ML20234D561
| ML20234D561 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Quad Cities |
| Issue date: | 11/16/1972 |
| From: | Skovholt D US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Seiss C Advisory Committee on Reactor Safeguards |
| Shared Package | |
| ML20234A777 | List:
|
| References | |
| FOIA-87-40 NUDOCS 8707070259 | |
| Download: ML20234D561 (2) | |
Text
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UNITED STATES
' ATOMIC ENERGY COMMISSION -
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WASHINGTON, D.C. 20545
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,#s,n e November 16, 1972 u
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' Docket No. 50-265 L 19. -
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C i Ari.T'APDS Dr. Chester P. Siess i
Chairman, Advisory Cormittee l
on Beactor Safeguards U. S. Atomic Ehergy Comission Washington, D. C.
20545
Dear Dr. Siess:
Sixteen '(16) copies of the following am transmitted for the Comittee's information:
Letter from Commonwealth Edison Company dated November 3, 1972, reporting failure of the Quad-Cities Unit 2 HPCI turbine stop valve to open.
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- Sincemly, A
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Donald J.
vholt Assistant Dimetor for Operating Beactors Dimetorate of Licensing Ehclosures:
As stated
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B707070259 870610 PDR FOIA THOMAS 87-40 PDR-
L 0FFICIAL USE ONLY SUPPLEMENT NO. 160 CATEGORY B Ouad Cities Unit 2 November 29, 1972 e
Bei Malfunction of HPCI Turbine Stop Valve
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M*G ACRS Comenonwealth Edison Company letter dated Novessber 3.1972 g.(
that the HPCI turbine stop valve failed to open.
On October 20, 1972, with the Unit 2 rsector at 45 per cent power, the HPCI System was to be run in conjunction with a special test designed to mor.itor torus pressure waves and displacement during an electromatic relief valve actuation and EPCI operation. The HPCI turbine stop valve would not open, however, and the system was declared inoperable.
While the unit was being cooled down, the HPCI turbine operated satisfactorily on October 21, 1972. Attempts later in the day to duplicate the problen, with the stop valve were unsuccessful.
During the investigation of this problem, a ground in the 250 yde system was found and poor operating practice led to damage of another valve. The cause of the HPCI turbine stop valve malfunction.
was not definitively found but normal operation was restored.
No ACRS action is recommended.
The enclosed material may be discarded after your review.
(JCM)
Quad Cities HMH Proposed Technical Specifiestion Changes ACRS Coannonwealth Edison Company letter d_ated November (a,1972 substits a proposal to modify the licenses to include all byproduct material currently covered by a materials license and to update the Technical Specifications. Changes to the Technical Specifications l
cover:
1 l 7 1.
Low pressure trip point for core cooling pump l
2.
Rod position indicator system operability 3.
Rod worth minimiser 4
Control rod drive surveillance requirements 5.
Assurance that the ECCS systems are full of water 6.
Jet pump performance 7.
Temperature limits on suppression pcol water 8.
Non nuclear operating parameters
- 1 No ACRS action is recournended. The enclosed material should be
, - r <.- s a w s n ACRS Regu latory Staff action.
omct>
(JCM)
JCM:biw ME >
DATE >
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Form AIC-H s gRev. 9-5.1) Al'CM 0240
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