ML20137U503

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Summary of 851108 Meeting W/Util Re Util Response to Generic Ltr 84-09 on Hydrogen Recombiner Capability.List of Attendees Encl
ML20137U503
Person / Time
Site: Brunswick  Duke Energy icon.png
Issue date: 11/22/1985
From: Grotenhuis M
Office of Nuclear Reactor Regulation
To:
Office of Nuclear Reactor Regulation
References
GL-84-09, GL-84-9, NUDOCS 8512090333
Download: ML20137U503 (4)


Text

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- - November 22, 1985 Docket Nos. 50-325/324 LICENSEE: Carolina Power & Light Company (CPll)

FACILITY: Brunswick Steam Electric Plant, Units 1 and 2

SUBJECT:

SUMMARY

OF MEETING HELD ON NOVEMBER 8,1985 TO DISCUSS THE CP&L RESPONSE TO GENERIC LETTER (GL) 84-09

Background

The rule on hydrogen recombiner capability was issued on December 2, 1981.

On May 8, 1984, the staff completed an evaluation of the BWR Mark i Owners Group report and issued Generic Letter 84-09. This letter provided criteria by which licensees could determine whether the hydrogen recombiner capability was required. On June 8,1984, CP&L responded by stating that the Brunswick facilities meet Criteria 1 and 3 and, with modifications, would also meet Criterion 2. On January 15, 1985, the staff requested additional information. On March 1, 1985, CP&L responded. On March 26, 1985, the staff reiterated the request based on a conflicting interpretation of Criteria 2. CP&L responded on April 26, 1985, requesting a meeting a clarify and resolve the issue. A May 29, 1985 meeting was held for that purpose. Based on the May 29, 1985 meeting, CP&L responded to the staff's March 26, 1985 Request for Additional Information by letter dated July 15, 1985. However, the staff could not understand the details of the Brunswick instrument air and inerting systems well enough to determine whether they meet Criterion 2 of GL 84-09. The staff position expressed by Criterion 2 is that there should be no source of oxygen inside containment during operation including the air in the instrument air systems. CP&L proposed a nitrogen switchover system that isolated the instrument air and replaced air with nitrogen at the time of a loss-of-coolant accident (LOCA). The difficulty was in determining whether this nitrogen switchover system in conjunction with other features of the Brunswick systems, is an acceptable alternative to Criterion 2. This current meeting was held to discuss the details of the nitrogen switchover system proposed by CP&L for the Brunswick facilities. Attendees are listed in Enclosure 1.

Sumary The Brunswick air and nitrogen systems as well as the related Technical Specifications and procedures were thoroughly described by CP&L and discussed. The system piping is designed to Seismic Class I requirements.

The procedures are designed to keep the oxygen concentration below 4%, and have succeeded in doing so for about the past 2 years. In practice, the oxygen concentration is nonnally kept below 1%. When the gradual drift gets this value to 3.2%-3.5%, (an alarm is set for 3.7%) action is taken to reduce this value to less than 1% (about a 2-hour process).

0512090333 B511P2 4 PDR ADOCK 050 P

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Based on the presentation and discussion, the staff could not conclude that Criterion 2 of Generic Letter 84-09 was met, i.e., that acceptable compensatory measures were taken. CP&L will evaluate the possibility of the use of an oxygen gradient control and automatic isolation of the instrument air system as possible compensatory measures. - The staff will consider the new details available regarding the Brunswick system. A conference call will be held in about I week after which a staff position will be issued.

Original signed by/

Marshall Grotenhuis, Project Manager Operating Reactors Branch #2 Division of Licensing

Enclosure:

As stated cc w/ enclosure:

See next page DISTRIBUTION EN NRC PDR Local PDR ORB #2 Reading ORB #2 Mtg Summ File MGrotenhuis DVassallo OELD ELJordan BGrimes ACRS (10)

NRC Participants DL:0RB#2 OL:0RB#2 MGrotenhuis:ajs -0Vassallo 11p)f485 11G/1/B5 J

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Mr. E. E. Utley Carolina Power & Light Company Brunswick Steam Electric Plant; Units 1 and 2 cc:

Pichard E. Jones, Esquire J. Nelson Grace Carolina Power & Light Company Regional Administrator 336 Fayetteville Street Region II Office Raleigh, North Carolina 27602 U. S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 George F. Trowbridge, Esquire Atlanta, Georgia 30303 Shaw, Pittman, Potts and Trowbridge i 1800 M Street, N. W. Dayne H. Brown, Chief Washington, D. C. 20036 Radiation Protection Branch Division of Facility Services Mr. Charles R. Dietz Department of Human Resources l Plant Manager Post Office Box 12200 l Post Office Box 458 Raleigh, North Carolina 27605 Southport, North Carolina 28461 Mr. Franky Thomas, Chairman Board of Comissioners Post Office Box 249 Bolivia, North Carolina 28422 Mrs. Chrys Baggett State Clearinghouse Budget and Management 116 West Jones Street Raleigh, North Carolina 27603 Resident Inspector U. S. Nuclear Regulatory Commission Star Route 1 Post Office Box 208 Southport, North Carolina 28461 - -

D 9

LIST OF ATTENDEES Ar NOVEMBER 8, 1985 MEETING ON THE CP&L RESPONSE TO GENERIC LETTER 84-09 Name Affiliation M. Grotenhuis NRC/NRR/DL D. Vassallo NRC/NRR/DL J. Kudrick NRC/NRR/DSI R. Schauder CP&L/ Licensing R. Poulk, Jr. CP&L W. Murray CP&L/ Licensing R. Martin CP&L/BESU 1

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