RBG-21884, Forwards Equipment Survivability Enhancement. Hydrogen Control Owners Group quarter-scale Testing Performed 17 Scoping Tests Demonstrating That Hydrogen Burn Phenomena Modeled by CLASIX-3 Computer Does Not Occur
| ML20134H154 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 08/16/1985 |
| From: | Booker J GULF STATES UTILITIES CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20134H157 | List: |
| References | |
| RBG-21884, NUDOCS 8508280298 | |
| Download: ML20134H154 (1) | |
Text
GULF STATES UTILITIES COMPANY P O S T O F F I C E B O X 2 9 51.GEAUMONT. TEXAS 77704 AREACODE 409 838-6031 August 16, 1985 RBG-21884 File No. G9.5 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555
Dear Mr. Denton:
River Bend Station-Unit 1 Docket No. 50-458 As requested by the Nuclear Regulatory Staff, Gulf States Utilities (GSU) is providing supplementary information and clarifications to assist in your evaluation of the adequacy of the Hydrogen Control System at River Bend Station. This supplementary information consists of two attachments. provides en assessment o'f equipment survivability enchancements which could, if necessary, be employed to mitigate the effects of a hydrogen generation event. The evaluation provided in this attachment is intended only to indicate the ability of these protection measures to enhance equipment survivability. Based on the conservative nature of the GSU preliminary analysis performed to date, we do not feel that there is a need for further consideration or implementation of any additional equipment protection measures.at this time. The Hydrogen Control Owners Group (HC0G) quarter scale testing has performed 17 scoping tests which have demonstrated that the hydrogen burn phenomena. modeled by the CLASIX-3 computer does not occur.
Therefore, the CLASIX-3 code may over-predict the hydrogen burn thermal environment.
If as a result of final analyses and completion of the HC0G program it is shown that equipment protection should be provided, GSU will provide this information at the first refueling outage or other schedule agreed to with your Staff. Attachment 2 provides responses to NRC Staff questions arising during the August 12, 1985, meeting with GSU.
}J.E.BookerSincerely$ &
E.4 c-c Manager-Engineering, Nuclear Fuels & Licensing River Bend Nuclear Group JEB/ ERG /EJZ/kt Attachments 8508280298 850816
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