ML19256F311

LER 79-099/03L-0:on 791120,coolant Iodine Activity Exceeded Tech Spec Limit.Caused by Two Reactor Scrams & Increase in Fission Product Inventory in Coolant from Fuel Element Leak. Fuel Bundles to Be Sipped & Leaking Bundles to Be Removed

ML19256F311
Person / Time
Site:	Brunswick
Issue date:	12/06/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19256F309	List: ML19256F308 ML19256F311
References
LER-79-099-03L, LER-79-99-3L, NUDOCS 7912180482
Download: ML19256F311 (1)

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CONTROL BLOCK: I ] l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 lo l t l 9l N l LICENSEE 7 e'l C l B CODE l E l P 14l 2 l@l 15 0 l 0l -l 0LICENSE l 0 l NuvutH 0 l 0 l 0 l -l O 25l 0 l@l 26 4LICENSE l 1l lTlYPE1l JOll@l$ 7 C IA T $8l@

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D ATE 7 8 60 68 DOCKET NUM8ER 68 63 EVENT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo l2l l At 0855 on November 19, 1979, Unit No. 2 scrammed following approximatep two months l l o 13 l l of high power operation. During the subsequent startup, the reactor scrammed again I l o l 4 l l at 0425 on November 20, 1979. Coolant iodine activity, already increasing after the 1 0 s I first scram, exceeded the Technical Specification limit of 0.2 uCi/gm I131 dose I o e l equivalent. The maximum iodine activity was 0.414 uCi/gm. 1 10171 1 I o a ! Technical Specifications 3.4.5, 6.9.1.9b l SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT CODE SUSCODE SU8COCE g l Pl Bj@ l Xlh Z lh l Xl Xl Xl Xl X Xlh lZlh W h 19 20 7 8 9 10 18 12 13 la

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i l o l l Reactor power was held to <10% until the iodine activity returned within specifica- 1 I2 lilI tions. High coolant activity was caused by the two reactor scrams and subsequent 1 i 7 l increase in fission product inventory in the coolant coming from a leaking fuel I i 3 l element. The Unit No. 2 fuel bundles will be sipped during the next refueling i i 4 l outage and the leaking bundles removed from the core. l 7 8 9 80 STA S  % POWER oTHER STATUS OSO RY DISCO"ERY DESCRIPTION i 5 (_C_j@ l 0 l 0 l O l@l N/A l lAl@l Coolant Sample l ACTIVITY CONTENT RELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 7

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7 4 'J 10 69 80-NAME OF PREPARER A. C. Tollison, Jr. PHONE: 919-457-9521 ],

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