ML20138B253

Proposed Tech Specs,Revising Calibr of Portable Gamma & Neutron dose-rate Measuring Instruments

ML20138B253
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	10/09/1985
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML20138B251	List: ML20138B245 ML20138B253
References
NUDOCS 8510150303
Download: ML20138B253 (2)

Text

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i-ATTACHMENT Consumers Power Company Big Rock Point Plant Docket 50-155 4-t 1

PROPOSED TECHNICAL SPECIFICATION PAGE CHANGES October 9., 1985 L

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, RM*2188R8t&8h PM P

IC1085-0303-NLO4

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6.4.2 (Contd)

(c) The containment atmosphere shall be monitored by two high range c gamma monitors. The_ monitors are designed to measure gamma f

. radiation in containment under accident conditions from 1 R/hr 4 to 1E+06 R/hr. The monitors are located external to the  !

containment sphere. The readouts of the monitors are located in j t

the control room.

Both.high range containment atmosphere gamma monitors.shall i normally be in service during power operation. If either g monitor is inoperable.. restore to operable status within  :

I 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or, in lieu of any other report required by }

Specification 6.9.2 (administrative controls), prepare and l submit a Special Report to the Commission pursuant to ,

i Specification 6.9.3 (administrative controls) within the next .

.30 days outlining the cause of the inoperability and the plans i for restoring.the system to operable status. A channel check j shall be performed for each monitor at least once per month, and a j channel calibration shall be performed at each refueling outage.

l The channel calibration for all ranges above 10R/hr may be

. performed by electronic. signal substitution.

(d) Portable gamma dose-rate measuring instruments and portable neutron dose-rate measuring instranents shall be provided for l

establishing permissible working Itaits. - These instruments shall be calibrated at least once every three months.

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j 6.4.3 Reactor Water Level Monitors in the Reactor Depressurization System i .

} Four narrow range water level monitors are provided in the main control room as part of the Reactor Depressurising System to be used for detection of adequate core cooling during accident situations.

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'At least two reactor water level indicators in the Reactor ,

l Depressurization System shall be operable during power operation.  :

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' Proposed

-TSB1085-0303-NL04- l

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