ML20214Q816

Rev 1 to OP-AB.ZZ-121(Q), Failed Open Safety/Relief Valve

ML20214Q816
Person / Time
Site:	Hope Creek
Issue date:	03/14/1986
From:	Connor G, Karpe E, Webb F Public Service Enterprise Group
To:
Shared Package
ML20214Q810	List: ML20214Q807 ML20214Q816
References
NUDOCS 8706050203
Download: ML20214Q816 (3)

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. . .. ATTACHMENT 2 OP-AB.ZZ-121(Q) I F. He b A 5 [0 1/WK ORLn Alls 4Site La of At n-o. icy Preparer / Da te 'S pt / D6 t(e OE/Date ALARA/ Da'te Eng./Date t14 Lhop WoNg f/14"pjg EC-647 M '"^ -

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1 FAILED OPEN SAFETY / RELIEF VALVE 1.0 SYMPTOMS 1.1 Alarms

a. ADS / SAFETY RELIEF VLV NOT CLOSED

b. SUPPR. POOL TEMP HI 95*F 1.2 OPEN indication on the safety relief valve (SRV) and/o_r its associated acoustic monitor.

1.3 Decreased generator output 1.4 Failure of the turbine bypass valves to return to their original positions, M open.

1.5 Increasing suppression pool temperature 1.6 SRV tail pipe temperature increasing 1.7 Change in indicated steam flow 2.0 AUTOMATIC ACTIONS 2.1 None 3.0 IMMEDIATE OPERATOR ACTIONS CD-912X 3.1 DEPRESS the appropriate SRV OPEN and CLOSE pushbuttons, CD-220C .and repeat several times as necessary, in an attempt to reclose g reseat the SRV.

3.2 REDUCE the reactor recirculation pumps to ininimum speed.

CD-912X 3.3 M the SRV does not properly close within 2 minutes or CD-2 20C i_f, suppression pool average water temperature is 1109 TS 3.4.2.1.b og greater, place the reactor mode switch in the Shutdown position and implement procedure OP-EO.ZZ-100.

( 0706050203 870602 h0R ADOCK 05000354 PDR Re v . I l OP-AB.ZZ-121(Q) 1

OP-A3.33-121(Q)

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4.0 SUBSEQUENT OPERATOR ACTIONS 4.1 Ensure t. hat all appropriate immediate operator _ actions are complete. <

C D-912X 4.2 Ensure the SRV has closed by the following applicable C D-220C indications:

a. CLOSED light indication on the'SRV position and/or --

acoustic monitor panels.

b. turbine bypass valves return to their original positions

c. generator load increases to the original output

d. SRV tail pipe tenperature decreasing

e. Suppression pool temperature stops increasing

f. ADS / SAFETY RELIEF VLV NOT CLOSED alarm resets TERMINATE all venting oj; purging of the suppression 4.3 chamber. ,

cD-220C 4.4 START suppression pool cooling and monitor the- l i suppression pool temperature, if at_any time the 5  ;

average water temperature is equal to or greater than 95'F refer to Technical Specifiestion 3T6.2.1.b.

4.5 Ensure prcper operation of the Instrument Gas System.

4.6 Demonstrate the suppression Chamber /Drywell Vacuum Breakers operable within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> af ter any discharge of steam to the Suppression Chamber from the SRV's.

C D- 220C 4.7 If one or more relief valves f ails to reset properly, or if discharge was for an extended period of time, then contact Maintenance Department to perform a visual internal and external inspection of supression pool structure.

TS 4.6.2.1.c 4.8 An external visual examination of the suppression chamber shall be made af ter safety / relief valve operation with the suppression chamber average water temperature greater than or equal to 177'F and reactor coolant system pressure gWater than 100 PSE i

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, ,,. OP-AB.ZZ-121(Q) 5.0 DISCUSSION 5.1 This transient does result in the discharge of coolant activity to the suppression pool. The Senior Nuclear Shif t Supervisor can chooso to leave the activity bottled up within the containment or release the activity in accordance with Technical Specification limits.

5.2 Following a reactor scram and subsequent pressure decrease it maybe possible to close the SRV by periodically attempting to cycle the SRV.

5.3 Excessive instrument gas pressure could cause the SRV to inadvertently open.

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