ML20065S744
| ML20065S744 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 10/25/1982 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| TAC-48717, NUDOCS 8211020001 | |
| Download: ML20065S744 (3) | |
Text
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Telephone (412) 4566000 Nuclear Division P.O. Box 4 Shippingport, PA 15077@
October 25, 1982 Director of Nuclear Reactor Regulation United States Nuclear Rer,ulatory Commission Attn:
Mr. Steven A. Va;ga, Chief Operating Reactc rs Branch No. 1 Division of Licensing Washington, DC 2055."
Reference:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Revised Pages to Letter Dated October 5,1982 Centlemen:
Enclosed are two revised pages that should be changed in our letter dated October 5,1982 " Response to Request for Additional Information" concerning Technical Specification change request No. 77.
The attached revised pages 3 and 4 to that letter clarify the automatic actuatien signals to the applicable valves.
Please delete pages 3 and 4 from that response and insert these revised pages.
Very truly yours, Cmiare J. Carey Vice President, Nuclear Enclosure cc:
Mr. W. M. Troskoski, Resident Inspector U. S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, PA 15077 U. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555 Off 8211020001 921025 PDR ADOCK 05000334 P
7.
Bravar Vallsy Pow 2r Station, Unit No.1 e
Dockst No. 50-334, Licanza No. DPR-66 Rseponr3 to R:qutat for Additicna1'Information Page 3 B.
Criteria for leakage testing certain isolation valves using water as the test pressure fluid.
The minimum water inventory available in each system is adequate fo fulfill the system function even though one pump may be out of service (single active failure criteria) because each train is cross-connected to allow flow in each flowpa th.
Water evaporation and boiling is not c6nsidered a problem because af ter the initial one hour time period
+
following a LOCA, the containment pressure and temperature profiles assure that containment pressure is subatmospheric and containment temperature is approaching the normal containment operating range.
C.
Description of automatic valve actuation.
Reactor Coolant System Charging - (Pent. 15) 1CH-31 Close on Safety Injection Signal (SIS)
MOV-lCH-289 Valves would see HHSI discharge pressure on inlet side of the valve.
Seal Injection Water to Reactor Coolant Pump - (Pent. 35, 36, 37) 1CH-191, ICH-182 Valves would be open with HHSI 1CH-183, MOV-lCH-308A flow through them to maintain MOV-lCH-308B, MOV-lCH-reactor coolant pump seal injection 308C f low.
Steam Generator Blowdown - (Pent. 39, 40, 41)
TV-1BD-100A, TV-1BD-Close on CIA actuation, valves are 100B, TV-1BD-100C located within a sealed system and would not be subject to containment atmosphere.
Steam Generator Blowdown Samples - (Pent. 56, 105, 97)
TV-1SS-117A, TV-lSS-Close on CIA actuation, valves are 117B, TV-ISS-ll7C located within a sealed system and would not be subject to containment atmosphere.
High Head Safety Injection to Hot Legs - (Pent. 7,33)
ISI-83, ISI-84, See drawings for status during MOV-1SI-869A, MOV-ISI-various injection and recirculation 869B phases. Valves are either open or see j,,'
HHSI pressure on inlet side of valves for 30 days.
^ om Basvar Vall:y Powar Statien, Unit No.1 Dscket No. 50-334, Licenze No. DPR-66 Response to Request for Additional Information Page 4 Low Head Safety Inj. - (Pent. 60, 61, 62) 1S1-451, 1SI-452, See Drawings for status during various 1SI-10, 1SI-ll, 1SI-12, injection and recirculation phase.
ISI-13, 1SI-14, MOV-lSI-Valves are either open or see LHSI 890A, MOV-1SI-890B, MOV-discharge pressure for 30 days.
ISI-890C Quench Spray Pump-Discharge - (Pent. 63, 64)
MOV-1QS-101A, Opens on CIB actuation, valves would MOV-1QS-101B see QS pump discharge pressure for the initial one hour time period following a LOCA after which time containment will be subatmospheric.
Valves are then closed and will have RWST head pressure against them for 30 days.
Boron Injection (HHSI to Cold Legs) - (Pent. 113)
ISI-94, 1SI-91, Open on SIS actuation, valves would MOV-lSI-867C, MOV-1SI-see HHSI discharge pressure for 30 867D days.
High Head Safety Injection (HHSI) to Cold Legs - (Pent. 96)
ISI-95, MOV-lSI-836 See drawings for status furing various injection and recirculation phases.
Valves would see HHSI discharge pressure for 30 days.
Low Head S.I. Pump Suction from Containment Sump - (Pent 68, 69)
MOV-1SI-860A, Automatic recirculation phase MOV-1SI-860B changeover actuation, these valves are in the LHSI suction piping from the containment sump and would be water covered for 30 days.
Reactor Coolant System Fill - (Pent. 46)
ICH-170 Valves are normally closed and would FCV-1CH-160 see HHSI pump discharge pressure for 30 days.
D.
BVPS-1 Updated FSAR References Section 5.5 Design Evaluation states that "Through the use of the containment depressurization system, the containment returns to subatmospheric pressure within 60 minutes af ter initiation of a LOCA, thus terminating outleakage from the containment".
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