ML20033F076
| ML20033F076 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/08/1990 |
| From: | Boyle M Office of Nuclear Reactor Regulation |
| To: | Mroczka E CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| TAC-65538, NUDOCS 9003150412 | |
| Download: ML20033F076 (2) | |
Text
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f' March 8,1990 Doc'ket No. 50-245 Mr. Edward J.' Mroczka Senior Vice President Nuclear Engineering and Operations
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Connecticut Yankee Atomic Power Company
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Northeast Nuclear Energy Company l
P. O. Box 270 Hartford, Connecticut 06141-0270 i
Dear Mr. Mroczka:
SUBJECT:
INTERPRETATION OF TECliNICAL SPECITICATION 3.7.A.6.c -
MILLSTONE HUCLEAR POWER STATION, UNIT NO. 1 (TAC NO. 65538)
The purpose of this letter is to respond to your interpretation of the phrase "important to safety," which appears in Technical Specification (TS) 3.7. A.6.c.
" Containment Systems - Oxygen Concentration," made in a "B13110, Application for Amend to License NPF-49,extending Interval That Accumulator Can Be Inoperable,Due to [[Atomic Element" contains a listed "[" character as part of the property label and has therefore been classified as invalid. Concentration Outside Required Limit or for Reason Other than Closed Isolation Valve from 1 H to 72 H|letter dated December 11, 1989]]. That TS states that:
"0xygen concentration may be greater than 4% by volume for a period not to exceed 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> for the purpose of conducting drywell entries relating to testing, strveillances, or maintenance of equipment important to J
safety. "
It is the staff's position that containment entry, while the plant is in power operations, should be made only when warranted so that the containment will be in a de-inerted condition as seldom as possible and so that personnel exposure will be kept to as-low-as-reasonably-achievsble. Containment entry for testing, surveillance or maintenance of equipnent is 2istification for containment entry if that equipment is-important to safety, that is, the equipment is safety-related or the equipment, if inoperable, will affect the operability of safety-related equipment. Otherwise, containnent entry should only be made when the plant is not in power operations.
It is also the staff's position that interpreting the phrase "important to safety" to nean "necessary to ensure safe plant operation" results in a vague criterion that has no regulatory meaning.
Sincerely,
/s/
ADOCK0500g5('
9003150412 900308 Michael L. Boyle, Project Manager
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PDR Project Directorate I-4 P
Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION NeiiEN1e%
NRC & Local PDRs Plant File S.Varga(14E4)
B. Boger (14A2)
S. Norris le M. Boy (10)
OGC E. Jordan (MNBB 3302)
ACRS P
m 3/ 8 /90 3/%/90 3/$/90 9e i
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Mr. Edward J. Mroczka Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit No. 1 cc:
l Gerald Garfield, Esquire R. M. Kacich, Manager i
Day, Berry and Howard Generation Facilities Licensing Counselors at Law Northeast Utilities Service Company City Place Post Office Bcx 270 i
Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270
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W. D. Romberg, Vice President D. O. Nordquist Nuclear Operations 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 Bradford S. Chase, Under Secretary First Selectmen Energy Division Town of Waterford Office of Policy and Management Hall of Records 80 Washington Street 200 Boston Post Road Hartford, Connecticut 06106 Waterford, Connecticut 06385 S. E. Scace, Nuclear Station Director W. J. Raymond, Resident Inspector -
Millstone Nuclear Power Station Millstone Nuclear Power Station Northeast Nuclear Energy Company c/o U. S. Nuc' lear Regulatory Commission P3st Office Box 128 Post Office Box 811 1.aterford, Connecticut 06385 Niantic, Connecticut 06357 J. P. Stetz, Nuclear Unit Director Millstone Unit No. I Northeast Nuclear Energy Company
, Post Office Box 128 Waterford, Connecticut 06385
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