ML20214N703

Proposed Tech Specs,Changing Table 4.2.G, Min Test Frequency for ATWS Rpt/Ari Instrumentation & 4.2 Bases

ML20214N703
Person / Time
Site:	Pilgrim
Issue date:	05/20/1987
From:	BOSTON EDISON CO.
To:
Shared Package
ML20214N693	List: BECO-87-087, Application for Amend to License DPR-35,consisting of Proposed Change 87-07,changing Table 4.2.G, Min Test & Calibr Frequency for ATWS Rpt/Ari Instrumentation & 4.2.G Bases ML20214N703
References
NUDOCS 8706030023
Download: ML20214N703 (2)

Text

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PNPS Table 4.2.G Minimum Test and Calibration Frequency for ATHS RPT/ARI Instrumentation Instrument Instrument Functional Instrument Channel Test (2) Calibration (2) Check (2)

1. Reactor High Pressure (1) (7) (7) Once/ day

2. Reactor Low-Low Hater (1) (7) (7) Once/ day Level l

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Amendment No. 66b

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B706030023 870520 PDR ADOCK 05000293

P PDR x

4.2- BASES (Cont'd)

The_ automatic pressure relief instrumentation can be considered to be a 1 out of 2 logic system and the discussion above applies also.  ;

The instrumentation which is required for the recirculation pump trip and alternate rod insertion systems incorporate analog transmitters.

The transmitter calibration frequency is once per refueling outage, which is consistent with both the equipment capabilities and the requirements for similar equipment used at Pilgrim. The Trip Unit Calibration and Instrument Functional Test is specified at monthly, which is the same frequency specified for other similar protective devices. An instrument check is specified at once per day; this is considered to be an appropriate frequency, commensurate with the design applications and the fact that the recirculation pump trip and alternate rod insertion systems are backups to existing protective instrumentation.

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l Amendment No. 77

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