ML20054J974

Offnormal Event Procedure 05-1-02-II-2, Offgas Activity High,Safety-Related, Revision 10

ML20054J974
Person / Time
Site:	Grand Gulf
Issue date:	03/19/1982
From:	MISSISSIPPI POWER & LIGHT CO.
To:
Shared Package
ML20054J949	List: AECM-82-280, Forwards 37 Offnormal Event Procedures in Response to ACRS Subcommittee Request at 810917-18 Meeting ML20054J952 ML20054J953 ML20054J963 ML20054J965 ML20054J968 ML20054J971 ML20054J972 ML20054J974 ML20054J975 ML20054J979 ML20054J980 ML20054J982 ML20054J983 ML20054J986 ML20054J990 ML20054J992 ML20054J993 ML20054J996 ML20054J998 ML20054J999 ML20054K001 ML20054K004 ML20054K008 ML20054K009 ML20054K012 ML20054K013 ML20054K016 ML20054K019 ML20054K021 ML20054K024 ML20054K026 ML20054K030 ML20054K031 ML20054K033 ML20054K034 ML20054K036 ML20054K039 ML20054K040
References
05-1-02-II-2, 5-1-2-II-2, NUDOCS 8206300254
Download: ML20054J974 (2)

Text

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PLANT OPERATIONS MANUAL g

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volume 05 05-1-02-11-2 Section 02 Revision:

10 Date: 3-19-82 j

OFF-NORMAL EVENT PROCEDURE OFF GAS ACTIVITY HIGH SAFETY RELATED

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Prepared:

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Nuclear Planul Qualit/ Superintendent V Tei:hnical Review Reviewed:

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i List of Ef fective Pages:

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Revis ion:

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.ss GRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE l

Title:

Of f Cas Activity High lNo.:

05-1-02-11-2 l Revision: 10 iPage: 1 1

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l 1.0 PURPOSE / DISCUSSION 1.1 To provide instructions to the operator in the event of high or increasing activity La the Of f Gas System.

1.2 This procedure may interface with the Emergency Plan.

1.3 Condenser off gas high radiation may be indicative of a fuel element failure and fission product release. This procedure covers the period

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from the discovery of an increasing Off Gas Activity, to the entrance into the emergency plan and a resulting plant shutdown if necessary.

j 2.0 SYMPTOMS 2.1 Increasing activity in the reactor vessel water samples.

2.2 Increasing main steam line radiation monitor readings.

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2.3 Increasing off gas pretreatment radiation monitor readings.

2.4 Increasing off gas post-treatment radiation monitor readings.

2.5 Annunciators,. High or High-High, on any of the above monitors.

3.0 AUTOMATIC ACTIONS

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3.1 If the main steam line radiation monitor reaches 2.5 times normal background, the reactor will scram and a Group I isolation will occur.

3.2 If the of f gas post-treatment radiation monitor reaches the High-High-High setpoint, the following valves will close, isolating the off gas train:

3.2.1 IN64-FV-ET)60, OFF GAS DISCHARGE TO VENT.

3.2.2 F054, PREFILTER INLET DRAIN.

i 3.2.3 F034A(B), CONDENSER DRAIN.

3.2.4 F023, HOLDUP LINE DRAIN.

4.0 IMMEDIATE OPERATOR ACTIONS 4.1 Verify the appropriate automatic actions have occurred.

4.2 If the reactor scrammed, carry out actions of ONEP 05-1-02-1-1, Reactor Scram.

If MSIV closure occurred, enter EP-1, Level Control.

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