ML20151X029
| ML20151X029 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 09/14/1998 |
| From: | Wang A NRC (Affiliation Not Assigned) |
| To: | Olivier L BOSTON EDISON CO. |
| References | |
| GL-96-05, GL-96-5, TAC-M97086, NUDOCS 9809160230 | |
| Download: ML20151X029 (4) | |
Text
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September 14, 1998 Mr. Leon J. Oliviar Vice President - Nuclear / Station Director Boston Edison Company Pilgrim Nuclear Power Station RFD #1 Rocky Hill Road Plymouth, MA 02360
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING GENERIC LETTER 96-05 PROGRAM AT PILGRIM NUCLEAR POWER STATION (TAC NO. M97086)
Dear Mr. Olivier.
On September 18,1996, the NRC issued Generic Letter (GL) 96-05, " Periodic Verification of Design Basis Capability of Safety-Related Motor-Operated Valves," to request that nuclear power plant licensees establish a program, or ensure the effectiveness of the current program, to verify on a periodic basis that safety-related motor-operated valves (MOVs) continue to be capable of performing their safety functions within the current licensing basis of the facility.
On June 26,1998, Boston Edison Company (BECo/ licensee) submitted for the Pilgrim Nuclear
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Power Station an updated response to GL 96-05 indicating its intent to implement the provisions of a Joint Owners Group (JOG) Program on MOV Periodic Verification. The NRC staff has encouraged licensees to participate in the industry-wide JOG program to provide a benefit in reactor safety by sharing expertise and information on MOV performance and to increase the efficiency of GL 96-05 activities at nuclear plants. BECo's participation in the JOG program has minimized the amount of information necessary for the NRC staff to review the licensee's response to GL 96-05. As a result, the NRC staff requires only limited information to complete its GL 96-05 review for Pilgrim. Enclosed is the staff's Request for Additional Information. We request that you respond within 60 days of receipt of this letter.
Questions regarding this request should be sent to my attention at the above address; or, you can contact me at (301) 415-1445.
Sincerely, t
Original signed by Alan B. Wang, Project Manager Project Directorate 1-3 Division of Reactor Projects - 1/ll Office of Nuclear Reactor Regulation Docket No. 50-293
Enclosure:
Request for Additional I" " " "
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Mr. Leon J. Olivier Boston Edison Company Pilgrim Nuclear Power Station cc:
Mr. Ron Ledgett Ms. Nancy Desmond Executive Vice President Manager, Reg. Affairs Dept.
800 Boyleston Street Pilgrim Nuclear Power Station Boston, MA 02199 RFD #1 Rocky Hill Road Plymouth, MA 02360 Resident inspector U. S. Nuclear Regulatory Commission Mr. David F. Tarantino Pilgrim Nuclear Power Station Nuclear Information Manager Post Office Box 867 Pilgrim Nuclear Power Station Plymouth, MA 02360 RFD #1, Rocky Hill Road Plymouth, MA 02360 Chalmtan, Board of Selectmen 11 Lincoln Street Ms. Kathleen M. O'Toole Plymouth, MA 02360 Secretary of Public Safety Executive Office of Public Safety Chairman, Duxbury Board of Selectmen One Ashburton Place Town Hall Boston, MA 02108 878 Tremont Street Duxbury, MA 02332 Mr. Peter LaPorte, Director Attn: James Muckerheide Office of the Commissioner Massachusetts Emergency Management Massachusetts Department of Agency Environmental Protection 400 Worcester Road One Winter Street P.O. Box 1496 Boston, MA 02108 Framingham, MA 01701-0317 i
Office of the Attomey General Chairman, Citizens Urging One Ashburton Place Responsible Energy 20th Floor P.O. Box 2621 Boston, MA 02108 Duxbury, MA 02331 Mr. Robert M. Hallisey, Director Citizens at Risk Radiation Control Program P.O. Box 3803 Massachusetts Department of Plymouth, MA 02361 Public Health 305 South Street W.S. Stowe, Esquire Boston, MA 02130 Boston Edison Company 800 Boyleston St.,36th Floor Regional Administrator, Region i Boston, MA 02199 U. S. Nuclear Regulatory Commission 475 Allendale Road Chairman King of Prussia, PA 19406 Nuclear Matters Committee Town Hall Ms. Jane Fleming 11 Lincoln Street 8 Oceanwood Drive Plymouth, MA 02360 Duxbury, MA 0233 Mr. William D. Meinert Mr. Jeffery Keene Nuclear Engineer Licensing Division Manager Massachusetts Municipal Wholesale Boston Edison Company Electric Company 600 Rocky Hill Road P.O. Box 426 Plymouth, MA 02360-5599 Ludlow, MA 01056-0426
0 REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSEE RESPONSE TO GENERIC LETTER (GL) 96-05 AT PILGRIM NUCLEAR POWER STATION (TAC NO. M97086) 1.
In NRC Inspection Report No. 50-293/97-13, the NRC staff closed its review of the motor-operated valve (MOV) program implemented at the Pilgrim Nuclear Power Station in response to Generic Letter (GL) 89-10, " Safety-Related Motor-Operated Valve Testing and Surveillance." In the inspection report, the NRC staff noted certain aspects of the l
licensee's MOV program that would be addressed over the long term. For example, the l
licensee indicated that it (1) would obtain additional industry information or use the Electric Power Research Institute (EPRI) MOV Performance Prediction Methodology (PPM) to bolster the assumed valve factors for several MOVs (including specific marginal MOVs);
4 (2) would complete its draft calculation M-772, " Evaluation of MOV Coefficient of Friction,"
in support of its stem friction coefficient assumptions; and (3) had not completed the revision of certain MOV design calculations. In the report, the inspectors noted that the licensee's assumptions for the design basis differential pressure for the recirculation pump suction and discharge isolation valves and associated valve factors needed clarification.
The inspectors also indicated that more information was needed to validate the vendor's predicted torque requirements for two motor-operated butterfly valves in the Reactor Building Closed Cooling Water System. The licensee stated in a letter dated June 26, 1998, that it is evaluating the capability of a number of MOVs using the EPRI MOV PPM and that it would notify the NRC of the results of those evaluations by November 15,1998.
The licensee should describe the actions taken to address the specific long-term aspects of the MOV program at Pilgrim that were noted in the NRC inspection report.
2.
In a letter dated June 26,1998, the licensee updated its commitment to implement the l
Joint Owners Group (JOG) Program on MOV Periodic Verification in response to GL 96-05. The JOG program specifies that the methodology and discrimination criteria for ranking MOVs according to their safety significance are the responsibility of each participating licensee. In a previous letter dated June 18,1997, the licensee had generally described the risk ranking of MOVs at Pilgrim for application of the JOG program. As i
Pilgrim is a boiling water reactor (BWR) nuclear plant, is the licer.see applying the Boiling l
Water Reactor Owners' Group (BWROG) methodology for ranking MOVs based on their safety significance as described in BWROG Topical Report NEDC 32264 and the NRC l
safety evaluation dated February 27,19967 If not, the licensee should describe the methodology used for risk ranking MOVs at Pilgrim in more detail.
3.
The JOG program focuses on the potential age-related increase in the thrust or torque required to operate valves under their design-basis conditions. In the NRC safety evaluation dated October 30,1997, on the JOG program, the ' 1C staff specified that licensees are responsible for addressing the thrust or torque delivered by the MOV motor actuator and its potential degradation. In NRC Inspection Report 97-13, the inspectors noted that, at Pilgrim, the licensee had already responded to the potentially adverse l
industry information regarding MOV performance identified in NRC Information Notice 96-48 (August 21,1996), " Motor-Operated Valve Performance issues." For example, the licensee's methods of calculating Limitorque valve actuator capability included the use of l
Enclosure i
2-(1) actuator pullout efficiencies in both stroke directions; (2) a 0.9 application factor for attemating current motors; and (3) an exponent of 2.2 to calculate degraded voltage factors for attemating current motors. The licensee should briefly describe the plan at Pilgrim for ensuring adequate MOV motor actuator output capability, including consideration of any impact on the Pilgrim MOV
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program resulting from the recent guidance in Limitorque Technical Update 98-01 and its Supplement 1.
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