ML20141E610

Forwards Request for Addl Info within 60 Days Re Spds,To Continue Review of 851015 Submittal

ML20141E610
Person / Time
Site:	Maine Yankee
Issue date:	02/11/1986
From:	Thadani A Office of Nuclear Reactor Regulation
To:	Randazza J Maine Yankee
References
NUDOCS 8602250300
Download: ML20141E610 (4)

Text

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t February 11, 1986 Docket No. 50-309 Mr. J. B. Randazza Executive Vice President Maine Yankee Atomic Power Company 83 Edison Drive Augusta, Maine 04336

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION CONCERNING THE SAFETY PARAMETER DISPLAY SYSTEM FOR MAINE YANKEE We have reviewed your October 15, 1985 submittal concerning the Safety Parameter Display System (SPDS) and concluded that insufficient information was provided to complete the evaluation. The enclosure requests specific information needed to complete the evaluation.

In order to preserve our present review schedule, the staff needs to have this information within 60 days from your receipt of this letter.

The information requested in this letter affects fewer than 10 respondents; therefore, OMB clearance is not required under P. L.96-511.

Sincerely,

/S/

Ashok C. Thadani, Director PWR Project Directorate #8 i

L Division of PWR Licensing-B

Enclosure:

As stated l

cc w/ enclosure:

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Mr. J. B. Randazza Maine Yankee Atomic Power Company Maine Yankee Atomic Power Station cc:

Charles E. Monty, President Mr. P. L. Anderson, Project Manager Maine Yankee Atomic Power Company Yankee Atomic Electric Company 83 Edison Drive 1671 Worchester Road Augusta, Maine 04336 Fraraingham, Massachusetts 07101 Mr. Charles B. Brinkman Mr. G. D. Whittier Manager - Washington Nuclear Licensing Section Head Operations Maine Yankee Atomic Power Company Combustion Engineering, Inc.

83 Edison Drive 7910 Woodmont Avenue Augusta, Maine 04336 Bethesda, Maryland 20814 John A. Ritsher, Esquire Ropes & Gray 225 Franklin Street Boston, Massachusetts 02110 State Planning Officer Executive Department 189 State Street Augusta, Maine 04330 Mr. John H. Garrity, Plant Manager Maine Yankee Atomic Power Company P. O. Box 408 Wiscasset, Maine 04578 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsy! <ania 19406 First Selectman of Wiscasset Municipal Building U.S. Route 1 Wiscasset, Maine 04578 Mr. Cornelius F. Holden Resident Inspector c/o U.S. Nuclear Regulatory Commission P. O. Box E Wiscasset, Maine 04578 J

d REQUEST FOR ADDITIONAL INFORMATION CONCERNING THE MAINE YANKEE ATOMIC POWER PLANT SAFETY PARAMETER DISPLAY SYSTEM Each operating reactor shall be provided with a Safety Parameter Display System (SPDS). The Connission approved requirements for an SPDS are defined in NUREG-0737 Supplement 1.

In the Regional workshops on Generic Letter 82-33 held during March 1983, the NRC discussed these requirements and the staff's review of the SPDS.

The staff reviewed the SPDS safety analysis and supplemental documents provided by Maine Yankee Atomic Power Company (Reference 1). The staff was unable to complete the review because of insufficient infonnation.

The following additional infonnation is required to continue and complete the review:

INSTRUMENTATION AND CONTROL SYSTEMS BRANCH Isolation Devices

)

Provide the following:

a.

For the type of device used to accomplish electrical isolation, describe the specific testing perfonned to demonstrate that the device is accept-i able for its application (s). This description should include elementary diagrams when necessary to indicate the test configuration and how the maxista credible faults were applied to the devices.

i

Ie b.

Data to verify that the maximum credible faults applied during the test were the maximum voltage / current to which the device could be. exposed, and define how the maximum voltage / current was determined.

Data to verify that the maximum credible fault was applied to the output c.

of the device in the transverse mode (between signal and return) and other faults were considered (i.e., open and short circuits).

d.

Define the pass / fail acceptance criteria for each type of device.

Provide a cannitment that the isolation devices comply with the environ-e.

ment qualifications (10 CFR 50.49) and with the seismic qualifications which were the basis for plant licensing.

f.

Provide a description of the measures taken to protect the safety systems from electrical interference (i.e., Electrostatic Coupling, EMI, Common Mode and Crosstalk) that may be generated by the SPDS.

g.

Provide information to verify that the Class IE isolator is powered from a Class IE power source.

REFERENCE:

1.

Letter from G. D. Whittier (MN-85-106) to J. R. Miller, May 31, 1985.

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