View source for RBG-21730, Responds to Instrumentation & Control Sys Branch Request for Addl Info Re Item 2 of Encl 2 in Tm Novak . Surveillance Test Procedures STP-2010601-210604 Will Include Provisions to Test Interlock Per SER Section 7.4.2.3

{{Adams
| number = ML20132E914
| issue date = 07/31/1985
| title = Responds to Instrumentation & Control Sys Branch Request for Addl Info Re Item 2 of Encl 2 in Tm Novak . Surveillance Test Procedures STP-2010601-210604 Will Include Provisions to Test Interlock Per SER Section 7.4.2.3
| author name = Booker J
| author affiliation = GULF STATES UTILITIES CO.
| addressee name = Denton H
| addressee affiliation = NRC OFFICE OF NUCLEAR REACTOR REGULATION (NRR)
| docket = 05000458
| license number = 
| contact person = 
| document report number = RBG-21730, NUDOCS 8508020137
| title reference date = 07-25-1985
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| page count = 2
}}

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GDLF STATES                UTILITIES COMPANY POSTOFFICE BOX 2951
* DEAUMONT. TLXAS 77704 AaEA C0DE 409 038663t July 31 1985 RBG 21730 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 Provided below for your review is Gulf States Utilities Company's response to additional information requested by the Nuclear Regulatory Commission's Instrumentation and Control Systems Branch regarding Item 3 of Enclosure 2 contained in a {{letter dated|date=July 25, 1985|text=letter dated July 25, 1985}} from T. M.
Novak to W. J. Cahill, Jr. This information supplements our previous response to this item contained in a letter from J. E. Booker to H. R.
Denton dated July 26, 1985-(RBG - 21684) and has been previously discussed with your Staff.
The Safety Evaluation Report (Section 7.4.2.3) requires the River Bend Station Technical Specifications to include provisions for periodic testing of the standby liquid control system (SLCS) interlock with the test valve (C41*F031). Gulf States Utilities will provide in Surveillance Test Procedures (STP-2010601 and STP-2110604) provisions to test the interlock. These tests will be performed in three stages.
In the first test, the pump and squib valve will be racked-out and a system initiation signal will be generated using the main control room initiation key lock switch with the test valve open.            In the second test, the same conditions will apply with the exception that the test valve will be closed. (This test verifies that the suction valve will open.) In the third test the storage tank suction valve will be racked-out and a system initiation will fire the squib valve, start the pump and inject domineralized water into the vessel.
The above test will demonstrate that the storage tank suction valve (C41*F001) will open in response to a system level manual actuation signal when the test valve is closed.             (This test will demonstrate that the interlock function has not failed.) GSU PDR  ADOCK 05000458                                   '
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therefore concludes that the interlock.is tested in accordance with the current existing River Bend Station Technical Specifications.
Sincerely,
                                                                                                                       . h.         b J. E. Booker Manager-Engineering Nuclear Fuels & Licensing River Bend Nuclear Group JEB/DW/JEP
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