ML19309F724
| ML19309F724 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 04/04/1980 |
| From: | Baer R Office of Nuclear Reactor Regulation |
| To: | Crews E SOUTH CAROLINA ELECTRIC & GAS CO. |
| References | |
| NUDOCS 8004300468 | |
| Download: ML19309F724 (5) | |
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Docket Nc. 50-395 Mr. E. H. Crews, Jr.
Vice President and Group Executive Engineering and Construction South Carolina Electric and Gas Company P. O. Box 764 Columbia, South Carolina 29218
Dear Mr. Crews:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON THE FINAL SAFETY ANALYSIS REPORT FOR THE VIRGIL C. SU!@lER NUCLEAR STATION As a result of our review of recent amendments to the Final Safety Analysis Report (FSAR) for the Virgil C. Summer Nuclear Station, we find that we need additional information to complete our review. contains requests for infonnation and positions which cover the areas of Instrumentation and Control and Initial Tests. After you have reviewed the requests, we request that you provide us with your schedule for providing responses.
Sincerely, Ro/
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bert. Baer, Chief Light Water Reactors Branch No. 2 Division of Project Management
Enclosure:
Requests For Additional Information ces w/ enclosure:
See next pages
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Mr. E. H. Crews, Jr., Vice President APR 0 41980 and Group Executive - Engineering and Construction South Carolina Electric & Gas Company P. O. Box 764 Columbia, South Carolina 29218 cc: Mr. H. T. Babb General Manager - Nuclear Operations and System Planning South Carolina Electric & Gas' Company P.'0. Box 764 Columbia, South Carolina 29218 G. H. Fischer, Esq.
Vice President & Group Executive South Carolina Electric & Gas Company P. O. Box 764 Columbia, South Carolina 29218 Mr. William C. Mescher President & Chief Executive Officer South Carolina Public Service Authority 223 North Live Oak Drive Moncks Corner, South Carolina 29461 Mr. William A. Williams, Jr.
Vice President South Carolina Public Service Authority 223 North Live Oak Drive Moncks Corner, South Carolina 29461 Wallace S. Murphy, Esq.
General Counsel South Carolina Public Service Authority 223 North Live Oak Drive Moncks Corner, South Carolina 29461 Troy B. Conner, Jr., Esq.
Conner, Moore & Corber 1747 Pennsylvania Avenue, N. W.
Washington, D. C.
20006 Mr. Mark B. Whitaker, Jr.
Manager, Nuclear Licensing South Carolina Electric & Gas Company P. O. Box 764 Columbia, South Carolina 29218 Mr. O. W. Dixon Group Manager, Production Engineering South Carolina Electric & Gas Company P. O. Box 764 Columbia, South Carolina 29218 l
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APR o 4150 Mr. E. H. Crews, Jr.
cc: Mr. Brett Allen Bursey Route 1 Box 93C Little Mountain, South Carolina 29076 Resident Inspector /Sumer Power Station c/o V. S. Nuclear Regulatory Comission -
P. O. Box 1047 Irmo, South Carolina 29063 1
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6 APR v 41980 031. 0 INSTRUMENTATION AND CONTROL SYSTEMS 031.60 By letter dated October 24, 1979, you provided a notification of a potential significant deficiency for ASCO NP-1 solenoid valves The corrective action indicates that the elastomers in all Class IE qualified ASCO NP-1 solenoid valves will be replaced with viton kits. This letter does not, however, address the impact that this change could have on the documentation used as the bases for the environmental qualification of these valves.
Therefore, we request that you address this concern and revise the FSAR if any of the material presented therein is in conflict with the bases that these solenoids are cualified or the quali-fication documentation.
031. 61 In the Virgil C. Summer Plant Design there are various flow paths located between the MSLIV and the turbine stop valves (Figure 10.3-2) that serve functions such as draining water back to the condenser and providing steam to the extractor and steam-driven feedwater pumps during reactor startup operations. To confirm satisfactory performance after a steam line break provide the following information, as applicable, related to these various flow paths that branch off between the MSLIV's and the turbine stop valves:
(a) the maximum steam flow in each flow path (b) the types of valves (c) the size of valves (d) the quality of the valves (e) the design code of the valves (f) the closure time of the valves (g) the actuation mechanism of the valves (h) the closure signal including sensor (i) quality of power sources to valves and sensors (j ) quality of air supply to air-operated valves.
APR v 4120 423.0 INITIAL TESTS 423.37 It has come to our attention that some applicants did not intend to conduct confirmatory tests of some distribution systems and transformers supplying power to vital huses as required by Position 3 of Regulatory Guide 1.68, and more specifically by Part 4 of the staff position on degraded grid voltage (applied to all plants in licensing review by the Power Systems Branch since 1976). Part 4 of the degraded grid voltage position states as follows:
"4.
The voltage levels at the safety-related buses should be optimized for the full load and minimum load con-ditions thattare expected throughout the anticipated range of voltage variations of the offsite power source by appropriate adjustment of the voltage tap settings of the intervening transformers. We require that the adequacy of the design in this regard be verified by actual measurement and by correlation of measured values with analysis results. Provide a description of the method for making this verification; before initial reactor power operation, provide the documen-tation required to establish that this verification has been accomplished."
Your test description in FSAR Chapter 14 does not contain suffi-cient detail for us to determine if you intend to conduct such a test.
It is our position that confimatory tests of all vital buses must be conducted including all sources of power supplies to the buses. Modify yourtest description to indicate that this testing will be conducted in accordance with Regulatory Guide 1.68 and the above cited position.
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