ML20211N567

Forwards SER Re 860630 Submittal of Position on First Level Undervoltage Protection.Monthly Testing of Relays Not Required.Requirement for Refueling Interval Testing Should Be Added to Tech Specs

ML20211N567
Person / Time
Site:	Yankee Rowe
Issue date:	02/19/1987
From:	Mckenna E Office of Nuclear Reactor Regulation
To:	Papanic G YANKEE ATOMIC ELECTRIC CO.
Shared Package
ML20211N572	List: ML20211N567 ML20211N588
References
NUDOCS 8703020126
Download: ML20211N567 (3)

Text

F

• FEB 19 $87 u

. Docket No.50-029 Mr. George Papanic, Jr.

Senior Project Engineer-Licensing Yankee Atomic Electric Company 1671 Worcester Road Framingham, Massachusetts 01701

SUBJECT:

YANKEE NUCLEAR POWER STATION - FIRST LEVEL UNDERV0LTAGE PROTECTION Multi-plant action Item B-23, Potential Equipment Failures Associated with Degraded Grid Voltage, established a requirement for undervoltage protection logic in the event of degraded grid voltage. This was in addition to the protection already provided on emergency buses for a loss of voltage condition.

A staff safety evaluation (SE) on this subject was issued on September 27, 1982. On January 4, 1985, the NRC issued a revised SE addressing degraded grid voltage protection for Yankee. That SE requested that you provide Technical Specification (TS) changes for monthly testing of both the first level (loss of voltage) and second level (degraded grid) undervoltage protection relays.

Technical Specifications for monthly testing of the second level relays were implemented in Amendment 89 to the license on November 30, 1985. In that letter, the staff reiterated its request for TS on the first level relays.

In a letter dated December 26, 1985 you proposed to respond to this concern by June 1986.

On June 30, 1986, you submitted your position regarding the first level relays which stated that the existing testing of the relays is sufficient such that changes to permit monthly testing and inclusion in the TS is unnecessary. Further information was provided by letters dated October 22, 1986 and December 4, 1986 in response to staff requests.

As discussed in the enclosed SE, the staff concludes that monthly testing would not improve the reliability of the first level protection and therefore that monthly testing is not required. However, the staff further concludes 870302Q PDR A $ $ hPDH 29 P

t that the requirement .for refueling interval testing should'be added to the Technical Specifications. Within 30 days of receipt of this letter, please provide your schedule for submittal of these Technical Specification changes.

Sincerely, j

/s Eileen M. McKenna, Project Manager Project Directorate #1 Division of PWR Licensing-A i

Enclosure:

As Stated '

j cc's: See Next Page i

1-e i

1 i.

Office:

Surname: EMcKenna/tg P Mb Pkf$lDM'f Glear l Date: 02//f/87 02//1/87[U

• i i

--e-- wmms.w..._y- ,.-.,.,.,.,_e-- -.-..+.ce,--ww..-.x -....- . .-- - -.. ,_,_.__ ..-__ _ .

%_ e- . . - - - , .

. Mr. George Papanic, Jr.

Yankee Atomic Electric Company Yankee Nuclear Power Station cc:

Mr.' James E. Tribble, President Yankee Atomic Electric Company 1671 Worcester Road Framingham, Massachusetts 01701-Thomas Dignan, Esquire Ropes and Gray 225 Franklin Street Boston, Massachusetts 02110 Mr. N. N. St. Laurent Plant Superintendent Yankee Atomic Electric Company Star Route Rowe, Massachusetts 01367 Chairman Board of Selectmen .

Town of Rowe Rowe, Massachusetts 01367 Resident Inspector Yankee Nuclear Power Station clo U.S. NRC -

Post Office Box 28 Monroe Bridge, Massachusetts 01350 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 Robert M. Hallisey, Director Radiation Control Program Massachusetts Department of Public Health 150 Tremont Street, 7th Floor Boston, Massachusetts 02111

. .- - . _ - . -_