ML17195A008
| ML17195A008 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities, 05000000 |
| Issue date: | 11/04/1983 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Farrar D COMMONWEALTH EDISON CO. |
| Shared Package | |
| ML17195A009 | List: |
| References | |
| LSO5-83-11-017, LSO5-83-11-17, NUDOCS 8311080223 | |
| Download: ML17195A008 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, 0. C. 20555 November 4, 1983 Docket Nos. 50-237/249/254/265 LS05-83-ll-017
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Mr. Dennis L. Farrar Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690
Dear Mr. Farrar:
SUBJECT:
CONTAINMENT ISOLATION DEPENDABILITY BY DEMONSTRATION OF CONTAINMENT PURGE AND VENT VALVE OPERABILITY Re:
Dresden Nuclear Power Station, Unit Nos. 2 and 3 Quad Cities Station, Unit Nos. l and 2 The staff with technical assistance from Brookhaven National Laboratory has completed its review of information submitted by* Commonwealth Edison concerning operability of containment purge and vent valves for Dresden Units 2 and 3 and Quad Cities l and 2.
Our review is documented in the enclosed Safety Evaluation.
We find that the information submitted failed to demonstrate the ability of these valves to close against the buildup of containment pressure in the event of a DBA/LOCA.
For this reason the purge and vent valves should be sealed closed in accordance with SRP Section 6.2.4.II.6.f. Furthermore, these valves should be verified closed at least once every 31 days.
Commonwealth Edison should either comply with the staff's requirement as stated in SRP Section 6.2.4.II.6.f or, within 30 days of receipt of this letter, provide the bases that would demonstrate the operability of. the containment purge and vent valves in order to permit their continued use during operating modes 1, 2, 3 and 4.
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Mr. Dennis November 4, 1983 The reporting and/or re~ordkeeping requirements contained in this letter affect fewer than ten respondent's; therefore, OMB clearance is not required under P.L.96-511.
Enclosure:
Safety Evaluation cc w/enclosure:
See next page DISTRIBUTION
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Mr. Dennis L. Farrar cc Isham, Lincoln & Beale Counselors at Law One First National Plaza, 42nd Floor Chicago, Illinois-60603 Mr. B. B. Stephenson Plant Superintendent Dresden Nuclear Power Station Rural Route #1 Morris, Illinois 60450 U. S. Nuclear Regulatory Co1TD11ission Resident Inspectors Office Dresden Station Rural Route #1 Morris, Illinois 60450 Chairman Board of Supervisors ~f,
Grundy County Grundy County Courthouse Morris, Illinois 60450 U. S. Environmental Protection Agency Federal Activities Branch Region V Office ATTN:
Regional Radiation Representative 230 South Dearborn Street Chic290, Illinois 60604 James G. Keppler, Regional Administrator Nuclear Regulatory Co1TD11ission, Region III 799 Roosevelt Street Glen Ellyn, Illinois 60137 Mr. Gary N. Wright, Manager Nuclear Facility Safety Illinois Department of Nuclear Safety 1035 Outer Park Drive, 5th Floor Springfield; Illinois 62704