ML20011D362
| ML20011D362 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 12/18/1989 |
| From: | Bradham O SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8912270050 | |
| Download: ML20011D362 (2) | |
Text
{{#Wiki_filter:-- - -{ So th stoima Lisetric & G:s Compsny le S D.adh:m u Jenkinsvme SC 29065 - Nuclear Operations -; f - (803) 3454040 -SCE&G-December-18, 1989 Document Control Desk _ -U. S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Technical Specifications Change Request - RHR Autoclosure Interlock Removal Gentlemen: As requested in the November 14, 1989, conference call with Mr. Jack Hayes .and Mr. George Schwenk, both of the Nuclear Regulatory Commission, the following is additional information on the South Carolina Electric & Gas LCompany (SCE&G) Technical Specifications change request for RHR Autoclosure ' Interlock Removal. Specifically, the proposed amendment deletes the ECCS Surveillance Requirement to test the RHR autoclosure capability every 18 months. SCE&G is requesting the change to' address concerns regarding the potential-loss,of RHR capability due to failure of the ACI circuitry during u cold shutdown and refueling operations..Mr.' Schwenk, who is the Technical Reviewer for the Virgil C. Summer Nuclear Station _(VCSNS) submittal, requested-the following information: (1). 'Is RHR suction valve position indication available in the Control Room when power is~ locked out on the valves? .SCE&G Response-RHR Suction Valve position indication is available in the Control Room L when power is locked out on the valves. VCSNS has redundant position I indication such that when power is taken off each valve the Engineered Safety Features (ESF) Monitor Lights provide.the status of each RHR suction valve. The limit switches and power supplies for the ESF 4 - Monitor Lights are independent from the control switch valve position indication limit switches and power supply. (2) Provide additional information on the following procedural items: (A) Verification that there will be a surveillance procedure for the alarm which alerts-the operator that an inlet isolation valve is not fully closed when the RCS pressure is above the RHR alarm setpoint of 520 psig. (B) Verification that there will be an " Alarm Recognition Procedure" that will include iristructions not to continue plant heatup and/or pressurization with the alarm in. AON 10 ~8912270050 891218 PDR ADOCK 05000395 w ~:P PDC-
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- Document Contro1' Desk:
n ' December 18, 1989 Page.2 of 2 (C)- Verification that there is an " additional and absolute" means of j determining that the valves are closed subsequent-to removing power. SCE&G ResDonse 1 (A) VCSNS will have a Surveillance Procedure for the alarm which will require a surveillance to be performed at each refueling outage. (B) VCSNS will have an Annunciator Response Procedure requiring operators to. discontinue plant heatup and/or pressurization until the alarm is cleared. i (C) VCSNS Operating Procedures will require operators to verify that the Engineered Safety Features Monitor Lights indicate that the valves are closed subsequent to removing power. All the above indications are verified each refueling outage in accordance with -ASME Section XI Requirements for Remote Position Indication. The limit switches on these motor operators are also checked for accuracy every three years under the motor operated valve diagnostic testing-program. Should you have any questions, please call at your convenience. Very truly yours, Y t&
- 0. S. Bradham EWR/0SB: led l
1. c: D. A. Nauman/0. W. Dixon, Jr./T. C. Nichols, Jr. E. C. Roberts W. A. Williams, Jr. S. O. Ebneter J. J. Hayes, Jr. General Managers l C. A. Price R. B. Clary r K. E. Nodland J. C. Snelson l R. L. Prevatte H. G. Shealy i J. B. Knotts, Jr. E. W. Rumfelt NSRC NPCF l~ RTS (TSP 890008) File (813.20) l l ,}}