ML20011B249
| ML20011B249 | |
| 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: | 12/03/1981 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-SSINS-6835, REF-SSINS-SSINS-6 NUDOCS 8112080238 | |
| Download: ML20011B249 (1) | |
Text
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ggg 1 1.'id TI-3'b American Electric Power Service Corporation D. C. Cook 1, 2 (50-315, 50-316)
Cincinnati Gas and Electric Company
-Zimmer (50-358)
The Cleveland Electric Illuminating Company Perry 1, 2 (30-440, 50-441)
Commonwealth Edison Company
' B raidwood - 1, 2 (50-456,-50-457)
Byron 1,~2 (50-454, 50-455)
Dresden 1, 2, 3 (50-10, 50-237, 50-249)
La Salle 1, 2 (50-373, 50-374)
Quad-Cities 1, 2 (50-254, 50-265)
Zion 1, 2 (50-295, 50-304)
Consumers Power Company Big Rock Point (50-155)
Palisades (50-255)~
Midland 1, 2 (50-329, 50-330)
-e Dairyland Power Corporation LACBWR (50-409)
The Detroit Edison Company Fermi 2 (50-341)
Illinois Power Comp: y Clinton 1, 2 (50-461, 50-462)
Iowa Electric Light and Power Company Duane Arnold (50-331)
Northern Indiana Public Service Company Bailly (50-367)
Northern States Power Company Qio p[\\M N /,
Monticello (50-263)
Prairie Island I, 2 (50-282, 50-306) d Public Service of Indiana
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Marble Hill 1, 2 (50-546, 50-547)
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-Davis-Besse 1 (50-346)
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Cillaway 1, 2 (40-483, 50-486)
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-o Wisconsin Electric Power Company 5@
Point Beach 1, 2 (50-266, 50-301) eog Wisconsin Public Service Corporation "o
Kewaunee (50-305)
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Illinois Department of Nuclear Safety C$
Gary N. Wright, Manager, Nuclear Facility Safety T,,t* _3 \\
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SSINS No.:
6835 Accession No.:
8107230039 IN 81-36 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 December 3, 1981 IE INFORMATION NOTICE NO. 81-36:
REPLACEMENT DIAPHRAGMS FOR ROBERTSHAW VALVE (MODEL NO. VC-210)
Description of Circumstances:
The Georgia Power Company's Hatch 1 facility experienced problems in early July 1981 with the Robertshaw Diaphragm Control Valve (Model No. VC-210) installed in the Terry Turbine Mechanical Hydraulic Overspeed Complex which contributed toward unreliability of the High Pressure Ccolant Injection (HPCI) system.
During a routine inspection of the valve, it was discovered that the diaphragm supplied by Robertshaw was enlarged and leaking oil.
The diaphragm was replaced on July 12, 1981 and failed again on July 21 and August 11, 1981.
The cause of the failures was determined to be incompatibility of a neoprene replacement diaphragm, supplied by Robertshaw, with oil in the hydraulic overspeed complex.
Following the August 11, 1981 failure, a fabric-reinforced Buna-N diaphragm was installed.
The diaphragm satisfied the following service conditions:
Compatible with the turbine oil recommended by the turbine vendor 40 psig maximum service pressure 250 F maximum service temperature 1000 minimum cycles Replacement Buna-N diaphragms are available from Terry Corporation or through the General Electric Company.
An order placed directly with Robertshaw will result in the supply of a thin, non-reinforced neoprene diaphragm with reduced duty cycle life because the valves are supplied for other applications. We understand that the reinfnrced Buna-N diaphragm should be identified as Terry piece No. 890151A01 on the purchase order.
Also, if a replacement Robertshaw Valve (Model No. VC-210) is ordered (Terry piece No. 107282A01), it is necessary to separately order the reinforced diaphragm (Terry piece No. 890151A01). The diaphragm is shown in the Terry HPCI Instruction Manual, Section 15-M-14, In-struction for Robertshaw Diaphragm Control Valve No. VC-210, Figure 14,-Part 4.
This information notice on replacing diaphragms is being provided as an early notification of a potentially significant matter.
This experience with diaphragm failures serves as a reminder that a single material change may adversely affect safety system reliability.
Such a change may reduce service life or negate environmental qualification.
Each component or material change in a system important to safety should be carefully reviewed in order to assure system operability.
Recipients should review the information for possible applicability to their facilities.
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-IN 81-36
-December 3, 1981 Page 2 of 2:
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- No written response to'this information notice is required.
For additional information regarding this matter, contact the Regional Administrator of the j
appropriate NRC Regional Office.
Attachment:
Recently issued IE Information Notices i
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Attachment IN 81-36 December 3, 1981 RECEUTLY ISSUED IE INFORKKriON NOTICES Information Date of Notice No.
Subject Issue Issued to 81-35 Check Valve Failures 12/2/81 All power reactor facilities with an OL or CP 81-34 Accidental Actuation of 11/16/81 All power reactor Prompt Public Notification facilities with an System OL or CP 81-33 Locking Devices Inadequately 11/9/81 All power reactor Installed on Main Steam facilities with an Isolation Valves OL or CP 81-32 Transfer and/or Disposal of 10/23/81 All medical licensees Spent Generators 81-31 Failure of Safety Injection 10/8/81 All power reactor Valves to Operate Against facilities with an Differential Pressure OL or CP 81-30 Velan Swing Check Valves 9/28/81 All power reactor facilities with an OL or CP 81-29 Equipment Qualification 9/23/81 All power reactor Testing Experience facilities with an OL or CP 81-28 Failure of Rockwell-Edward 9/3/81 All power reactor Main Steam Isolation Valves facilities with an OL or CP 81-27 Flammable Gas Mixtures 9/3/81 All power reactor in the Waste Gas Decay facilities with an Tanks in PWR Plants OL or CP 81-26 Compilation of Health 9/3/81 All power reactor Physics Related Information facilities with an Items OL or CP 81-25 Open Equalizing Valve 8/21/81 All power reactor of Differential Pressure facilities with an Transmitter Causes Reactor OL or CP Scram and Loss of Redundant Safety Signals OL = Operating License CP = Construction Permit
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