ML18139B995

Application for Amend to Licenses DPR-32 & DPR-37 Changing Tech Specs to Reflect Degraded Voltage Protection Sys Mod

ML18139B995
Person / Time
Site:	Surry
Issue date:	08/17/1982
From:	Leasburg R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Harold Denton, Varga S Office of Nuclear Reactor Regulation
Shared Package
ML18139B996	List: ML18139B995 ML18139B997
References
451, NUDOCS 8208230280
Download: ML18139B995 (4)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND,. VIRGINIA 23261 R.H. LEASBURO August 17, 1982 VICE PRESIDENT NUCLEAR OPERATIONS Mr. Harold R. Denton, Director Serial No. 451 Office of Nuclear Reactor Regulation NO/GSS:acm Attn: Mr. Steven A. Varga, Chief Docket Nos. 50-280 Operating Reactors Branch No. 1 50-281 Division of Licensing License Nos. DPR-32 U. S. Nuclear Regulatory Commission DPR-37 Washington, D. C. 20555 Gentlemen:

AMENDMENT TO OPERATING LICENSES DPR-32 AND DPR-37 SURRY POWER STATION UNITS NO. 1 AND NO. 2 PROPOSED TECHNICAL SPECIFICATION CHANGE Pursuant to 10 CFR 50.90, the Virginia Electric and Power Company requests an amendment, in the form of changes to the Technical Specification, to Operating License DPR-32 and DPR-37 for the Surry Power Station, Units No. 1 and No. 2.

The proposed changes are enclosed.

This request is to revise the Surry Technical Specification Tables 3. 7-2, 3.7-4, 4.1-1 and Section 4.6 to reflect the degraded voltage protection system modification.

The Nuclear Regulatory Commission in a letter to Vepco dated July 11, 1979, requested information regarding the Surry AC Emergency Bus Protection System.

An evaluation revealed that a degraded bus voltage protection system should be installed at Surry to provide undervoltage protection between 75 and 90 percent of nominal voltage.

The degraded voltage protection system modification is such that a sustained undervoltage condition on the emergency buses will transfer power from the preferred offsite source experiencing the undervoltage condition to the on-site source. The load shed prevention feature ensures no load will be shed from the emergency buses once they are fed from the on-site source. The diesel generator breaker closing permissive eliminates the possibility of the diesel generator energizing the emergency bus loads at a voltage below 95% of rated voltage.

The proposed Technical Specification changes require the operability of 2 of 3 undervoltage/degraded voltage sensing channels per emergency bus, with a degree of redundancy of 1/bus. The Specification establishes the setpoints for degraded voltage and loss of power, as well as requiring periodic functional testing and calibration. Also, the enclosed Specifications include the testing 'requirement to demonstrate the operability of the automatic bypassing and automatic reinstatement of the undervoltage relays when the diesel generators are supplying the class lE buses. These new specifications will ensure operability of the degraded voltage protection system modification.

18208230280 8208 'i 7 -----...,

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VIRGINIA ELECTRIC AND PowEH CoM:PANY To Harold R. Denton This request has been reviewed and approved by the Station Nuclear Safety and Operating Committee and by the Safety Evaluation and Control staff. It has been determined that this request does not involve an unreviewed safety question.

We have evaluated this request in accordance with the criteria in 10 CFR 170. 22. It has been determined that a Class III and a Class I license amendment fee is required for Unit 1 and Unit 2, respectively. Accordingly, a voucher check for the amount of $4,400 is enclosed in payment of the required fees.

Veryl;;tCu/

R.~

Attachments:

1. Proposed Technical Specification Change

2. Voucher Check No. 72832 for $4,400 cc: Mr. James P. O'Reilly Regional Administrator Region II

COMMONWEALTH OF VIRGINIA)

)

CITY OF RICHMOND )

The foregoing document was acknowledged before me, in and for the City and Commonwealth aforesaid, today by R.H. Leasburg, who is Vice President-Nuclear Operations, of the Virginia Electric and Power Company. He is duly authorized to execute and file the foregoing document in behalf of that Company, and the statements in the document are true to the best of his knowledge and belief.

-cL Acknowledged before me this I 7 day of ~ , 19 S>.;2......

My Commission expires: 19 ~~.

Notary Public (SEAL)

Vepco VIRGINIA ELECTRIC AND POWER COMPANY 611-5119 514 I RICHMOND. VIRGINIA BANK OF VIRGINIA L

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