05000335/LER-1980-039-03, /03L-0:on 800814,dose Equivalent Iodine Exceeded Tech Spec 3.4.8a Limit.Caused by Dropped Control Element assembly.I-131 Level Decreased to Nominal Levels After 96-h

/03L-0:on 800814,dose Equivalent Iodine Exceeded Tech Spec 3.4.8a Limit.Caused by Dropped Control Element assembly.I-131 Level Decreased to Nominal Levels After 96-h

ML17266A373
Person / Time
Site:	Saint Lucie
Issue date:	09/15/1980
From:	Pace P FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17209A419	List: 05000335/LER-1980-039, Forwards LER 80-039/03L-0 05000335/LER-1980-039-03, /03L-0:on 800814,dose Equivalent Iodine Exceeded Tech Spec 3.4.8a Limit.Caused by Dropped Control Element assembly.I-131 Level Decreased to Nominal Levels After 96-h
References
LER-80-039-03L, LER-80-39-3L, NUDOCS 8012100479
Download: ML17266A373 (7)

LER-1980-039, /03L-0:on 800814,dose Equivalent Iodine Exceeded Tech Spec 3.4.8a Limit.Caused by Dropped Control Element assembly.I-131 Level Decreased to Nominal Levels After 96-h

Event date:
Report date:
3351980039R03 - NRC Website

text

NRC PORM 344 I7.77 I LICENSEE EVENT REPORT U. S. NUCLEAR REOULATORY COMMISS'ION I

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50 EVENTOESCRIPTION AND SRQSABLE CONSEQUENCES Qlo Durin a short (12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />) maintenance shutdown, while in a startup

mode, dose equivalent iodine (DE/) exceeded T.S. 3;4.8.a limit of 1.0IICi/gram DE I-131.

The DE iodine was first measured above this limit at 0320 s

on 8-14-80 and remained above the limit for a roximatel 8.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

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14 40 41 41 44 47 CAUSE OPSCRIPTION ANO CORRECI'IVE ACTIONS Q27 o

After an extended eriod of ower o eration with a nominal level of fuel

leakage, a dropped CEA (LER 335-80-38, CEA I/7), and the plant shutdown for f

a sien s to cause iodine build-u

~iodine splkin henomenon).

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1.0IICi/ ram after 8.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> and to nominal levels after 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br />.

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REPORTABLB OCCURRENCE 335-80-39 LICENSEE EVENT REPORT PAGE 2 SUPPLElKNTARY INFO[NATION TECHNICAL SPECIFICATION REPORT DOSE E UIVALENT IODINE Reactor ower histor startin 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> rior to the first sam le in which the limit was exceeded.

DATE 8-12-80 8-13-80 8-13-80 8-13-80 8-13-80 8-13-80 8-13-80 8-13-80 8-13-80 8-13-80 8-14-80 8-14-80 8-14-80 8-14-80 TIHE 03:00'4:OOJ 15:00 16:00 17 00 18 00 19:00 21:00~

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See Attachment "A" 3.

Clean-u flow histor startin 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> rior to the first sam le in which the limit was exceeded.

Purification flow was a constant 80 GPH for the entire 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period. prior to exceeding, the DEQ iodine limit.

4.

~Hister of de assin o aration it an startin 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> rior to the first sam le in which the limit was exceeded.

There were no degassing operations during the 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> prior to exceeding the DEQ iodine limit.

5.

The time duration when the s ecific activit of the rimar coolant exceeded 1.0 Ci/ ram dose e uivalent I-131.

DEQ iodine exceeded 1.0pCi/gram for approximately 8.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

REPORTABLE OCCURRENCE 335-80-39 LICENSEE EVENT REPORT

~PAGE 3 RESULTS OF COOLANT SPECIFIC ACTIVITY ANALYSIS gCiIt ram}

DATE 8-13-80 8-13-80 8-13-80 8-14-80 0905 1400 1515 1715 0320 0400 0453 0745 0952 1155 1400 1-131 2-132 0.7144 0.8044 1.136 1.065 0.8939 0.8283 0.2256 0.2234 0.2621 0.1646 0.1119 0.0951 Dropped CEA 87 1-133 2.169 0.6963 1.910 0.8874 1.828 0.6375 I-135 0.2362 0.2550 0.3403 0.2631 0.1697 0.1320

~DE 0.0768 0.105 0.152 1.317 1.021 1.69 1.332 1.406 1.015 0.88 Q

DEQ iodine continued decreasing and stabilized at approximately 0.025 pCi/gram on 8-18-80.

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