ML20004F329
| ML20004F329 | |
| Person / Time | |
|---|---|
| Site: | Monticello, Dresden, Davis Besse, Palisades, Perry, Fermi, Kewaunee, Point Beach, Byron, Braidwood, Prairie Island, Callaway, Duane Arnold, Clinton, Cook, Quad Cities, La Crosse, Big Rock Point, Zion, Midland, LaSalle, Zimmer, Bailly, Marble Hill  |
| Issue date: | 04/10/1981 |
| From: | Carroll D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 8106180165 | |
| Download: ML20004F329 (2) | |
Text
,5 APR 101S81 R es.cn E Gentlemen:
The enclosed IE Bulletin No. 81-02 titled " Failure of Gate Type Valves to Close against Differential Pressure" was sent to the licensees lisced below for action on April 9, 1981:
American Electric Power Service Corporation Indiana and Michigan Power Company D. C. Cook 1, 2 (50-315, 50-316)
Cincinnati Gas & Electric Company Zimmer (50-358)
Cleveland Electric Illuminating Company Perry 1, 2 (50-440, 50-441)
Commonwealth Edison Company Braidwood 1, 2 (50-456, 50-457)
Byron 1, 2 (50-454, 50-455)
Dresden 1, 2, 3 (50-10, 50-237, 50-249)
LaSalle 1, 2 (50-373, 50-374)
Quad-Cities 1, 2 (50-254, 50-265)
Zion 1, 2 (50-295, 50-304)
Consumers Power Company
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Big Rock Point (50-155)
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Midland 1, 2 (50-329, 50-330) j*'
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Palisades (50-255)
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APR i41981 m g Dairyland Power Cooperat.ive usei % %,
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LACBWR (50-409) 4 8*****
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Detroit Edison Company 4
'8 Fermi 2 (50-341) 43 Illinois Power Company Clinton 1, 2 (50-461, 50-462)
Iowa Electric Light & Power Company Duane Arnold (50-331) 81061 g a
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Illinois Department of APR 101981 CDPV Nuclear Safety Northern Indiana Public Service Company Bailly (50-367)
Ncrthern States Power Company Monticello (50-263)
Prairie Island 1, 2 (50-282, 50-306)
Public Service of Indiana Marble Hill 1, 2 (50-546, 50-547)
Toledo Edison Company Davis-Besse 1 (50-346)
Union Electric Company Callaway 1, 2 (50-483, 50-486)
Wisconsin Electric Power Company Point Beach 1, 2 (50-266, 50-301)
Wisconsin Public Service Corporation Kewaunee (50-305)
Sincerely, Dorothy E. Carroll, Chief Word Processing and Document Control Section
Enclosure:
~
e Carroll /so 4/9/81
s SSIN No. 6820 Accession No.
8011040283 IEB 81-02 UNITED STATES NUCLEAR REGULATORY COMMISSION 0FFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 April 9, 19i1 IE Bulletin No. 81-02:
FAILURE OF GATE TYPE VALVES TO CLOSE AGAINST DIFFERENTIAL PRESSURE Descriction of Circumstances:
As a part of its pressurized water reactor (PWR) Safety and Relief Valve Testing Program, the Electric Power Research Institute (EPRI) conducted limitec testing of a number of valves usec on PWRs as power-operated relief valve (PORV) isolation or block valves.
These tests incicate a number of cases in which certain of these valves failed to fully close under conditions that approximatec those of their intended service (i.e., saturated steam at approximately 2,400 psi).
The valves that failed to fully close are gate type motor-operated walwes that may be used in various safety-related applications in adoition to PORV block valves.
Backe-ound on EPRI Testinc:
The proposed full-scale qualification testing of PORV block valves, with a completion date of July 1,1982, was first provided to the utilities in a September 5, 1980, draft of NUREG-0737.
The item was formally issued, witn Commission approval, in NUREG-0737 on October 31, 1980.
The block valve qualification testing was proposed in NUREG-0737 primarily as an additional means of red u the number of challenges to the emergency core cooling system and the safets alves during plant. operation.
In anticipating a request for PWR block valve testing, EPRI decided to make provisions for the installation of block valves between the test steam source and the test PORV in July 1980 at the Marshall test facility.
The Marshall test facility is a full-flow steam test facility owned by Duke Power Company.
Test PORVs had been carefully selected, with close coordination between EPRI, its consultants ard PWR utilities, to assure that PORVs representative of those in service or intended for service would be tested.
However, for the block valves that have been tested concurrently, this selection process was not followed because an NRC block valve test program had not been formulated.
Therefore, seven readily available valves were obtained and tested by EPRI, primarily to obtain some general baseline information on block valve closure
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