ML17266A373

LER 80-039/03L-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

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: ML17209A418 ML17266A373
References
LER-80-039-03L, LER-80-39-3L, NUDOCS 8012100479
Download: ML17266A373 (7)

Text

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~O I 5 40 oi' 41 QQClCET NUM4CR Gl 44 44 CVCNT O*TC IS ACIQAT QA 4 50 oe 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 />. The 0 lj o ai inforlnation re uired b T.S. 3.4.8.d. This is

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wmS 41 SurrUCA Mir 44 uAVurACTUACA 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 1-131 level decreesed to below

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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 hours.

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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 TIHE AVEP>GE REACTOR PO)KR 8-12-80 03:00'4:OOJ 100%

8-13-80 8-13-80 15:00 73%

8-13-80 16:00 71%

8-13-80 17 00 83%

8-13-80 18 00 95%

8-13-80 19:00 100%

8-13-80 21:00~

8-13-80 22:00 90%

8-13-80 23:00 56%

8-14-80 :00 25%

8-14-80 01 00 1%

8-14-80 02:007 0%

8-14-80 04 00 Fuel burnu b core re ion.

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 1-131 2-132 1-133 I-135 ~DE 8-13-80 0905 0.0768 8-13-80 1400 Dropped CEA 87 8-13-80 1515 0.105 1715 0.152 8-14-80 0320 0.7144 0.2256 2.169 0.2362 1.317 0400 0.8044 0.2234 0.6963 0.2550 . 1.021 0453 1.136 0.2621 1.910 0.3403 1.69 0745 1.065 0.1646 0.8874 0.2631 1.332 0952 0.8939 0.1119 1.828 0.1697 1.406 1155 0.8283 0.0951 0.6375 0.1320 1.015 1400 0.88 Q DEQ iodine continued decreasing and pCi/gram on 8-18-80.

stabilized at approximately 0.025

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