis and that the results of the analysis indicate that plant systems, structures and components in containment will not be exposed to unacceptable pressure or temperature conditions resulting from a design basis MSLB, and (2) the core response to the reanalyzed MSLB is no more severe than shown by previous analysis and is also acceptable.
Enclosed is a Supplemental Safety Evaluation addressing the containment and fuel responses to a MSLB.
Sincerely, Guy S. Vissing, Senior Project Manager Project Directorate I-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation 1
Enclosure:
Supplemental Safety Evaluation cc w/ enclosure:
See Next Page
l Mr. John F. Opeka Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit 2 I
CC:
Gerald Garfield, Esquire R. M. Kacich, Director Day, Berry and Howard Nuclear Planning, Licensing & Budgeting l
Counselors at Law Northeast Utilities Service Company City Place Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 J. M. Solymossy, Director J. P. Stetz, Vice President Nuclear Quality and Assessment Services Haddam Neck Plant Northeast Utilities Service Company Connecticut Yankee Atomic Power Company Post Office Box 270 362 Injun Hollow Road Hartford, Connecticut 06141-0270 East Hampton, Connecticut 06424-3099 Kevin T. A. McCarthy, Director Regional Administrator l
Monitoring and Radiation Division Region I l
Department of Environmental Protection U.S. Nuclear Regulatory Commission l
79 Elm Street 475 Allendale Road Hartford, Connecticut 06106-5127 King of Prussia, Pennsylvania 19406 Allan Johanson, Assistant Director First Selectmen Office of Policy and Development Town of Waterford 1
Policy Development and Planning Division Hall of Records l
80 Washington Street 200 Boston Post Road l
Hartford, Connecticut 06106 Waterford, Connecticut 06385 S. E. Scace, Vice President P. D. Swetland, Resident Inspector l
Nuclear Operations Services Millstone Nuclear Power Station Northeast Utilities Service Company c/o U.S. Nuclear Regulatory Commission Post Office Box 270 Post Office Box 513 l
Hartford, Connecticut 06141-0270 Niantic, Connecticut 06357 G. H. Bouchard, Nuclear Unit Director Charles Brinkman, Manager Millstone Unit No. 2 Washington Nuclear Operations l
Northeast Nuclear Energy Company ABB Combustion Engineering l
Post Office Box 128 Nuclear Power l
Waterford, Connecticut 06385 12300 Twinbrook Pkwy, Suite 330 Rockville, Maryland 20852 l
Nicholas S. Reynolds Winston & Strawn Donald B. Miller, Jr.
11400 L Street, NW Senior Vice President Washington, DC 20005-3502 Millstone Station Northeast Nuclear Energy Company Post Office Box 128 Waterford, Connecticut 06385
._