ML20054J972

Offnormal Event Procedure 05-1-02-II-2, Offgas Activity High,Safety-Related, Revision 11

ML20054J972
Person / Time
Site:	Grand Gulf
Issue date:	06/12/1982
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 8206300252
Download: ML20054J972 (3)

Text

-. ____ -_______ _ __

. ., f . , ,

PLANT OPERATIONS FANUAL Volume 05 ,

05-1-02-II-2 Section 02 kevision: 11 Date: 6-12-82 OFF-NORMAL EVENT PROCEDURE OFF CAS ACTIVITY HIGH SAFETY RELATED

/

~~ ~

Prepared: -- _ 472 _ , , * - - ' ' _' I ' * ~ i -

~~

" Reviewed: / /- 4h' -

,_ Nuclear Plant Quality 'Superintdndent ' ' Technical Review Approved: M$

~ - - - -

6pe ratiojt a Superintendent - - - - -

Concurrence: -

Assistanf Plaint Nanaf '~'

PSRC: / g//f/Fc

< u -- ,,

. .. .. ,..( . .

List of Effective Pages: .. .' ;.. . i 6 . . . --

Page: - *

• l-2 List of TCN's Incorporated:

Revision TCN No.

. 10 None 11 None 8206300252 820625 PDR ADOCK 05000416 p PDR ,

< GRAND CULF NUCLEAR STATION

• .. OFF-NORMAL EVENT PROCEDURE

Title:

Off Cas Activity High No.: 05-1-02-11-2 P.evis ion : 11 Page: 1 1.0 PURPOSE / DISCUSSION 1.1 To provide instructions to the operator in the event of high or increasing activity in the Off Gas System.

1.2 This procedure may interface with the Emergency Plan.

1.3 Condenser of f gas high radiation may be indicative of a fuel element failure and fission product release. This procedure covers the period from the discovery of an increasing Off Gas Activity, to the entrance I

into the emergency plan and a resulting plant shutdown if necessary.

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

2.2 Increasing main steam line radiation monitor readings. ft 2.3 Increasing off gas pretreatment radiation monitor readings.

_ . .. . - ~ . - -

2.4_ Increasing off gas post-treatment radiatiod"bonitor readings.

', Z2" h

• 2.5 Annunciators, High or High'~Eigh, on any of the above monitors.

~

3.0 AUTOMATIC ACTIONQ .

~

3.1~ If the main steam line radiation monitor reaches 3.0 times normal background, the reactor will scram and a Group I isolation will occur.

~

I'f' the of f gas pos t-treatment radiation monitor reaches the~

~

3.2 $

High-High-High setpoint, the following valves will close, isolating the

. .off gas train: _

3.2.1 IN64-FV-F060, 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 app opriate automatic actions have occurred.

4.2 If the reactor scrammed, carry out actions of ONEP 05-1-02-I-1, Reactor Scram. If MSIV closure occurred, enter EP-1, Level Control. -

1 e

, GRAND GULF HUCLEAR STATION OFF-NORMAL EVENT PROCEDURE

Title:

Off Gas Activity High No.: 05-1-02-II-2 Revision: 11 Page: 2 I

4.3 Reduce power using recirculation pumps in step changes as per power and flow limitation to lower of f gas pretreatment and main steam line radiation levels below the alarm setpoint.

4.4 Contact chemistry to draw an off Fas sample and reactor vessel sample.

4.5 Notify Health Physics of the increasing readings or alarms.

5.0 FUBSEQUENT ACTIONS 5.1 Proceed to implement the Emergency Plan if directed by the Shift Supervisor or Shift Superintendent.

5.2 kfareductioninpowerdoesnotcauseadecreaseinoffgaspretreatment equilibrium activity, the reactor should be manually scrammed to prevent reaching the main steam line radiation monitor high setpoint and Greup I isolation. This will prevent'the more severe transient caused by the isolation.

5.3 If off gas pos t-treatment .tadiation levels are.below th.e .High-High . ,

- s'etpoint and the reactor is still operating 7, operation may continue 'to 1 allow the Reactor Engineers to perform an evaluation to determine the location of the faulty fuel.

5.4 If it can be determined that the problem is not related to fuel failure, increase power in' accordance with IOI 03-1-02-2, Power Operation, as

.-- desired.

5.5 If off gas or reactor coolant samples exceed Technical Specification Sections 3.4.4 Reactor Coolant Sys tem Chemist ry, or 3.11.2.1 Gaseous Effluents, shutdown the reactor if req'uired in accordance with 101 03-1-01-3, Plant Shutdown.

5.6 Verify the RWCU System is operating properly.

$~^ ~

57f If a Group 1 isolation occurs, from main steam line radiation monitor reaching 3.0 times normal background, keep MSIV's closed if fuel failure is evident. Do not start the mechanical vacuum pumps to prevent the loss of condenser vacuum, since they release directly to the Turbine Building roof. Refer to ONEP 05-1-02-V-8, Loss of Condenser vacuum.

4

_ - - _ _ - _ - _ . _ _ _ _ - - _ _ _ _ _ _ _ _ . . _ _ _ - _ - __ . _ - _ _ _ _ _ - - _ _ _ _ . - - _