05000255/LER-1982-037-03, /03L-0:on 821017,primary Coolant Sys Sample Revealed Dose Equivalent I-131 Exceeded Tech Spec Limits. Caused by Secured Purification Demineralizers Following Plant Trip on 821016.Flow Restored

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/03L-0:on 821017,primary Coolant Sys Sample Revealed Dose Equivalent I-131 Exceeded Tech Spec Limits. Caused by Secured Purification Demineralizers Following Plant Trip on 821016.Flow Restored
ML20028B355
Person / Time
Site: Palisades Entergy icon.png
Issue date: 11/16/1982
From:
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20028B350 List:
References
LER-82-037-03L, LER-82-37-3L, NUDOCS 8211300315
Download: ML20028B355 (4)
v • d • e


LER-1982-037, /03L-0:on 821017,primary Coolant Sys Sample Revealed Dose Equivalent I-131 Exceeded Tech Spec Limits. Caused by Secured Purification Demineralizers Following Plant Trip on 821016.Flow Restored
Event date:
Report date:
2551982037R03 - NRC Website
v • d • e

text

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PALISADES PLANT - LER 82-37 License DPR-20 Docket 50-255 NRC poRas aos u.s. NUCLEAR REGULATORY ConMlSSION 87 773 LICENSEE EVENT REPORT e@

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et EvtNT. ATE 74 75 REPORT oATE 80 EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h num l During plant startup, PCS sample revealed dose equivalent i

iodine 131 to be 2.21 microcuries per gram, which exceeds the o

F5T 1 1 1.0 microcurie per gram limit of TS 3.1.h.

Out of specification rgT-} l condition lasted approximately 37 hours4.282407e-4 days <br />0.0103 hours <br />6.117725e-5 weeks <br />1.40785e-5 months <br />.

No threat to public g

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Condition reportable per TS 6.9 2.b(2).

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40 en 42 43 as 47 CAUSE DESCRIPTION AND CORRECrtVE ACTIONS l Normal iodine level increase following plant trip on 10-16-82 was aggravate 4 i o by purification demineralizers being secured.

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10-lh due to boron equalization problems. Purification flow restored on 10-17 with iodine cleanup complete on 10-18.

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A*+ % to Licensee Event Report 82-37 Page 1 Ch w.rers Power Ompany Palimadas Plant Docket 50-255 On M h r 14, 1982, with the zeector at 99.8% power, a Primary Coolant System (PCS) saple showed a lithiun cenaentration of 1.9 ppn. 'Ib avoid ewing the administrative limit of 2.0 ppu, the lithiatig danineralizer, T-51B, was zuoved frm servim and an atter:pt was made to place the delithiating denineralizer, T-51A, in servim. 'Ihe T-51A effitent and PCs baron concentrations failed to egmliw and T-SIA was ruoved frm arvim. Another attenyt to place T-51A in servi on October 14 tes un=M.

On och 16, at 0325, the plant tripped due to a low steam generator lew1.

A &:ee equivalent iodine level of 0.71 uCi/gm was measumd at 0708. 'Ihe plant ws taken critim1 ard trought on line at 0550 on Octe*er 17. At 0918 during power escalation a dose equivalent dodine aa:ple showed 2.2 uCi/p. Iodine cbse analyses were otmneocad at four hour intervals as required by Table 4.2.1 of Technimi Specifimtions. At 1430 the lithiating denineralim, T-51B, was plama in service with an 80 gpm flow rate. At 0124 on October 18, dose equivalent lodine level was below the Technical c acification limit of 1.0 tri/p.

r During a Irview of the event, a data entry error was found in a rejected iodine analysis ;

I-- d at 1300 on G&im 16. leen the error was corrected, the analysis showed a dose equivalent iodim level of 1.2 uti/p. Consequently, the dose equivalent iodine level errwaaa the Ta::hnical specification limit of 1.0 uCi/p for awzoxinately 37 tours.

With purifimtion dsunineralimrs in servim, it is normal to experience a sua11 increere in the &.a equivalont irrline level after a plant shutdown. As a result of escuring the deninrinlizers, however, a nuch larger iodine level increase occurred. 'm prevent recurrence, the event will be reviewed with the chemistry and operations i-A-c.1.

'rbe following data is provided in anmnianm with Technical Spw ifimtion 3.1.4.e.

1.

Sa:ple Results Date/ Time Activity (uci/p) 10/16 0708 0.71 10/16 1300 1.2 10/17 0918 2.2 l

10/17 1320 2.1 10/17'1720 1.7 10/17 2120 1.25 l

10/18 0124 0.94 i

Attactsnent to Tinen* Event Aeport 82-37 Page 2 Cbnmentra %wer Ocupany Palinarice Plant Dodet 50-255 2.

Power History From 7b Pcuer Invel 10/14 1300 10/16 0324 99.8%

10/16 0324 10/17 0550 0.0%

10/17 0550 10/17 0635 0 - 25% (power escalation) 10/17 0635 10/17 0918 25%

3.

Ptml Burnup by (bre Region see attacted report 4.

Cleanup F1w Fit tory Frun To Flw (czn) 10/14 0815 40 10/14 0815 10/17 0918 0

M aacing Operation History 5.

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!b degansing ws pericuuud during the 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> prior to the event.

6.

Duration The specific activity of the primary coohnt exmeded 1.0 uti/gn dose equivalent iodine 131 for appronmately 37 hours4.282407e-4 days <br />0.0103 hours <br />6.117725e-5 weeks <br />1.40785e-5 months <br />.

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