ML19340E095
| ML19340E095 | |
| Person / Time | |
|---|---|
| Site: | Marble Hill |
| Issue date: | 11/10/1980 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Shields S PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA |
| References | |
| NUDOCS 8101060379 | |
| Download: ML19340E095 (2) | |
Text
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'o UNITED STATES E
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j NUCLEAR REGULATORY COMMISSION r
I.EGION lli
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7se ROLSEVELT ROAD o,
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e" GLEN ELLYPs. 3LLINois 60137 November 10, 1980 Those on Attached Address Listing:
This IE Information Notice No. 80-41 is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the information for possible applicability to their facilities. No specific action or response is requested at this time.
If further NRC evaluations so indicate, an IE Circular or Bulletin will be issued to recommend or request specific licensee actions.
If you have questions regarding this matter, please contact the this office.
Sincerely, W
(/
James G. Keppler /
Director
Enclosure:
IE Information Notice No. 80-41 I
cc w/ enc 1:
Mr. D. W. Kane, Sargent & Lundy Mr. Gary N. Wright, Chief Division of Nuclear Safety Reproduction Unit NRC 20b l
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810106037i h
RIII's CORPORATE ADDRESSES FOR OPERATING LICENSEES AND CONSTRUCTION PERMIT HOLDERS i
Docket No. 50-263 Docket No. 50-282
<3 Docket No. 50-306 hi u
Northern States Power Company E,2 Pt?
ATTN:
Mr. Dennis E. Gilberts
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'd Vice President Power Production and System
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Ci$j9 Operation 414 Nicollet Mall ri oc Minneapolis, MN 55401 O
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Mr. W. A. Shamla, Resident Inspectors, RIII Plant Manager PDR Mr. F. P. Tierney, Jr.,
Local PDR Plant Manager NSIC Central Files TIC Director, NRR/DPM John W. Ferman, Ph.D.,
Director, NRR/ DOR Nuclear Engineer, MPCA AEOD Docket No. 50-546 Docket No. 50-547 Public Service of Indiana ATTN:
Mr. S. W. Shields Senior Vice President Nuclear Division Post Office Box 190 New Washington, IN 47162 cc w/ enc 1:
Mr. Steve J. Brewer, Nuclear Safety and Licensing Super /isor LeBoeuf, Lamb, Leiby & MacRae Central Files Mr. Dave Martin, Office of the Director, NRR/DPM Attorney General Director, NRR/ DOR Mr. John R. Galloway, Staff PDR Director, Environment, Energy Local PDR and Natural Resources Subcommittee NSIC 4
v s
E SSINS No.:
6835 Accession No.-
8008220260 UNITED STATES IN 80-41 j
NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 November 10, 1980 l
IE Information Notice No. 80-41:
FAILURE OF SWING CHECK VALVE IN THE DECAY HEAT REMOVAL SYSTEM AT DAVIS-BESSE UNIT NO. 1 Description 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 l
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 l
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 bolts and locking mechanism for the bolts that hold 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 identified.
The test that was in progress when the failure was identified was being con-ducted in response to a letter from Darrell G. Eisenhet, 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 to 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.
I No written response to this IE Information Notice is required.
If you have l
any questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
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