ML20216H975

Summary of 850311 Meeting W/Util Re Alternative Approach to 10CFR50,App R,Section Iii.O Requirements.W/List of Attendees

ML20216H975
Person / Time
Site:	Maine Yankee
Issue date:	04/03/1985
From:	Heitner K Office of Nuclear Reactor Regulation
To:	John Miller Office of Nuclear Reactor Regulation
References
NUDOCS 9709170124
Download: ML20216H975 (3)

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%,,,,,/} April 3, 1985 Docket No. 50- 309 j MEMORANDUM FOR: James R. Miller, Chief IE Operating Reactors Branch #3-Division of Licensing . .

FROM: Kenneth L. Heitner, Project Manager b [M PUBLIC 8 erating Reactors Branch #3

% of Licensing PUBLIC BOCUMENT F0OM ,

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SUBJECT:

g " ass A F MEETING WITH MAINE YANKEE ATOMIC P R ., PANY TO DISCUSS 10 CFR 50, Ag EN g g g g SECTION III.0, ON MARCH 11, 1985 TlHE PE0VLSTED The purpose of this meeting was for Maine Yankee to discusil@ N N44WS approaches they were evaluating in order to comply with 10 CFR 50, Appendix R. Section,0. Attendees at this meeting are listed in Attachment I.

At the onset of the meeting Maine Yankee stated they did not intend to appeal the staff's draft denial of their exemption request to 10 CFR 50, Appendix R, Section 0. Their approach was rather to examine practical approaches to com-plying with the rule that would not unduly interfere with plant operation.

The Maine Yankee Reactor Coolant Pumps (RCPs) had essentially two independent

. lubricating systems. The top bearing system, which included the thrust bearing, had about 114 gallons of oil. This was a pressurized system and had numerous potential '3akage points. The bottom bearing, which contained 24 gallons of oil, was passia with only one fill and drain tube as potential leakage points.

Maine Yankee's plan of action called for constructing a " berm" around the upper housing of the pump to collect oil leakage. Baffles would be added to catch pressurized spray from appropriate places such as pumps and heat exchangers.

A new-drain tank would be installed which was capable of holding the entire con-tents of the upper bearing.

The system would be designed to be bolted on to the pumps, to retain access for servicing. The " berm" would be high enough to contain an instantaneous sp'ill. "

Maine Yankee stated that the detailed engineering remained to be done. They were also awaiting delivery of a spare pump which would be an aid to the design process.

The staff stated that this approach appeared to conform to the technical requirements of Section III.0 of the rule in that:

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- All oil was contained and drained to a vented and closed container, 011 spray was contained, and ,f

- _The system would function after a seismic event. ,

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Maine Yankee's approach for the lower bearing was still under study pending verification of "as built" configurations. Maine Yankee stated it would be difficult to control leakage down the bearing shaft because of existing instrumentation for the pump and pump seals in this area. They noted, however, that the seal area was cooled and not a potential ignition source. Maine Yankee -

was considering additional protection for the lower bearing fill drain line.

They also stated they would evaluate use of a higher flash point oil in lhis bearing. It was agreed to have further discussions concerning the lower bearing in four to six weeks.

')*l . & .\,,v Kenneth L. Heitner, Project Manager Operating Reactors Branch #3 Division of Licensing

Attachment:

As stated

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Attachment I t- ,

1 MEETING ON MARCH 11. 1985 ,

. WITH MAINE YANKEE ATOMIC ,

POWER CO. ON APPENDIX R' Name Organization K. L. Heitner NRC/NRR/DL-Project Manager James R. Miller- NRC/NRR/DL-Chief ORBf3 Joe McCumber Yankee Atomic Electric Co.

D. Whittier Maine Yankee J. Randazza- Maine Yankee R. L. Ferguson NRC/NRR/DE D. Kubicki NRC/NRR/DE/CMEB' V. Benaroya NRC/NRR/DE/CMEB e

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