ML18096A095
| ML18096A095 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 03/04/1991 |
| From: | Stone J Office of Nuclear Reactor Regulation |
| To: | Miltenberger S Public Service Enterprise Group |
| References | |
| NUDOCS 9107030321 | |
| Download: ML18096A095 (6) | |
Text
I UNITED STATES e
N CLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Docket Nos. 50-272 and 50-311 Mr. Steven E. Miltenberger March 4, 1991 Vice President and Chief Nuclear Officer Public Service Electric and Gas Company Post Office Box 236 Hancocks Bridge, New Jersey 08038
Dear Mr. Miltenberger:
SUBJECT:
DELETION OF THE AXIAL FLUX DIFFERENCE MONITOR SECOND ALARM, SALEM NUCLEAR GENERATING STATION, UNITS 1 AND 2 (TAC NOS. 79405 AND 79406)
By letter dated January 3, 1991 and supplemented by letter dated February 7, 1991, Public Service Electric and Gas Company (PSE&G) submitted a proposed change to the Salem 1 and 2 Technical Specification Bases, Section 3/4.2.1, to remove the reference to a second axial flux difference (AFD) monitor alarm.
This alarm is associated with the AFD time counters and was designed to initiate an alarm when the AFD accumulated time penalty exceeded 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> in any 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> time period.
The change is being requested because the AFD second alarm has not performed as designed.
Upon receipt of the first AFD alarm, the operators monitor and record the time the AFD is outside. the limits a~ specified in Technical Specification Surveillance 4.2.1.1. The Technical Specification requirements are met by manually tracking the accumulated time penalty, as detailed in the February 7, 1991 letter, without reliance on the AFD 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> alarm feature.
The ACTION of Technical Specification 3.2.1 is then taken based on the manual tracking of the accumulated time penalty.
The staff offers no objection to your proposal to delete the AFD monitor second alarm and to manually track the accumulated time penalty. Enclosed is a copy
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Mr. Steven March 4, 1991 of the revised Bases page B 3/4 2-2 for Salem 1 and page B 3/4 2-2 for Salem
- 2. All staff activities related to TAC Nos. 79405 and 79406 are considered complete.
Enclosure:
Revised Technical Specification Pages cc w/enclosure:
See next page Sincerely,
~(~
James C. Stone, ProJect Manager Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
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Hr. Steven E. Miltenberger
- 'l -
March 4, 1991 of the revised Bases page B 3/4 2-2 for Salem 1 and page B 3/4 2-2 for Salem
- 2. All staff activities related to TAC Nos. 79405 and 79406 are considered complete.
Enclosure:
Revised Technical Specification Pages cc w/enclosure:
See next page DISTRIBUTION:
Docket Fne NRC & Local PDR PDI-2 Reading SVarga EGreenman WButler MO'Brien(3)
JStone*
OGC DHagan, 3206 f.Hi 11( 8)
Wanda Jones, Pl-37 JCa1vo GPA/PA OC/LFMB RJones SNewberry ACRS(lO)
RBlough, RGN-I JWhite, RGN-I OF I Document Name:
TAC NOS 79405/406 Sincerely, IS/
James C. Stone, Project Manager Project Directorate 1-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation ones
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~~ii5i9i------~-i:i;ii9i _____ _
Mr. Steven E. Miltenberger Public Service Electric & Gas Company cc:
Mark J. Wetterhahn, Esquire Bishop, Cook~ Purcell & Reynolds 1400 L. Street NW Washington, DC 20005-3502 Richard Fryling, Jr., Esquire Law Department - Tower SE 80 Park Place Newark, NJ 07101 Mr. s. LaBruna General Manager - Salem Operations Salem Generating Station P.O. Box 236 Hancocks Bridge, NJ CE038 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 Sal~m Generating Statio~
U.S. Nuclear Regulatory Co11111ission Drawer I Hancocks Bridge, NJ 08038 Dr. Jill Lipoti, Asst. Director Radiation Protection Programs NJ Department of Environmental Protection CN 415 Trenton, NJ 08625-0415 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, Col'llTlission Department of Public Utilities State of New Jersey 101 Collillerce Street Newark, NJ 07102 Regional Administrator, Region I U. S. Nuclear Regulatory Col'llTlission 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 Hr. 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 Atlantic 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 Conn1ss1on of Maryland Engineering Division ATTN:
Chief Engineer
- 231 E. Baltimore Street Baltimore, MD 21202-3486
POWER DISTBIBUTION LIMITS BASES Although it is intended that the plant will be operated with the AXIAL FLUX DIFFERENCE within the +6, -9\\ target band about the target flux difference, during rapid plant THERMAL POWER reductions, control rod motion will cause the AFD to deviate outside of the target band at reduced THERMAL POWER levels. This deviation will not affect the xenon redistribution sufficiently to change the envelope of peaking factors which may be reached on a subsequent return to RATED THERMAL POWER (with the AFD within the target band) provided the time duration of the deviation ia limited. Accordingly, a l hour penalty deviation limit cumulative during the previous 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is provided for operation outside of the target band but within the limits of Figure 3.2-1 while at THERMAL POWER levels between SO\\ and 90\\ of RATED THERMAL POWER. For THERMAL POWER levels between lS\\ and SO\\ of rated THERMAL POWER, deviations of the AFD outside of the target band are less significant.
The penalty of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> actual time reflects this reduced significance~
Provisions for monitoring the AFD are derived from the plant nuclear instrumentation system through the AFD Monitor Alarm. A control room recorder continuously displays the auctioneered high flux difference and the target band limits as a function of power level. An alarm is received any time the auctioneered high flux difference exceeds the target band limits. Time outside the target band is graphically presented on the strip chart.
Figure B 3/4 2-1 shows a typical monthly target band.
SALEM - UNIT l B 3/4 2-2 Revised by NRC letter dated 03/04/91
I 1
ll POWER DISTBIBQTION LIMITS BASES Although it i* intended that the plant will be operated with the AXIAL FLUX DIFFERENCE within the +6, -9% target band about the target flux difference, during rapid plant THERMAL POWER reductions, control rod motion will cause the AFC to deviate outside of the target band at reduced THERMAL POWER levels. This deviation will not affect the xenon redistribution sufficiently to change the envelope of peaking factors which may be reached on a subsequent return to RATED THERMAL POWER (with the AFC within the target band) provided the time duration of the deviation is limited. Accordingly, a l hour penalty deviation limit cumulative during the previous 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is provided for operation outside of the target band but within the limits of Figure 3.2-1 while at THERMAL POWER levels between 50\\ and 90\\ of RATED THERMAL POWER. For THERMAL POWER levels between 15% and 50\\ of rated THERMAL POWER, deviations of the AFD outside of the target band are leas significant.
The penalty of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> actual time reflects this reduced significance.
Provisions for monitoring the AFD are derived from.the plant nuclear instrumentation system through the AFD Monitor Alarm. A control room recorder continuously displays the auctioneered high flux difference and the target band limits as a function of power level. An alarm is received any time tha auctioneered high flux difference exceeds the tar~et band limits. Time outside the target band is graphically presented on the atrip chart.
Figure B 3/4 2-1 shows a typical monthly target band.
SALEM -
UNIT 2 B 3/4 2-2 Revised by NRC letter dated 03/04/91