ML20038A857
| ML20038A857 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 11/09/1981 |
| From: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-SSINS-6820 14847, IEB-81-02, IEB-81-2, NUDOCS 8111240294 | |
| Download: ML20038A857 (4) | |
Text
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e Consumers power James W Cook Vice President - Projects, Es.gineersng and Construe:'.on General Offices: 1945 West Parnell Road, Jackson, MI 49201 + (517) 7880453 November 9, 1981
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MIDLAND PROJECT DOCKETS 50-329, 50-330 IE BULLETIN 81-02, SUPPLEMENT 1 FILE: 0505.12 SERIAL:
14847 IE Bulletin 81-02, Supplement 1, requested the verification of the presence or absence of any valves manufactured by Westinghouse Electro Mechanical Division, in particular their motor-operated gate valves.
CP Co's letter of May 15, 1981, Serial 12510, it response to IE Bulletin 81-02, stated that no valves of the type or service described in IE Bulletin 81-02, for use as power-operated relief valves (PORV) block valves or in other safety-related systems, are being used or planned for use in the design of the Midland Plant.
Our review in accordance with IE Bulletin 81-02, Supplement 1, has determined that the Midland Plant has procured 30 W-EMD manufactured motor-operated gate valves of the type in question. Twenty of the total 30 valves are safety-related. Of the 20, 12 must close against a differential pressure to perform a safety function. Ten valves have been purchased as spares.
The attached table gives the functional requirements, operating conditions, etc, for the Midland valves presently installed.
Functional requirement operating conditions for each valve closure has been reevaluated and confirmed that no problem exists with the closure of the 20 valves installed at the Midland Plant.
As a result of our review, the following corrective actions will be taken:
1.
The 20 installed valves will be used as is in their existing application.
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Valve data sheets and drawings for all 30 valves will be revised to reflect reevaluated differential pressure and/or the maximum permissible differential pressure.
3.
The above actions will be completed by April 1, 1982.
Based on our reevaluation and the corrective actions outlined, we do not consider the W-EMD valves to pose any problem in the safe operation of the tiidland Plant and thus consider this matter closed.
JWC/WJII/ fms CC RJCook, Midland Resident Inspector DSilood, NRC DBMiller, Midland NCMosely, NRC l
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o TABLE NO 1 VALVE FUNCTIONAL REQUIREMENTS FOR CLOSURE AND OPERATING CONDITIONS Functional Requirement Pressure Below Valve #/ Description Safety Related Function For Closure Which Valve Will Close W-EMD 14GM88NNH Valve closure required to permit de-O psi 1225 psi 1MO-1001A,1MO-1001B pressurization of RCS during transition A pressure cannot be 2MO-1101A,2MO-1101B to cold shutdown.
Core flood tank realized across the valve Core Flood Tank venting could be used as a backup if until it is closed and de-Isolation Valves valves did not close pressurization of the plant proceeds, which is lengthy compared to valve closure time.
No flow across valve during closure.
W-EMD 12GM88FNH Valve closure required to isolate 650 psi 1225 psi IMO-1011,1M0-1012 line break in DHR system 2MO-1111,2MO-1112 Decay Heat Removal Interlock closes valve if one of the O psi 1225 psi Letdown Isolation two valves in series is left open Pressure is O psi because Valves during plant heatup one of two valves in series is assumed already closed. No flow across valve during closure W-EMD 10GM88FNH Valves normally in locked open N/A 1200 psi 1MO-1020A,1MO-1020B postion. There is no safety 2MO-1120A,2MO-1120B related function to close DER Low Pressure Injection these valves Isolation Valves W-EMD 08GM84FEH There is no safety related function N/A 300 psi 1MO-1207A,1MO-1207B to close these valves 2MO-1307A,2MO-1307B Reactor Building Spray Pump Isolation Valves W-EMD 03GM82FBB Valves receive a closure signal from 75 psi 300 psi IMO-1411,2MO-1411 RBIS and would close if inadver-No flow across valves Refueling Canal tently left open. There is a locked, during closure Skimmer Overflow
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2 Functional Requirement Pressure Below Valve #/ Description Safety _Related Function For Closure Which Valve Will Close W-EMD 04GM82FDH Valves receive a closure signal from 75 psi 250 psi IMO-1257,2MO-1357 RBIS and would close if inadvertently Reactor Building Sump left open. There is a second air operated Drain Isolation Valves reactor building isolation valve in series with each valve.
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