ML18106A865
| ML18106A865 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 09/10/1998 |
| From: | Milano P NRC (Affiliation Not Assigned) |
| To: | Keiser H Public Service Enterprise Group |
| References | |
| TAC-M98259, TAC-M98260, NUDOCS 9809150305 | |
| Download: ML18106A865 (4) | |
Text
Mr. Harold W. Keiser Chief Nuclear Officer & President -
Nuclear Business Unit Public Service Electric & Gas Company Post Office Box 236 Hancocks Bridge, NJ 08038 September 10,.8
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING TESTING OF ACCUMULATOR CHECK VALVES, SALEM NUCLEAR GENERATING STATION, UNIT NOS. 1 & 2 (TAC NOS. M98259 AND M98260)
Dear Mr. Keiser:
In a letter dated December 26, 1996, the Public Service Electric and Gas Company (PSE&G, the licensee) submitted a request for relief from certain requirements for the inservice testing of the safety injection accumulator discharge check valves. In a letter dated March 2, 1997, the U.S.
Nuclear Regulatory Commission (NRC) granted interim relief to PSE&G for the current operating cycles to allow the NRC staff to conduct a more thorough review.
The NRC staff is reviewing your submittal and has determined that additional information is required to complete its review. The specific information requested is addressed in the enclosure. In a telephone conversation with representatives of your staff, the NRC staff discussed this information and obtained agreement that PSE&G would provide the additional information requested within 45 days of receipt of this letter.
If you have any questions regarding this matter, please contact me at (301) 415-1457.
Docket Nos. 50-272 and 50-311 Sincerely, R. Ennis /sf for Patrick D. Milano, Senior Project Manager Project Directorate 1-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
Request for Additional Information cc: See next page DISTRIBUTION:
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DATE 9 !<=\\ /98 I q /98 OFFICIAL RECORD COPY DOCUMENT NAME: SA98259.RAI
--~---- ---------
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555--0001 Mr. Harold W. Keiser Chief Nuclear Officer & President -.
Nuclear Business Unit Public Service Electric & Gas Company Post Office Box 236 Hancocks Bridge, NJ 08038 September 10, 1998
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING TESTING OF ACCUMULATOR CHECK VALVES, SALEM NUCLEAR GENERATING STATION, UNIT NOS. 1 & 2 (TAC NOS. M98259 AND M98260)
Dear Mr. Keiser:
In a letter dated December 26, 1996, the Public Service Electric and Gas Company (PSE&G, the licensee) submitted a request for relief from certain requirements for the inservice testing of the safety injection accumulator discharge check valves. In a letter dated March 2, 1997, the U.S.
Nuclear Regulatory Commission (NRC) granted interim relief to PSE&G for the current operating cycles to allow the NRC staff to conduct a more thorough review.
The NRC staff is reviewing your submittal and has determined that additional information is required to complete its review. The specific information requested is addressed in the enclosure. In a telephone conversation with representatives of your staff, the NRC staff discussed this information and obtained agreement that PSE&G would provide the additional information requested within 45 days of receipt of this letter.
If you have any questions regarding this matter, please contact me at (301) 415-1457.
Docket Nos. 50-272 and 50-311
Enclosure:
Request for Additional
- Information cc: See next page Sincerely,
-m~
~
Patrick D. Milano, Senior Project Manager Project Directorate 1-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
)
Mr. Harold W. Keiser Public Service Electric & Gas Company cc:
Jeffrie J. Keenan, Esquire Nuclear Business Unit - N21 P.O. Box 236 Hancocks Bridge, NJ 08038 General Manager - Salem Operations Salem Nuclear Generating* Station P.O. Box 236 Hancocks Bridge, NJ 08038 Mr. Louis Storz Sr. Vice President - Nuclear Operations Nuclear Department P.O. Box 236 Hancocks Bridge, NJ 08038 Senior Resident Inspector Salem Nuclear Generating Station U.S. Nuclear Regulatory Commission Drawer 0509 Hancocks Bridge, NJ 08038 Dr. Jill Lipoti, Asst. Director Radiation Protection Programs NJ Department of Environmental Protection and Energy CN 415 Trenton, NJ 08625-0415 Maryland Office of People's Counsel 6 St. Paul Street, 21st Floor Suite 2102 Baltimore, MD 21202 Ms. R. A. Kankus Joint Owner Affairs PECO Energy Company 965 Chesterbrook Blvd., 63C-5 Wayne, PA 19087 Mr. Elbert Simpson Senior Vice President-Nuclear Engineering Nuclear Department P.O. Box 236 Hancocks Bridge, NJ 08038 Salem Nuclear Generating Station, Units 1 and 2 Richard Hartung Electric Service Evaluation Board of Regulatory Commissioners 2 Gateway Center, Tenth Floor Newark, NJ 07102 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Lower Alloways Creek Township c/o Mary O. Henderson, Clerk Municipal Building, P.O. Box 157 Hancocks Bridge, NJ 08038 Director - Licensing Regulation & Fuels Nuclear Busienss Unit - N21 P.O. Box 236 Hancocks Bridge, NJ 08038 Mr. David Wersan Assistant Consumer Advocate Office of Consumer Advocate 1425 Strawberry Square Harrisburg, PA 17120 Manager - Joint Generation Atlantic Energy 6801 Black Horse Pike Egg Harbor Twp., NJ 08234-4130 Carl D. Schaefer External Operations - Nuclear Delmarva Power & Light Company P.O. Box 231 Wilmington, DE 19899 Public Service Commission of Maryland Engineering Division Chief Engineer 6 St. Paul Centre Baltimore, MD 21202-6806
J REQUEST FOR ADDITIONAL INFORMATION INSERVICE TESTING OF ACCUMULATOR CHECK VALVES SALEM NUCLEAR GENERATING STATION,. UNITS 1AND2 On sheet 12 of Attachment 1 to the December"26, 1996, letter, PSE&G references Equation 3-1 from EPRI Report NP-5479, "Application Guidelines for Check Valves in Nuclear Power Plants,"
dated January of 1988. Equation 3-1 is the minimum flow velocity CVmin) to cause full disk lift in a swing check valve. On page 0-5 of the EPRI report, there is a discussion of the disk shielding effect in the Clearway check valve body design. The guide states that if the disk does not protrude in the flow path, then it is expected that a significantly higher flow velocity will be required to achieve full disk opening than predicted by equation 3-1. Since the accumulator discharge check valves do not employ disk stops and experience the disk shielding effect, PSE&G uses a flow test to verify that the valve disk is free to move to the safety position.
- 1.
Provide the percent or degree of valve disk swing to attain the safety position for these valves.
- 2.
Describe PSE&G's rationale for concluding that the V min equation is valid for the analysis of the accumulator check valves.
For the flow test, PSE&G calculated a minimum pressure decay tinie of 24 seconds, then added 15 percent margin to this number to.arrive at the acceptance criteria of 27.5 seconds. It appears that this factor was added to account for some variation in the test condtions and data collection methods.
- 3.
Describe the basis for the selection of this margin along with a confirmation that the valve disk will attain the safety position at the limits of the acceptance margin. Also, discuss the effect of instrument inaccuracy on the test acceptance criteria.
Enclosure