ML19345C889
| ML19345C889 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/10/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Arnold R METROPOLITAN EDISON CO. |
| References | |
| NUDOCS 8012080549 | |
| Download: ML19345C889 (1) | |
Text
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UNITED STATES 8
NUCLEAR REGULATORY COMMISSION g
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j REGION I 0,
g 631 PARK AVENUE
,e KING oF PRUSSIA, PENNSYt.VANIA 19406 Docket Nos. 50-289 November 10, 1980 50-320 Metropolitan Edison Company 2
ATTN:
Mr. R. C. Arnold s
Senior Vice President 100 Interpace Parkway Parsippany, New Jersey 07054 f
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.8 Gentiemen:
The enc. lased IE Information Notice No. 80-41, " Failure of Swing Check Valve in the Decay Heat Removal System at Davis-Besse Unit No.1," is forwarded to you for information.
No written respan=e is required.
If you desire additional information regarding this matter, please contact this office.
Sincerely,
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Boyce H. Grier Director
Enclosures:
T.
IE Information Notica No. 80-41 2.
List of Recently Issued IE Information Noticas CONTACT:
E. G. Greenman (215-337-5267) cc w/encis:
H. D. Hukill, Director, TMI-1 J. G. Herbein, Director - Nuclear Assurance E. G. Wallace, Licensing Manager R. J. Toole, Manager, Unit 1 J. J. Colitz, Manager, Plant Engineering, Unit 1 J. J. Barton, Manager Site Operations, Unit 2
- 8. Elam, Manager, Plant Engineering, Unit 2 R. F. Wilson, Director - Technical Functions L. W. Han ding, Supervisor of Licensing G. K. Hovey, Director, Unit 2 I. R. Finfrock,.ir.
R. W. Conrad J. B. Lieberman, Esquire G. F. Trowbridge, Esquire Ms. Mary V. Southard, Chairperson, Citizens for a Safe Environm 8012080 N
SSINS No.:
6835 Accession No.:
8008220260 UNITED STATES IN 80-41 i
NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
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L, November 10, 1980 IE Information Notice No. 80-41:
FAILURE OF SWING CHECK VALVE IN THE DECAY HEAT REMOVAL SYSTEM AT DAVIS-BESSE UNIT NO. 1 Descriotion of Circumstances:
On October 9,1980 the resident inspector at the Davis-Besse facility was informed that the licensee had performed leak rate tests and identified exces-sive leakage through Decay Heat Removal System check valve CF-30.
Valve CF-30 is the inboard one of two in-series check valves that is used to isolate the reactor coolant system from the low pressure decay heat removal system.
On further investigation the licensee found that the valve disc and arm had separated from the valve body and was lodged just under the valve cover plate.
The two 2 5/8 x 5/8 inch colts and locking mechanism for the bolts that holds the arm to the valve body were missing and have not been located. The CF-30 valve is a 14 inch swing check valve manufactured by Velan Valve Corporation.
The cause of the failure has not been identiffed.
2 The test that was in progress when the failure was identified was being. con-ducted in response' to: a letter from Darrell G. Eisenhut, Office of' Nuclear Reactor Regulations to all Light Water Reactor Licensees, LWR Primary Coolant System Pressure Isolation Valves, February 23, 1980.
This IE Information Notice is provided as an early notification of a possibly significant matter that'is still under review by the NRC staff.
It is expected that recipients will review the information for possible applicability co their facilities.
No specific action or response is requested at this time.
If NRC evaluations so indicate, further licensee actions may be requested or required.
No written response to this IE Information Notice is required.
If you have any questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
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I IE Information Notice No. 80-41 November 10, 1980 RECENTLY ISSUED IE INFORMATION NOTICES Information Subject Date Issued to Notice No.
Issued i
80-40 Excessive Nitrogen 11/6/80 All holders of i
i Supply Pressure a power reactor OL Activates Safety-Relief or CP Valve Operation to Cause Reactor Depressurization 80-38 Cracking in Charging 10/30/80 All holders of Pump Casing Cladding a PWR power reactor OL or CP 80-37 Containment Cooler 10/24/80 A'il holders of a Leaks and. Reactor power reactor OL Cavity Flooding at or CP Indian Point Unit 2 80-36 Failure of Steam 10/10/80 All holders of a Generator Support power reactor ;
Bolting-OL or CP 80-35 Leaking and Dislodged 10/10/80 All holders of a Iodine-125 Implant Category G or G1 Seeds Medical License 80-34 Baron Oilution of 9/26/80 All holders of a Reactor Coolant During PWR Power Reactor OL Steam Generator Oecontamination 80-33 Determination of 9/15/80 All holders of Teletherapy Timer a teletherapy Accuracy license 80-32 Clarification of 9/12/80 All holders of-Certain Requirements an NRC or Agreement for Exclusive-use State License i
Shipments cf Radioactive Materials
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80-31 Maloperation of Gould-8/27/80 All holders of Brcwn Boveri 480V-Type a power reactor K-6005 and K-Don 6005 OL or CP l
Circuit Breakers m~m.
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