ML20138B641

Proposed Update to Tech Spec Change Request 141,permitting Defeat of Trip During Low Power Physics Tests

ML20138B641
Person / Time
Site:	Three Mile Island
Issue date:	12/10/1985
From:	GENERAL PUBLIC UTILITIES CORP.
To:
Shared Package
ML20138B639	List: ML20138B634 ML20138B641
References
NUDOCS 8512120347
Download: ML20138B641 (1)

Text

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{ Table 3.5-1 Continued *

.s INSTRUMENTS OPERATING CONDITIONS .

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(A) (B) (C) i 3l Functional Unit Mininum Operable Minimum Degree Operator Action if Conditions

? Channel s of Redundancy of Column A and B Cannot be Met M

A. R actor Protection System (Cont'd.)_

9. Power /nunber of pumps 2 1 Maintain hot shutdown instrument channels

10. High reactor building 2 1 Maintain hot shutdown pressure channels (a) For channel testing, calibration, or mintenance, the minimum number of operable channels my be two and a degree of redundancy of one for a eximum of four hours.

(b) When 2 or 4 power range instrument channels are greater than 10 percent full power, hot shutdown is not required, w (c) When 1 or.2 intermediate range instrument channels is greater than 10-10 amps, or 2 of 4 power range instrument g channels are greater than 10 percent full power, hot shutdown is not required.

, B. Other Reactor Trips

1. Loss of Feedwater 2(a)(c) 1(a)(c) Maintain less than 7% indicated reactor power.

2. Turbine Trip 2(b)(c) 1(b)(c) Maintain less than 20% indicated reactor power.

(a) Bypass of the feedwater pump trip signal my be placed in effect when indicated reactor power is less than 7%.

The bypass will be removed when reactor power is raised above 7%.

(b) The main turbine trip bypass my be placed in effect when indicated reactor power is less than 20%. The bypass will be removed when reactor power is raised above 20%.

(c) Trip my be defeated during low power physics tests.

DOC [$jg10 ~

REP

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