ML18101B167

Application for Amends to Licenses DPR-70 & DPR-75, Representing Changes to Spec 3/4.8.2.5, 28-Volt DC Distribution - Operating.

ML18101B167
Person / Time
Site:	Salem
Issue date:	01/04/1996
From:	Storz L Public Service Enterprise Group
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML18101B168	List: ML18101B167 ML18101B169
References
LCR-95-15, LR-N95094, NUDOCS 9601160156
Download: ML18101B167 (7)

Text

• Public Service Electric and Gas Company Louis F. Storz Public Service Electric and Gas Company P.O. Box 236, Hancocks Bridge, NJ 08038 609-339-5700 Senior Vice President - Nutlear Operations JAN 0 4 1996 LR-N95094 LCR 95-15 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Gentlemen:

LICENSE AMENDMEN~ APPLICATION REVISION OF 28-VOLT DC SPECIFICATION SALEM GENERATING STATION UNIT NOS. 1 AND 2 FACILITY OPERATING LICENSES DPR-70 AND DPR-75 DOCKET NOS. 50-272 AND 50-311 This letter submits an application for amendment to Appendix A of Facility Operating Licenses DPR-70 and DPR-75 for Salem Generating Station Unit Nos. 1 and 2, respectively. The application for amendment is being filed in accordance with 10CFR50.90. Pursuant to the requirements of 10CFR50.91(b) (1), a copy of this request for amendment has been sent to the State of New Jersey.

The proposed Technical Specification change contained herein represent changes to Specification 3/4.8.2.5 "28-Volt DC Distribution - Operating." This license amendment proposes to make Unit 1 requirements similar to Unit 2 by defining the specific battery chargers required for each train and also by restricting the use of the backup battery charger for a 7 day period. This change also revises both Salem Units for an operable 28-Volt DC bus to require that the bus also be energized.

The proposed changes have been evaluated in accordance with 10CFR50.91(a) (1), using the criteria in 10CFR50.92(c), and it has been determined that this request involves no significant hazards considerations.

A description of the requested amendment, supporting information and analyses for the change, and the basis for a no significant hazards consideration determination are provided in Attachment 1.

The Technical Specification pages affected by the proposed changes are provided in Attachment 2 with pen and ink changes.

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Document Control Desk LR-N95094 JAN 04 1996 Upon NRC approval of these proposed changes, PSE&G requests that the amendment be made effective on the date of issuance, but implemented within sixty days to provide sufficient time for associated administrative activities.

Should you have any questions regarding this request, we will be pleased to discuss them with you.

Sincerel~'....::---.,-

x~ L. F. orz Senior Vice President Nuclear Operations

• Affidavit Attachments (2)

C Mr. T. T. Martin, Administrator - Region I U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. L. Olshan, Licensing Project Manager - Salem U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 14E21 Rockville, MD 20852 Mr. C. Marschall (X24)

USNRC Senior Resident Inspector Mr. K. Tosch, Manager IV Bureau of Nuclear Engineering 33 Arctic Parkway CN 415 Trenton, NJ 08625

REF: LR-N95094 LCR 95-15 STATE OF NEW JERSEY SS.

COUNTY OF SALEM L. F. Storz, being duly sworn according to law deposes and says:

I am Senior Vice President - Nuclear Operations of Public Service Electric and Gas Company, and as such, I find the matters set forth in the above referenced letter, concerning Salem Generating Station, Units 1 and 2, are true to the best of my knowledge, information and belief.

Subscribed and Sworn~me (,OJ this

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day of '* 199~~~

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Notary Public of New Jersey My Commission expires on

ATTACHMENT 1 PROPOSED CHANGE TO TECHNICAL SPECIFICATIONS LICENSE AMENDMENT APPLICATION REVISION OF 28-VOLT DC SPECIFICATION SALEM GENERATING STATION UNITS NO. 1 AND 2 FACILITY OPERATING LICENSES DPR-70 AND DPR-75 LR-N95094 DOCKET NOS. 50-272 AND 50-311 LCR 95-15 I. DESCRIPTION OF THE PROPOSED CHANGES Salem Unit 1 Technical Specification (TS) 3.8.2.5 "28-Volt DC Distribution - Operating," Limiting Condition for Operation (LCO) is proposed to be revised to define the specific battery charger required for each train.

The Salem Unit 1 Technical Specification Action Statement 3.8.2.5.b is requested to be revised to delete reference to the battery chargers. A new Action Statement 3.8.2.5.c is proposed to restrict the use of the backup battery charger for a period not to exceed 7 days should the primary battery charger be inoperable. An editorial change to Action Statement 3.8.2.5.c for Unit 2 is also made for clarity.

For both Salem Units 1 and 2, Technical Specification Action Statement 3.8.2.5.a is being revised for an operable 28-Volt DC Bus to require that the bus also be energized.

II. REASONS FOR THE CHANGES The proposed changes to TS 3.8.2.5 will correct differences that currently exist between the Unit 1 and Unit 2 Technical Specifications. The Unit 1 TS 3.8.2.5 LCO does not specify the primary battery charger for each train, as does the Unit 2 TS. The primary and backup battery chargers are powered from different AC Vital buses. Therefore, using the backup charger would result in charging the DC buses from a different AC Vital bus than that of the primary battery charger. The Unit 1 TS Action Statement does not include a limit to the period of time that the battery can be connected to the backup battery charger as does the Unit 2 Action Statement that limits this to 7 days. Therefore, the proposed changes to the Unit 1 TS 3.8.2.5 LCO will identify the primary battery charger for each train, and restrict operation with the battery connected to the backup charger to 7 days in the Action Statement as currently contained in the Unit 2 TS.

In addition, both Units 1 and 2 Action Statements 3.8.2.5.a are being revised to require that the buses be energized.

This is consistent with the LCO that requires both 28-Volt DC trains to be operable and energized.

ATTACHMENT 1 LR-N95094 REVISION OF 28-VOLT DC SPECIFICATION LCR 95-15 III. JUSTIFICATION FOR CHANGES The 28-Volt DC power distribution system consists of two 28 Volt batteries, four battery chargers and associated switchgear. The batteries have 13 cells each and are rated at 800 ampere hours with an eight hour discharge rate. Two chargers are provided for each 28-Volt battery. Each charger has 100% capacity and is able to supply the DC loads and perform the required equalizing charge when necessary.

The chargers are supplied from the 23~ Volt Vital AC buses.

Each primary charger is powered from a different Vital AC bus (A or B) . The backup battery chargers are both powered from the C Vital bus. The supply breakers to the battery chargers are administratively controlled to allow only one charger at a time to supply the bus to prevent inter-connection of the 230 Volt Vital buses.

Normally, the battery chargers supply all of the loads and float-charge the batteries. In the event of a loss of AC power to the battery chargers, the batteries can supply the DC bus for two hours. Upon a loss of offsite power, the chargers will be fed from the emergency diesel generators.

The 28-Volt DC power Distribution System trains lA and lB are required to be operable to ensure the availability of the power sources in the event of a Design Basis Accident.

Each train is considered operable if the battery and associated primary battery charger are operating, connected to the associated buses, and the Surveillance Requirements of TS 4.8.2.5 are met. Loss of any of the 28-Volt DC power subsystems will not prevent the safety function of the system from being performed.

The primary and backup battery chargers are powered from different AC Vital buses. Therefore, using the backup charger results in charging the DC buses from a different AC Vital bus than that of the primary battery charger. The Unit 1 TS 3.8.2.5 LCO does not specify the primary battery charger for each train. This is not consistent with the Unit 2 TS which currently has the associated primary battery chargers specified. Specifying the primary battery charger to be used for each train will restrict the use of the backup charger. Also, the Unit 1 TS Action Statements do not include a limit to the period of time that the battery can be connected to the backup battery charger as does the Unit 2 Action Statement that limits this to 7 days.

Therefore, the proposed changes to the Unit 1 TS 3.8.2.5 LCO will identify the primary battery charger for each train, and restrict operation with the battery connected to the backup charger to 7 days. These changes are both consistent with the Unit 2 TS.

In addition, both Units 1 and 2 Action Statements 3.8.2.5.a are being revised to require that the buses be restored to

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ATTACHMENT 1 REVISION OF 28-VOLT DC SPECIFICATION

• LR-N95094 LCR 95-15 operable status and be energized. This is consistent with the LCO that requires both 28-Volt DC trains to be operable and energized.

IV. DETERMINATION OF NO SIGNIFICANT HAZARDS CONSIDERATION PSE&G has, pursuant to 10CFR50.92, reviewed the proposed amendment to determine whether our request involves a significant hazards consideration. We have determined that operation of Salem Generating Station Units 1 and 2 in accordance with the proposed changes:

1. Will not involve a significant increase in the probability or consequences of an accident previously evaluated.

The proposed changes do not alter plant configuration or operation. The proposed changes do not invalidate any of the parameters assumed in the UFSAR accident analyses. The proposed changes provide additional guidance to be used to ensure the operability of the safety related batteries, and requires the DC buses to be operable and energized consistent with the Limiting Condition for Operation (LCO) . Operability of these buses provide control room instrumentation power in support of mitigating Design Basis Accidents.

The changes to the Unit 1 Technical Specification (TS) 3.8.2.5 LCO and Action Statements restrict the use of the backup battery chargers, thereby limiting the amount of time that the chargers are allowed to be powered from another AC Vital bus. This change brings the Unit 1 TS into agreement with Unit 2, and results in a more conservative Unit 1 TS since both alternate battery chargers are fed from the same 230 V vital AC bus.

Therefore, the proposed amendment does not involve a significant increase in the probability or consequences of an accident previously evaluated.

2. Will not create the possibility of a new or different kind of accident from any previously evaluated.

The proposed changes do not introduce any design or physical configuration changes to the facility, or change the function of the 28-Volt DC Distribution System. Therefore, the proposed amendment will not create the possibility of a new or different kind of accident from any previously evaluated.

ATTACHMENT 1 LR-N95094 REVISION* OF 28-VOLT DC SPECIFICATION LCR 95-15

3. Will not involve a significant reduction in a margin of safety.

The proposed changes provide additional guidance to be used to ensure the operability of the safety related batteries. The changes to the Unit 1 Technical Specification (TS) 3.8.2.5 LCO and Action Statements restrict the use of the backup battery chargers, thereby limiting the amount of time that the chargers are allowed to be powered from another AC Vital bus. This change brings the Unit 1 TS into agreement with Unit 2, and results in a more conservative Unit 1 TS by precluding the possibility of both the lA and lB battery/buses from being supplied from a single bus.

Therefore, the proposed amendment will not involve a significant reduction in a margin of safety.

V. CONCLUSIONS Based on the above, PSE&G has determined that the proposed changes do not involve a significant hazards consideration.