ML18094B394
| ML18094B394 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 04/05/1990 |
| From: | Boger B Office of Nuclear Reactor Regulation |
| To: | Miltenberger S Public Service Enterprise Group |
| References | |
| TAC-76414, NUDOCS 9004160253 | |
| Download: ML18094B394 (5) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Mr. Steven E. Miltenberger Vice President and Chief Nuclear Officer Public Service Electric and Gas Company Post Office Box 236 Hancocks Bridge, New Jersey 08038
Dear Mr. Miltenberger:
April 5, 1990
SUBJECT:
TEMPORARY WAIVER OF COMPLIANCE RELATING TO MAIN STEAM ISOLATION VALVE CLOSURE TIME (TAC NO. 76414)
RE:
SALEM GENERATING STATION, UNIT 1 On April 4, 1990, Public Service Electric and Gas Co. requested a change to the Technical Specifications for Salem on an emergency basis.
The requested change would increase the allowable main steam isolation valve (MSIV) closure time from 5 seconds to 8 seconds.
In October, 1989, the Salem Unit 2 MSIVs were stroke tested during a controlled shutdown for maintenance.
Three out of four of the valves failed to close within the allowable time of five seconds specified by the surveillance requirement.
Although the MSIVs were successfully stroke tested following maintenance to the hydraulic system, the root cause was not conclusively identified.
Following the October 1989 slow closure event, PSE&G contracted with Westinghouse to evaluate the effects of an increase in MSIV closure time.
During December, 1989, testing performed at another nuclear utility with similar MSIVs identified water accumulation as a root cause of slow valve closures.
In order to determine whether a water accumulation problem existed in the valves at Salem, a special test was performed during the first planned shutdown subsequent to October, 1989.
These tests were performed at Salem, Unit 2 on March 31, 1990.
The results were similar to those of the October, 1989, test and confirmed that water accumulation is adversely affecting MSIV closure time.
Three out of four MS!Vs closed between five and eight seconds after extended power operation.
The affected valves all closed in less than five seconds when retested.
Salem Unit 1 is currently restarting from a forced outage and will be stroke testing the MSIVs at conditions that more closely replicate the conditions seen by the valve during normal power operation.
Based on the results of the testing done for Unit 2 on March 31, 1990, stroke times between 5 and 8 seconds are expected.
In order to repair and reopen the valve, the unit would have to return to Mode 4.
This will delay restart of Unit 1.
\\
Mr. Steven Westinghouse reanalyzed the limiting case accident scenarios associated with MSIV closure times assuming a total ESF response time of 12 seconds.
- However, the requested change is based on a total ESF response time of 10 seconds, 2 seconds for instrument response and 8 seconds for valve stroke time.
It was concluded that the longer closure time does not result in an adverse effect on the Salem 1 licensing basis.
The scenarios that were reviewed were:
- 1.
Steam Line Break Core Response
- 2.
Steam Line Break Mass and Energy Release Inside Containment
- 3.
Environmental Qualification of Equipment Inside Containment
- 4.
Steam Line Break Mass and Energy Release Outside Containment
- 5.
Feedline Break
- 6.
Steam Generator Tube Rupture
- 7.
Small and Large Break LOCA
- 8.
LOCA Slowdown Forces, Hot Leg Switchover to Preclude Boron Precipitation, and Post-LOCA Long Term Core Cooling Subcriticality.
The staff has completed a preliminary review of your April 4, 1990 request and finds that:
- 1.
Your basis for determining that the proposed changes involve no significant hazards consideration is acceptable.
- 2.
The proposed changes do not involve any significant irreversible environmental impacts.
- 3.
The licensing basis is not adversely affected and therefore your proposed response time changes in the Unit 1 Technical Specifications as identified below are acceptable:
- a.
Table 3.3-5; (1)
Item 5.h, Steam Line Isolation, change response time seconds from< 10.75 to< 13.75 (2) Item 6.h, Steam Line Isolation, change response time seconds from< 8.0 to< 10.0 (3) Item 7.c, Steam Line Isolation, change response time seconds from< 7.0 to< 10.0
- b.
Surveillance Requirement 4.7.1.5, change the time for full closure from within 5 seconds to within 8 seconds.
in in in
Mr. Steven Accordingly, this waiver of compliance from the requirements in Table 3.3-5 and Section 4.7.1.5 of the Salem 1 Technical Specifications is granted, subject to your adoption of the revised requirements as detailed in your April 4, 1990 submittal.
This waiver of compliance applies only to Unit 1 and will be effective as of the date of issuance.
It will expire upon completion of the staff's action on your application of April 4, 1990.
Your April 4, 1990 request included Unit 2.
Because Unit 2 is currently in a refueling outage, the proposed amendment for Unit 2 will be processed in the normal manner.
cc:
See next page Sincerely, Bruce A. Boger, Assistant Director for Region I Reactors Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Mr. Steven E. Miltenberger Public Service Electric & Gas Company cc:
~ark J. Wetterhahn, Esquire Conner and Wetterhahn Suite 1050 1747 Pennsylvania Avenue, NW Washington, DC 20006 Richard Fryling, Jr., Esquire Law Department - Tower SE 80 Park Place Newark. NJ 07101 Mr. L. K. Miller General Manager - Salem Operations Salem Generating Station P.O. Box 236 Hancocks Bridge, NJ 08038 Mr. S. LaBruna Vice President - Nuclear Operations Nuclear Department P.O. Box 236 Hancocks Bridge, New Jersey 08038 Mr. Thomas P. Johnson, Senior Resident Inspector Salem Generating Station U.S. Nuclear Regulatory Commission Drawer I Hancocks Bridge, NJ 08038 Dr. Jill Lipoti, Ph.D New Jersey Department of Environmental Protection Division of Environmental Quality Radiation Protection Programs State of New Jersey CN 415 Trenton, NJ 08625 Maryland People's Counsel American Building, 9th Floor 231 East Baltimore Street Baltimore, Maryland 21202 Mr. J. T. Robb, Director Joint Owners Affairs Philadelphia Electric Company 955 Chesterbrook Blvd., 51A-13 Wayne, PA 19087 Salem Nuclear Generating Station Richard B. McGlynn, Commission Department of Public Utilities State of New Jersey 101 Commerce Street 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 0. Henderson, Clerk Municipal Building, P.O. Box 157 Hancocks Bridge, NJ 08038 Mr. Bruce A. Preston, Manager Licensing and Regulation Nuclear Department P.O. Box 236 Hancocks Bridge, NJ 08038 Mr. David Wersan Assistant Consumer Advocate Office of Consumer Advocate 1425 Strawberry Square Harrisburg, PA 17120 Mr. Scott B. Ungerer MGR. - Joint Generation Projects
~.tlantic Electric Company P.O. Box 1500 1199 Black Horse Pike Pleasantville, NJ 08232 Mr. Jack Urban General Manager, Fuels Department Delmarva Power & Light Company 800 King Street Wilmington, DE 19899 Public Service Commission of Maryland Engineering Division ATTN:
Chief Enaineer 231 E. Baltimore Street Baltimore, MD 21202-3486
I Mr~ Steven Accordingly, this waiver of compliance from the requirements in Table 3.3-5 and Section 4.7.1.5 of the Salem 1 Technical Specifications is granted, subject to your adoption of the revised requirements as detailed in your April 4, 1990 submittal.
This waiver of compliance applies only to Unit 1 and will be effective as of the date of issuance.
.It will expire upon completi-0n of the staff 1s action on your application of April 4, 1990.
Your April 4, 1990 request included Unit 2.
Because Unit 2 is turrently in a refueling outage, the proposed amendment for Unit 2 will *be processed in the normal manner.
cc:
See next page DISTRIBUTION Docket File NRC PDR M0 1Brien (4)
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. Bruce.A. Boger, Assistant Director for Region I Reactors Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Wanda Jones JCalvo Local PDR PDI-2 Reading WButler DHagan EJordan GPA/PA ACRS (10)
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