ML20035C832
| ML20035C832 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 04/06/1993 |
| From: | Steven Bloom Office of Nuclear Reactor Regulation |
| To: | Tira Patterson OMAHA PUBLIC POWER DISTRICT |
| Shared Package | |
| ML20035C833 | List: |
| References | |
| TAC-M79675, NUDOCS 9304090130 | |
| Download: ML20035C832 (4) | |
Text
Dstknile UNITED STATES 3
T NUCLEAR REGULATORY COMMISSION
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- I., %j VVASHINGTON, D. C. 20555 April 6, 1993 Docket No. 50-285 Mr. Terry L. Patterson Division Manager - Nuclear Operations Omaha Public Power District 444 South 16th Street Mall Mail Stop BE/ EPA Omaha, Nebraska 68102-2?47
Dear Mr. Patterson:
SUBJECT:
EXEMPTION FOR PENETRATION M-3 FROM 10 CFR PART 50, APPENDIX J REQUIREMENTS (TAC NO. M79675)
By letter dated January 26, 1983, the licensee (Omaha Public Power District) of Fort Calhoun Station, Unit No.1, requested an exemption from the requirements of Appendix J for Type C leakage tests on the containment isolation valve (check valve CH-198) associated with the charging pump discharge header (penetration M-3.
the licensee p)oposed technical specification changes to Subsequently, by letter dated November 27, 1985, r
reflect the requested exemption.
Based on supporting documentation from the November 27, 1985, letter, the staff in a safety evaluation (SE) dated January 10, 1986, concluded that the containment isolation valve CH-198 met all requirements provided in Section III.C.2.(b) of 10 CFR Part 50 Appendix J for valves pressurized with fluid from a water seal system. Accordingly, the staff concluded that the proposed technical specification was acceptable and no exemption was needed.
By letter dated February 14, 1991, the licensee notified the staff of a revised containment pressure analysis indicating that for certain accident scenarios the post-LOCA containment pressure would remain above 6 psig far the initial 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and would remain above the water head existing in the charging pump system for the duration of the accident. Therefore, penetration M-3 would be a potential leakage path.
Consequently, the above exclusion of penetration M-3 from the Appendix J Type C test requirements was invalidated.
By letter dated May 1,1992, the licensee stated that the final corrective actions, which will require operator actions and associated procedures to isolate this potential containment leakage path, had been implemented. We have reviewed the licensee's corrective actions and prepared the enclosed SE.
Based on our review, we find that the basis for the exclusion of the lp pqm--
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m Mr. Terry L. Patterson,
containment isolation valves associated with penetration M-3 is acceptable.
Therefore, we consider the issue of Type C testing requirements for the above cited containment isolation valve resolved.
i Sincerely, ORIGINAL SIGNED BY:
Steven Bloom, Project Manager Project Directorate IV-1 Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation
Enclosure:
Exemption cc w/ enclosure:
See next page D_ISTRIBUTION:
Docket File NRC & Local PDRs PD4-1 r/f J. Roe T. Murley/F. Miraglia J. Partlow M. Virgilio G. Hubbard P. Noonan S. Bloom ACRS (10)
A. B. Beach i
J. Lieberman E. Jordan G. Hill (2)
OPA OC/: - ' '
J.
ciell, EDO (MS17G21)
OGC PD4-1 p/f
- See previous concurrence d\\
OFC LA:PD4-1 I:PD4-1)
PMAPD4-1 D:PD4-k OGCMMADR4/5 D:DRPW NAME pbhan CYateOi)
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DATE \\/i::/93 1/ 9/93 s/l4/93 3/7/93 3/5/93 4/I/93 Nb
/ /93 0FFICIAL RECORD COPY FILE NAME:
FC79675.EXE I
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Mr. Terry L. Patterson containment isolation valves associated with penetration H-3 is acceptable.
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Therefore, we consider the issue of Type C testing requirements for the above cited containment isolation valve resolved.
Sincerely, J
teven Bloom, Project Manager Project Directorate IV-I Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation r
Enclosure:
Exemption
,l cc w/ enclosure:
I See next page
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Mr. Terry L. Patterson Omaha Public Power District Fort Calhoun Station, Unit 1 l
CC:
Harry H. Voigt, Esg.
LeBoeuf,_ Lamb, Leiby & MacRae i
1875 Connecticut Avenue, NW Washington, D.C. 20009-5728 Mr. Jack Jensen, Chairman Washington County Board of Supervisors Blair, Nebraska 68008 t
Mr. Raymond P. Hullikin, Resident Inspector U.S. Nuclear Regulatory Commission Post Office Box 309 Fort Calhoun, Nebraska 68023 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations Combustion Engineering, Inc.
1 12300 Twinbrook Parkway, Suite 330 Rockville, MD 20852 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Harold Borchert, Director Division of Radiological Health Nebraska Department of Health 301 Centennial Hall, South Post Office Box 95007 Lincoln, Nebraska 68509
_j Mr. James W. Chase, Manager Fort Calhoun Station
. Post Office Box 399 i
Fort Calhoun, Nebraska 68023
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