ML20215N385

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Forwards Revised 1/4 Scale Production Test Matrix to Reflect Addl Two Tests in River Bend Configuration.Manner in Which Production Tests Run Revised After Completion of Perry Tests
ML20215N385
Person / Time
Site: River Bend Entergy icon.png
Issue date: 11/03/1986
From: Langley J
GULF STATES UTILITIES CO., HYDROGEN CONTROL OWNERS GROUP
To: Bernero R
Office of Nuclear Reactor Regulation
References
HGN-108, NUDOCS 8611050321
Download: ML20215N385 (3)


Text

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s MARK lli CONTAINMENT HYDROGEN CONTROL OWNERS GROUP J. R. Longley, Project Monoger c/o Gulf Stores Utilities e North Access Road at Highway 61 e St.Francisville LA 70775 504-605-6094 Ext. 2002 November 3, 1986 HGN-108 Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. Robert Bernero

Dear Mr. Bernero:

Subject:

Updated Test Matrices The Hydrogen Control Owners Group (HCOG) has recently modified the 1/4 scale production test matrix to reflect an additional two tests in the River Bend configuration. The revised test matrix is attached. The two additional tests will include a test with a simulated stuck-open relief valve (SORV) in the 135 chimney and a test with the unit cooler exhausting chilled air locally (i.e.,

immediately downstream of the unit cooler). This latter test will be conducted using the SORV which produces the most thermally limiting local thermal environment.

Subsequent to the completion of the Perry production tests, the HCOG revised the manner in nich production tests are run. As discussed with an NRC staff member, production tests in the 1/4 Scale Test Facility involving a stuck-open relief valve are being run with a 0.1 lbm/sec hydrogen tail until a 55% FNR has been simulated. This reflects a revision from the previous testing procedures which simulated 75% MWR hydrogen release histories.

The modified testing procedures provide a level of temperature data equivalent to the 75% MWR tests, since temperatures in the test facility become relatively constant prior to reaching 55% MWR. The HCOG will extrapolate the temperature trace from 55% to 75% MWR to support the requirements of 10 CFR 50.44(c). The modified testing procedure is being implemented to support testing in a combustion regime for which the facility was designed. Those production tests which involve the injection of hydrogen through ADS valves and LOCA vents will continue to be run out to 75% MWR.

This submittal was compiled by HCOG from the best information available for submittal to the Nuclear Regulatory Commission. The submittal is believed to be complete and accurate, but it is not submitted on any specific plant docket. The information contained in this letter and its attachments should not be used for evaluation of  %

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Page 2 of 2 HGN-108 any specific plant unless the information has been endorsed by the appropriate member utility. HCOG members may individually reference this letter in whole or in part as being applicable to their specific plants.

Very truly yours, b

J. R. Langley Project Manager JRL/jlw Attachment cc: Mr. Lester L. Kintner Hydrogen Control Project Manager U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D. C. 20555 Mr. J. Kudrick Plant Systems Branch Division of BWR Licensing Office of Nuclear Reactor Regulation Washington, D. C. 20555 Dr. R. W. Houston Deputy Director, Division of BWR Licensing U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D. C. 20555

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