ML20054J968

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Offnormal Event Procedure 05-1-02-I-5, Resin Intrusion Into Reactor Vessel,Safety-Related, Revision 11
ML20054J968
Person / Time
Site: Grand Gulf  Entergy icon.png
Issue date: 06/12/1982
From:
MISSISSIPPI POWER & LIGHT CO.
To:
Shared Package
ML20054J949 List:
References
05-1-02-I-5, 5-1-2-I-5, NUDOCS 8206300248
Download: ML20054J968 (4)
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  • PLANT OPERATIONS MANUAL I

Volume 05 05-1-02-I-5 Section 02 Revision: 11 Date: 6-12-82 i

0FF-NORMAL EVENT PROCEDURE RESIN INTRUSION INTO THE REACTOR VESSEL SAFETY RELATED

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' Reviewed: W Nuclear Plant Quality sup'erinteddent 9 Technical Review Approved:

h, Opera .ons uperinten ent Concurrence: ,

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List of Effective Pages:

Page:

1-3 List of TCN's Incorporated:

Revision TCN No.

10 None 11 None 8206300248 820625 PDR ADOCK 05000416 P PDR

.- ORAND CULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE

Title:

Resin Intrusion Into The No.: 05-1-02-I-5 Revision: 11 Page: 1 Reactor Vessel 1.0 PURPOSE / DISCUSSION 1.1' The purpose of this procedure is to describe the actions to be taken in the event resin is injected into the reactor from either the Condensate Cleanup System or the Reactor Water Cleanup System (RWCU).

1.2 This procedure may interface with the Emergency Plan since a reactor scram and ECCS initiation are possible. This procedure may also interface with one or more of the Emergency Procedures.

1.3 Resin may be injected into the reactor from either the RWCU filter-demineralizers (F/D) or the condensate filters or demineralizers.

In either case the results are the same. The resin intrusion will cause water conductivity and activity to increase substantially while pH decreases substantially. Depending upon the amount and rate of resin injected, these changes may become detectable immediately or only after several hours. The most serious injection could cause a rapid change in vessel chemistry resulting in a large release of nitrogen-16 into the steam lines, causing a steam line high radiation scrum and MVIS isolation. Care shoul4_ht exercised to ensure a. main steam.line.

  • radrition trip is not the result of a fissdE' product release, caus'e3'by a ~ t fuel element failure.

SYMPTOMS .. ..;, '

2.1 An unexplained increase in heactor water conductivity accompanied by a very low pH. -

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2.2 'hn unexplained increase in reactor water activity.

2.3_[An unexpl.ained decrease in reactor . power (due . to increased. surface tension of the water). .

.' 2.4 An unexplained increase in levels _.on the MSL. RAD monitors, and .possibly

. . _ , . _ . . .the OFF GAS RAD monitors. .-~. a - . . .~ -- - - -

~ ~ ~[ ' 2.5_,_An unexplained change in condensate o'rI RWCU F/D_ parameter, particularly flow or dp. .

2.6 One of more of the the following control room annunciators:

2.6.1 REACTOR RECIRC HIGH-LOW CONDUCTIVITY 2.6.2 FILTER' DEMIN TROUBLE CONT 2.6.3 CONDENSATE DMNRLZER SYSTEM TROUBLE 2.6.4 RFP DISCHARGE CONDUCTIVITY HICH 2.6.5 CONDENSER DMNRLZR COMB EFL CNDCT HIGH 2.6.6 00NDENSER PUMP DISCHARGE CNDCT HIGH

- GRAND CULF NUCLEAR STATION OFF-MORMAL EVENT PROCEDURE

Title:

Resin Intrusion Into The JNo.: 05-1-02-I-5 Revision: 11 Page: 2 Reactor Vessel l 2.6.7 MSL Rad High 2.6.8 MSL A/D or B/C Rad Hi Hi/Inop 2.6.9 RWCU FLTR DMIN EFF CNDCT HI/LO 2.7 The following local annunciators:

2.7.1 STRAINER "A" DIFF PRESS HI (IG36-P002) 2.7.2 STRAINER "B" DIFF PRESS HI (IG36-P002) 2.7.3 "A" CONDUCTIVITY HI (1G36-P002) 2.7.4 "B" CONDUCTIVITY HI (lG36-P002) 2.7.5 COND DEM POST STR DIFF PRESS HIGH (A-H) (IH22-P474) ft 2.7.6 COND DEM EFFLUENT CONDUCTIVITY HIGH (A-H) (1H22-P474)

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3.0 AUTOMATIC ACTIONS '- - k

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3.5 Possible Reactor Scram and' MSIV Isolation on MSL HIGH RAD.

-' 4.0 IMMEDIATE OPERAT0[ ACTIONS .

4.1 If Reactor Scram and MSIV Isolation occurred, refer to ONEP 05-1-02-I-1 Reactor Scram, and EP-1 Level Control.

4.2 Notify the Shif t Supervisor / Superintendent and Chemistry.

I 4.3 Obse rve the Off Gas Pre-Treatment Radiation Monitor on panel 1H13-P600.

, , , , Refer to ONEP 05-1-02-II-2, Off Cas Activity High, if necessary.

[,~, 5.0 SUBSEQUENT ACTIONS ,,,,.._ _ _ _ _ . . _ . ._

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5.1~ Proceed to implement the Emergency Plan if necessary, as directed by the Shift Supervisor / Shift Superintendent.

5.2 Reduce reactor power to slow the rate of Conductivity / Activity increase.

5.3 Check Condensate /Feedwater Conductivity and refer to ONEP 05-1-02-V-12, Condensate High Conductivity if necessary.

5.4 Attempt to determine the source of the resin by observing RWCU and Condensate F/D's , and Condensate Deep Bed Demineralizer Parameters.

Check the records on each for anything recently logged cut of the ordinary.

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! . SRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE

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Title:

Rasin Intrusion Into The No.: 05-1-02-I-5 Revision: 11 Page: 3  ;

I Reactor Vessel 5.5 Re fer to Tech. Specs . 3/4.4.4, Reactor Coolant System Chemistry, for operating limits.

, 5.6 Continue to monitor MSL Radiation and Off Gas Radiation Instrumentation.

l 5.7 If it can be determined that the resin is not (or no longer) coming from the RWCU System, place all available RWCU F/D's service, and begin rejecting reactor water to the condenser.

i' 5.8 As Condensate F/D's and Deep Bed Demineralizers are found not to be the source of resin, place them in service, monitor vessel chemistry indications and take samples to ensure pH, conductivity, and activity are returning to normal.

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! 5.9 If conditions return to normal and Tech. Specs. are complied with, continue operating in accordance with the appropriate IOI, or else

continue to shutdown in accordance with 10I 03-1-01-3, Plant Shutdown.,r

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