ML20209F691
| ML20209F691 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 05/15/1986 |
| From: | Tiernan J BALTIMORE GAS & ELECTRIC CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-85-003, IEB-85-3, NUDOCS 8609120231 | |
| Download: ML20209F691 (4) | |
Text
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B ALTIMORE G AS AND s
ELECTRIC r
CHARLES CENTER P. O.80X 1475 BALTIMORE. MARYLAND 21203 JoSCPH A. TIER N AN May 15,1986 v.cc emesioc,
NucLcAn ENcmov U. 5. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION:
Dr. Thomas E. Murley ?
Regional Administrator
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos.30-317 (k 30-313 IE Bulletin No. 85-03; Motor-Operated Valve Common Mode Failures During Plant Transients Due to improper Switch Settings Gentlemen:
This ref ers to IE Bulletin 85-03, item e, which requested a written report within 130 days that: (1) reports the results of item a and (2) contains the plan to accomplish Items b through d of the bulletin, including a schedule for completion of those items. Enclosure (1) provides our initial reply.
Should you have further questions regarding this reply, we will oe pleased to discuss them with you.
Very truly yours, b'
TO WIT:
CITY OF BALTIMORE :
Jose / A. Tiernan, being culy sworn states that he is Vice President cf the Baltimore Gas and Electric Company, a corporation of the State of Maryland; that he provides the 8
gg foregoing response for the purposes therein set forta; inat the statements mace are true g1 and correct to the best of his knowledge, information, and belief; and that he was oo authorizec to provide the response on behalf of said Corporation.
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ENCLOSURE 1 f
NRC REQUEST Within 180 days of the date of this bulletin, submit a written report to the NRC that: (1) reports the results of item a, and (2) contains the program to accomplish items b through d of the bulletin, including a schedule for completion of these items.
ITEM a Review and document the design basis for the operation of each valve. This documentation should include the maximum differential pressure expected valve for ' oth normal and abnormal during both opening and,closmg the u
events to the extent that'these valve operations and events are included in the existing, approved design basis, (i.e., the design basis documented in pertinent licensee subinittals such as FSAR analyses and fully-approved operating and einergency procedures, etc.). When determining the maximum differential pressure, those single equipment failures and inadvertent equipment operations (such as inadvertent valve closures or openings) that are within the plant design basis should be assumed.
BG&E RESPONSE TO ITEM e (1)
This is a partial response to NRC Request (1). Tne results are presented below.
The valves listed were selected as a result of a telephone conversation held with Mr. R. J. Kiessel of your staff on Decem er 11,1955. Of the systems identified in the bulletin, only our High Pressure Safety Injection (HPSI) System motor-operated valves (MOVs) are subject to the concerns express therein.
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ENCLOSURE (1)
Calvert Cliffs Units 1 and 2 Data Summary Format Design Valve BasisAP Valve Valve Operator Function Open/Close Component 10, Manuf acturer, Manuf acturer, Model, (e.g. 5FW Motor llPM, Gear llatio pump discharge)
In psi Type, Model, Size, Rating _.
M OV-655/ Velan/Ga t e/ P34658/4"/900 #
Lim./SMB-00-25/1700/M.2:1 HPSI Pump Downstream 1313/1313 M OV-653/ Velan/G a te/ P 34658/4"/900 #
Lim./SMB-00-25/1700/36.2:1 Isolation Valves 1313/1313 MOV-654 / Velan/Ga te/ P34653/6"/900 #
Lim./SMB-0-40/1700/35.4:1 HPSI Train 1313/1313 M OV-656/ Velan/ G a te/ P 34658 / 6"/1500 #
Lim./SMB-1-60/1720*/35.4:1 Isolation Valves 1313/1313 M OV-616/ Velan/G looc/ P 34657/ 2"/1500 #
Lim./SMB-00-25/1700/38.6:1 HGSILoop 1295/1295 MOV-617/ Velan/ G lobe / P 34657 / 2"/1500 #
Lim./SMB-00-25/1700/38.6:1 Isolation Valves 1295/1295 1295/1295 M O V -626/ Velan/G lobe / P 34657/ 2"/1500 #
Lim./SMB-00-25/1700/38.6:1 1295/1295 M OV-627/ Velan/G lobe / P 34657 / 2"/1500 #
Lim./SMB-00-25/1700/38.6:1 MOV -636/ Velan/G lobc/ P 34657 / 2"/1500 #
Lim./SMB-00-25/1700/38.6:1 1295/1295 1295/1295 M O V-637 / Velan/ G lobe / P 34657 / 2"/1500 it Lim./SMB-00-25/1700/38.6:1 1294/1294 MO V-646/ Velan/G looe/ P 34657 / 2"/1500 #
Lim./SMB-00-25/1700/38.6:1 a
1294/1294 M O V - 647/ Velan/C lobe / P 34657 / 2"/ I 500 #
Lim./SMB-00-25/1700/38.6:1
- Motor itPM for Unit 2. Unit 1 RPM is unavailable at this time.
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V ENCLOSURE (1) 4-BG&E RESPONSE TO ITEM e (2)
A multi-discipline task force was formed to manage the program specified in IEB 85-03. This task force developed the following plan and schedule to accomplish each action item.
ACTION PLAN Action Item Scheduled Completion Date Review and document design basis for 05/08/S6 a.
the operation of appropripte HPSI MOVs.
Calculate maximum dif ferential pressure for each valve.
b.
Obtain latest calculational procedure for 06/01/86 determining required thrust / torque. Acquire all necessary valve information to carry out calculations. Calculate thrust and torque estimates for each MOV.
Obtain recommended torque and torque bypass 07/15/86 switch settings from valve vendor based on calculations of torque.
Review applicable valve data sheets using 08/15/86 c.
recommended switch settings. Revise data sheets if necessary.
Develop Engineering Test Procedures (ETPs) 10/01/86 for testing valve at maximum differential pressure and for resetting switches (if required).
Test Unit i HPSI MOVs in accordance with 12/01/86 bulletin and reset switches if required.
Test Unit 2 HPSI MOVs in accordance with 06/01/87 bulletin and reset switches il required.
d.
Review and revise functional test and 07/01/87 maintenance procedures to ensure that correct switch settings are determined and maintained.
Utilize appropriate industry recommendations.