ML17199F664
| ML17199F664 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities, 05000000 |
| Issue date: | 02/28/1986 |
| From: | Zwolinski J Office of Nuclear Reactor Regulation |
| To: | Farrar D COMMONWEALTH EDISON CO. |
| Shared Package | |
| ML17199F665 | List: |
| References | |
| TAC-42574, TAC-42580, TAC-42581, TAC-42608, TAC-59864, TAC-59865, TAC-59866, TAC-59867, NUDOCS 8603110141 | |
| Download: ML17199F664 (3) | |
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FEB 2 8 1986,,
Docket Nos. 50-237/249/254/265 Mr. Dennis L. Farrar Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690
Dear Mr. Farrar:
SUBJECT:
CONTAINMENT PURGE ANO VENT VALVES OPERABILITY ANO RAOIOLO~ICA~
CONSEQUENCES OF LOCA WHILE PURGING (TAC 59864, 59865, 59866, 59867~ 42580, 42581, 42608, 42574)
Re:
Dresden Unit Nos. 2 and 3 and Quad Cities Units 1 and ?.
The staff has completed its review of the operability of the 18-inch, 6-inch, and 4:inch containment purge and vent valves at the Dresden Station Units 2 and 3 and Quad Cities Station Units 1 and 2.
We also have completed our evaluation of the radiol;ogical consequences of a loss of coolant accident (LOCA) during containment purging at these stations.
We find that the ability of the valves to close from the fully open position against containment pressure in the event of a desiqn basis LOCA has been satisfactorily demonstrated from the information provided by Commonwealth Edison Company.
We find also that, based on the amount of steam released through the purge valves prior to post-LOCA closure, and the Technical Specification for maxim~m dose equivalent of Iodine-131 contained in the reactor coolant, the radiological consequences of a LOCA during purging at the Dresden and Quad Cities facilities would be within 10 CFR Part 100 dose guideline values, and are acceptable.
Please submit within 90 days any Technical Specification changes that would be appropriate to ensure continued dependable operability of the containment purge and vent valves at the Dresden and Quad Cities facilities.
Copies of our safety evaluations are enclosed.
Enclosures:
Safety Evaluations Sincerely,
~~-
John A. Zwolinski, Director BWR Project Directorate #1 Division of BWR Licensing DISTRIBUTION SQock~~
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Docket Nos.
50~237/249/254/265 Mr. Dennis L. Farrar Director of Nuclear Licensinq Commonwealth Edison Company -
Post Office Box 767 Chicago, Illinois 60690
Dear Mr. Farrar:
February 28, 1986
SUBJECT:
CONTAINMENT PURGE AND VENT VALVES OPERABILITY AND RADIOLOGICAL CONSEQUENCES OF LOCA WHILE PURGING (TAC 59864, 59865, 59866, 59867, 42580, 42581, 42608, 42574)
Re:
Dresden Unit Nos. 2 and 3 and Quad Cities Units 1 and 2 The staff has completed its review of the operability of the 18-inch, 6-inch, and 4-inch containment purqe and vent valves at the Dresden Station Units 2 and 3 and Quad Cities Station Units 1 and 2.
We also have completed our evaluation of the radioloQical consequences of a loss of coo~ant accident (LOCA) during containm~nt purging at these stations.
We find that the ability of the valves. to close from the fully open position against containment pressure in the event of a design basis LOCA has been satisfactorily demonstrated from the information provided by Commonwealth Edison Company.
We find also that, based on the amount of steam released through the purge valves prior to post-LOCA closure, and the Technical Specification for maximum dose equivalent of Iodine-131 contained in the reactor coolant, the radiological consequences of a LOCA during purqing at the Dresden and Quad Cities facilities would be within 10 CFR Part 100 dose guideline values, and are acceptable.
Please submit within 90 days any Technical Spectfication changes that would be appropriate to ensure continued dependable operability of the containment purge and vent valves at the Dresden and Quad Cities facilities.
Copies of our safety evaluations are enclosed.
Enclosures:
Safety Evaluations cc w/enclosures:
See next page Sincerl4-~ U, Jo~~ Zwolinski, Director B~~np~\\ject Directorate #I Division of BWR Licensing
Mr. Dennis L. Farrar Commonwealth Edison Company cc:
Mr. B. C. O'Brien President Iowa-Illinois Gas and Electric Company 206 East Second Avenue Davenport, Iowa 52801 Robert G. Fitzgibbons, Jr.
Isham, Lincoln & Beale Three First National Plaza Suite 5200 Chicago, Illinois 60602 Mr. Nick Kalivianakis Plant Superintendent Quad Cities Nuclear Power Station 22710 - 206th Avenue - North Cordova, Illinois 61242 Resident Inspector U. S. Nuclear Regulatory Commission.
22712 206th Avenue North Cordova, Illinois 61242 Chairman Rock Island County Board of Supervisors Rock Island County Court House Rock Island, Illinois 61201 Mr. Gary N. Wright Nuclear Facility Safety Illinois Department of Nuclear Safety 1035 Outer Park Drive, 5th Floor Springfield, Illinois 62704 Regional Administrator, Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Doug Scott Plant Superintendent Dresden Nuclear Power Station Rural Route #1 Morris, Illinois 60450 Dresden Nuclear Power Station Units 1, 2 and 3 and Quad Cities Nuclear Power Station, Units 1 and 2 U. S. Nuclear Regulatory Commission Resident Inspectors Office Dresden Station Rural Route #1 Morris, Illinois 60450 Chairman Board of Supervisors of Grundy County Grundy County Courthouse Morris, Illinois 60450