ML20034E601
| ML20034E601 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 02/22/1993 |
| From: | Andersen J Office of Nuclear Reactor Regulation |
| To: | Opeka J CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| GL-92-04, GL-92-4, TAC-M84289, NUDOCS 9303010055 | |
| Download: ML20034E601 (2) | |
Text
i February 22, 1993 g
Docket No. 50-245 Distribution:
LDocket File ACRS (10)
NRC & Local PDRs LTDoerflein, RI Mr. John F. Opeka PD I-4 Plant Executive Vice President, Nuclear SVarga Connecticut Yankee Atomic Power Company JCalvo Northeast Nuclear Energy Company SNorris Post Office Box 270 JAndersen Hartford, Connecticut 06141-0270 OGC JClifford
Dear Mr. Opeka:
RJones
SUBJECT:
RESPONSE TO GENERIC LETTER 92-04, " RESOLUTION OF THE ISSUES RELATED TO REACTOR VESSEL WATER LEVEL INSTRUMENTATION IN BOILING WATER REACTORS" (TAC NO. M84289)
This letter acknowledges receipt of Northeast Nuclear Energy Company's (NNECO's) response of September 25, 1992, to Generic Letter (GL) 92-04 GL 92-04 was issued by letter dated August 19, 1992, to all operating boiling water reactor licensees.
GL 92-04 requested licensees to promptly assess the impact on their facilities of potentially erroneous level indication due to non-condensible gases, and to implement compensatory measures and long term corrective actions as necessary.
NNEC0's September 25, 1992, letter described its engineering evaluation and completed modifications to the reactor vessel water level instrumentation.
Specifically, the modifications involved the addition of tubing, valves, and flow control and measuring devices to interconnect the water supplied to the control rod drive system with the reference legs to provide a constant purge fl ow.
The modification was designed to prevent the buildup of non-condensible gases in the reference legs.
The NRC staff has reviewed NNEC0's modifications and find them acceptable.
It is requested that NNECO inform the NRC, following the next scheduled outage, on the success of their modifications to the reactor vessel water level instruments.
l 1
Sincerely, Original signed by James W. Andersen, Acting Project Manager Project Directorate I-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation i
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d-Nr. John F. Opeka Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit 1 CC' Gerald Garfield, Esquire R. M. Kacich, Director 1
Day, Berry and Howard Nuclear Licensing Counselors at Law Northeast Utilities Service Company City Place Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 W. D. Romberg, Vice President D. O. Nordquist Nuclear, Operations Services Director of Quality Services Northeast Utilities Service Company Northeast Utilities Service Company Post Office Box 270 Post Office Box 270 Hartford, Connecticut 06141-0270 Hartford, Connecticut 06141-0270 Kevin McCarthy, Director Regional Administrator Radiation Control Unit Region I Department of Environmental Protection U.S. Nuclear Regulatory Commission State Office Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 Allan Johanson, Assistant Director First Selectmen Office of Policy and Management Town of Waterford Policy Development and Planning Division Hall of Records 80 Washington Street 200 Boston Post Road Hartford, Connecticut 06106 Waterford, Connecticut 06385 S. E. Scace, Nuclear Station Director P. D. Swetland, Resident Inspector Millstone Nuclear Power Station Millstone Nuclear Power Station Northeast Nuclear Energy Company c/o U.S. Nuclear Regulatory Commission Post Office Box 128 Post Office Box 513 Waterford, Connecticut 06385 Niantic, Connecticut 06357 H. F. Haynes, Nuclear Unit Director Mr. Paul Blanch Millstone Unit No. I 135 Hyde Road Northeast Nuclear Energy Company W. Hartford, Connecticut 06117 Post Office Box 128 Waterford, Connecticut 06385 Mr. Ernest Hadley 414 Main Street Nicholas S. Reynolds Post Office Box 3121 Winston & Strawn Wareham, Massachusetts 02571 1400 L Street, NW Washington, DC 20005-3502