ML19247B714
| ML19247B714 | |
| Person / Time | |
|---|---|
| Issue date: | 06/20/1979 |
| From: | Triplett P Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19247B712 | List: |
| References | |
| CON-FIN-A-0231, CON-FIN-A-231 NUDOCS 7908130275 | |
| Download: ML19247B714 (2) | |
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SCOPE OF WORK ELECTRICAL, INSTRUMENTATION AND CONTROL SYSTEMS SUPPORT TASK 1: Electrical Bypass of Safety Actuation Sicnals to Containment Purge Valves f
Scope
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The objective of this task is to provide followup action of a recent abnormal occurrence involving the iaadvertent i
blocking of the automatic safety injection actuation signal from closing containment purge isolation valves during a postulated LOCA. Blocking of the signal was caused by design deficiencies of the manual override circuitry, which was operated during a "high" radiation condition inside containment.
The scope of the task for the contractor is to provide technical assistance for the review of ESF actuation signal circuits which have m.anual override (bypass) capability.
The acceptance criteria are given in IEEE Std. 279 and in the D0R generic letter to
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all licensees dated November 28, 1978. Written technical evaluations by the contractor will be required.
This task involves the licensing action review of over 50 operating reactors.
This effort will be started in FY 1979, with completion in FY 1980.
A number of plant visits by NRC and contractor personnel are planned.
Lead Engineer:
J. T. Beard (NRC)
TASK 2: End-of-Cycle Recirculation Pumo Trip Circuitry Scope BWR licensees have requested safety credit for a recirculation pump trip (RPT) feature needed to recover a loss of thermal margin (and operating power level) which occurs at the end of fuel cycles.
Due to certain turbine-generator transients a core-wide pressurization event can at end-of-cycle add positive reactivity to the reactor system at a rate faster than the control rods c7.n insert negative scram reactivity.
As an essential supplement to the scram system, the RPT feature provides the additional negative reactivity.
The scope of the task for the contractor is to assist the staff and to provide technical assistance in the review of the proposed ROT circuit designs based on the criteria in IEEE Std. 279. Written technical evaluations '.re required and iavolve licensing actions for all SWR's 25 units).
This effort will be started in FY 1979, with completion in FY 1980.
Lead Engineer:
J. T. Beard (NRC) g 3
7908130 77 7
N R C e,o m u 173 v s Nucts Am.mt GutATom v couviss.os omot a NvusE a t2 781 20-79-117
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STAND ARD ORDER FOR DOE WORK June 14, 1979 ISSU50 TO: ID O E C'f cel ISSUED BY: (NRC Of fical ACCOUNTING CITATION
- ^"5 San Francisco Operations Office of Nuclear Reactor
'1Yn'no 9no Office Regulation BA R NUM B L R PERFORMING ORG ANi2ATION AND LOCATION 20.10 0d.01-1 Lawrence Livermore Lab An?31 0 WORK PERICO. THis ORDE R FIN TITLE fixed C
' ESTIM ATED O Electrical, Instrumentation and Control Systems Support 10/1/$8 h30/79 OSLlG ATION AVAILABILITY PROVIDED BY:
A.
THIS OROER S 60,(1Q0 8.
TOT AL OF OROERS PL ACEO PRIOR TO THIS DA TE WITH TME PERFORMING
'M "N3% e ^"!,in'"8a' ^n o~ 5"So'" ^~o ""' a5"oua o*" o' m e 1.522,000 5
E C. TOTAL OROERS TO DATE (TOTAL A & B) 1,582,000 D. AMOUNT INCLUOED IN "C" APPLICA8LE TO THE " FIN NUMBE R" CITED IN THIS ORCE R.
S 497.000 FINANCI AL FLEXIBILITY:
@3FUNOS WILL NOT BE REPROGRAMMED BETWEEN FINS. LINE D CONSTITUTES A LIMITATION ON 08 LIGATIONS AUTHO RIZ E C.
O FUNDS MAY SE REPPOGRAMMEO NOT TO EXCEED 210% OF FIN LEVEL UP TO SSOK. LINE C CONSTITUTES A LIMITATION ON OBLIGATIONS AUTHORIZEO.
STANDARD TERMS AND CONDITIONS PROVIOEO COE ARE CONSIDERED PART OF TMIS CROER
- UNLESS OTHERWISE NOTED.
ATT ACH ME NTS:
THE FOLLOWING ATTACHMENTS ARE HE RESY SECURITY:
MADE A PART OF THlh OROER.
O WORK ON THl3 ORDER 15 NOT CLASSIFIED.
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O STATEMENT OF WDR K O WORK ON THis OROER INVOLVES CLASSIFIED C ADOITIONAL TERMS AND CONOITIONS INFORMATION. NRC FORM 187 IS ATTACHED.
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@ OTHER REMARKS.
After signature, please send a copy of this order to M. Paulette Triplett, NRR P-428 l
!Ssuf M AUTMORITY l
ACCEPTING C AGANIZATION i
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SIGN A f um(
SIG N A Tu m E O
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TITLE Ti t L E 5/M/7f Fiscal Assistant NRC FORM 173 (: 73) t
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