ML20206A151
| ML20206A151 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 04/20/1999 |
| From: | Thadani M NRC (Affiliation Not Assigned) |
| To: | Geoffrey Edwards PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| GL-96-05, GL-96-5, TAC-M97083, TAC-M97084, NUDOCS 9904280077 | |
| Download: ML20206A151 (5) | |
Text
' Mr. Ganott D. Edwards
' April 20,1999 Director-Licensing, MC 62A-1
'. PECO Energy Company Nuclear Group Headquarters
- Correspondence Control Desk P.O. Box No.195 -
Wayne, PA 19085-0195
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING GENERIC LETTER 96-05 PROGRAM AT PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 (TAC NOS. M97083 AND M97084)
Dear Mr. Edwards:
On September 18,1996, the Nuclear Regulatory Commission (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 periode basis that safety-related moter-operated valves (MOVs) continue to be capable of performing their safety functiona dthin the current licensing basis of the facility.
On May 14,1998, PECO Energy Company (licensee of Peach Bottom Atomic Power Station, Units 2 and 3) submitted an updated response to GL 96-05 indicating its intent to implemr'.
the provisions of a Joint Owners Group (JOG) Program on MOV Penodic Verification at Peach Bottom. 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.
Licensee participation in the JCG program also minimizes the amount of information necessary for the NRC staff to review each licensee's response to GL 96-05. However, the NRC staff finds that additional information requested in the enclosure is required to complete its GL 96-05 review for Peach Bottom l
A draft of the enclosed request was sent to John Hufnagel of your staff by facsimile. As 1l agreed during subsequent telephone conversation with Dave Neff of your staff on March 16, 1999, the licensee's response is requested within 90 days from the receipt of this letter.
)
Sincerely,
!n Mohan C. Thadani, Senior Project Manager Isl i
9904280077 990420 i
Project Directorate I DR ADOCK 0 7
p Division of Licensing Project Management
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Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 278 1
Enclosure:
Request for Additionalinformation bb EE EN cc w/ encl: See next page
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'I wAswiwoTow, o.c. seeswooi April 20,1999 Mr. Garrett D. Edwards Director-Licensing, MC 62A-1 PECO Energy Company Nuclear Group Headquarters Correspondence Control Desk P.O. Box No. 195 '
Wayne, PA 19085-0195
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING GENERIC LETTER 96-05 PROGRAM AT PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 (TAC NOS. M97083 AND M97084)
Dear Mr. Edwards:
On September 18,1996, the Nuclear Regulatory Commission (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 May 14,1998, PECO Energy Company (licensee of Peach Bottom Atomic Power Station, Units 2 and 3) submitted 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 at Peach Bottom. 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.
~ Licensee participation in the JOG program also minimizes the amount of information necessary for the NRC staff to review each licensee's response to GL 96-05. However, the NRC staff finds that additional information requested in the enclosure is required to complete its GL 96-05 review for Peach Bottom.
A draft of the enclosed request was sent to John Hufnagel of your staff by facsimile. As agreed during subsequent telephone conversation with Dave Neff of your staff on March 16, i
1999, the licensee's response is requested within 90 days from the receipt of this letter.
Sincerely, Mohan C. Thadani, Senior Project Manager, Section 2 Project Directorate l Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 278
Enclosure:
Request for AdditionalInformation cc w/ encl: See next page
a f
Peach Bottom Atomic Power Station, Units 2 and 3 cc*
J. W. Durham, Sr., Esquire.
Chief-Division of Nuclear Safety Sr. V.P. & Gens Y Counsel PA Dept. of PECO Energy Company Environmental Resources 2301 Market Street, S261 P.O. Box 8469 Philadelphia, PA 19101 Harrisburg, PA 17105-8469 PECO Energy Company Board of Supervisors ATTN: Mr. J. Doering, Vice President Peach Bottom Township Peach Bottom Atomic Power Station R.D. #1 1848 Lay Road Delta, PA 17314 Dolta, PA 17314 Public Service Commission of Maryland PECO Energy Company Engineering Division
]
ATTN: Regulatory Engineer, A4-5S Chief Enginaer Peach Bottom Atomic Power Station 6 St. Paul Centre j
1848 Lay Road Baltimore, MD 21202-6806 Delta, PA 17314 j
Mr. Richard McLean Resident inspector Power Plant and Environmental U.S. Nuclear Regulatory Commission Review Division i
Peach Bottom Atomic Power Station Department of Natural Resources P.O. Box 399 B-3, Tawes State Office Building Delta, PA 17314 Annapolis, MD 21404 Regional Administrator, Region i Dr. Judith Johnsrud U.S. Nuclear Regulatcy Commission National Energy Committee 475 Allendale Road Sierra Club King of Prussia, PA 19406 433 Orlando Avenue State College, PA 16803 Mr. Roland Fletcher i
Department of Environment Manager-Financial Control A Co-Owner 201 West Preston Street Affairs Baltimore, MD 21201 Public Service Electric and Gas Comceny I
A.F. Kirby, lil P.O. Box 236 Extemal Operation - Nuclear Hancocks Bridge, NJ 08038-0236 i
Delmarva Power & Light Company P.O. Box 231 Manager-Peach Bottom Ucensing
'Wilmington, DE 19899 PECO Energy Company Nuclear Group Headquarters PFCO Energy Company Correspondence Control Desk Pimt Manager P.O. Box No.195 Peach Bottom Atomic Power Station Wayne, PA 19087-0195 1848 Lay Road Delta, PA 17314
i REQUEST FOR ADDITIONAL INFORMATION ON RESPONSE OF PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 TO GENERIC LETTER 96-05 1.
In NRC inspection Report No. 50-277 & 278/97-07, the Nuclear Regulatory Commission 'NRC) staff closed its review of the motor-operated valve (MOV) program implemented at the Peach Bottom Atomic Power Station (Peach Bottom) in response to Generic Letter (GL) 89-10, " Safety-Related Motor-Operated Valve Testing and Surveillance." in the inspection report, the NRC staff discussed aspects of the licensee's MOV program to be addressed over the long term, including the licensee's plans to implement a margin improvement program to increase the thrust capability of more than 30 MOVs. The licensee should describe the actions taken to address this long-term aspect of the MOV program at Peach Bottom that was noted in the NRC inspection report.
2.
In GL 96-05, the NRC staff discussed the scope of the program with respect to safety-related MOVs that are assumed to be capable of retuming to their safety position when placed in a position that prevents their safety system (or train) from performing its safety function; and the system (or train) is not declared inoperable when the MOVs are in their nonsafety position in a letter dated March 14,1997, the licensee indicated that such MOVs are not included in the GL 96-05 program at Peach Bottom, but that operability is demonstrated through routine plant eperation. However, NRC Inspection Report No. 50-277 & 278/97-07, dated December 16,1997, noted that (1) the licensee had revised Peach Bottom's GL 89-10 program scope to include 12 of the 16 MOVs that were originally considered to have a passive safety function; and (2) the systems / trains associated with the remaining four MOVs are declared laoperable when they are out of their safety positions in accordance with the plant Technical Specifications. Therefore, the licensee should clarify its position by identifying if the referenced 12 MOVs are included in the Peach Bottom GL 96-05 program scope. If not, the licensee should address its plans for maintaining torque switch settings and the feedback of industry operating experience and data. Further, the Peach Bottom licensee should discuss the manner in which its approach will provide confidence that these MOVs will be capable of retuming to their safety position, including (1) plans for performing required switch setting adjustments promptly, (2) any specifed MOV operation under dynamic conditions, or (3) any future diagnostic testing. The Peach Bottom licensee should describe the bases for its confidence that (1) these MOVs will continue to be capable of retuming to their safety position, (2) any degradation in MOV performance will be identified prior to causing the MOVs to be incapable of retuming to their safety position, and (3) any action necessary to ensure MOV capability will be taken in a timely manner.
3.
In a letter dated May 14,1998, the licensee updated its commitment to implement the Joint Owners Group (JOG) Program on MOV Periodic Verifmation 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 March 14,1997, the licensee had generally described the risk ranking of MOVs at Peach Bottom for application of the ENCLOSURE
~.
s e
J interim MOV static diagnostic test program. As Peach Bottom is a boiling water reactor (BWR) nuclear plant, is the licensee applying the Boiling Water Reactor Owners' Group j
(BWROG) methodology for ranking MOVs based on their safety significance as i
described in BWROG Topical Report NEDC 32264 and the NRC safety evaluation
{
dated February 27,19967 If not, the licensee should describe the methodology used for risk ranking MOVs at Peach Bottom in more detail.
4.
The JOG program focuses on the potential age-related increase in the thrust or torque i
required to operate valves under their design-basis conditions. In the NRC safety evaluation dated October 30,1997, on the JOG program, the NRC staff specified that licensees are responsible for addressing the thrust or torque delivered by the MOV motor actuator and its potential degradation..The licensee should describe the plan at Peach Bottom for ensuring adequate ac and dc MOV motor actuator output capability, including consideration of recent guidance in Limitorque Technical Update 98-01 and
)
its Supplement 1.
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