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Text
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4 i
MAIRE HARHEE 'ATOMICPOWERCOMPARUe avav,,ay,?u",%',
(207) 623-3521 e
September 8, 1986 HN-86-116 GDH-86-209 Region I United States Nuclear Regulatory Commission Office of Inspection and Enforcecent 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention: Dr. Thomas E. Hurley, Regional Administrator
Reference:
(a) License No. DPR-36 (Docket No. 50-309)
Subject:
Primary Coolant System Iodine Spike of August 11, 1986 Gentlemen:
The following report on the primary coolant system iodine spike is submitted pursuant to Maine Yankee Technical Specification 3.2.C.
On August 10, 1986 at 0403 hours0.00466 days <br />0.112 hours <br />6.66336e-4 weeks <br />1.533415e-4 months <br />, the plant tripped due to low steam generator level following the loss of a static inverter. At 0506 hours0.00586 days <br />0.141 hours <br />8.366402e-4 weeks <br />1.92533e-4 months <br /> on August 11, 1986, Dose Equivalent I-131 (DEI) activity exceeded 1.0 uCi/ gram and remained above this level until 1253 hours0.0145 days <br />0.348 hours <br />0.00207 weeks <br />4.767665e-4 months <br /> the same day.
The DEI activity, along with plant operating characteristics, and the fuel burnup by core region are presented in Tables 1 and 2, respectively.
l Very truly yours, HAINE YANKEE ATOMIC POWER COMPANY
$ &~.helo Lt hG.D.Whittier, Manager Nuclear Engineering and Licensing l
1 GDH/bjp Enclosure 8612090841 e6090s PDR ADOCK 05000309 S PDR cc: Mr. Ashok C. Thadani
! Mr. Pat Sears l Mr. Cornelius F. Holden 8052L-SDE i)I pJ
9 MAINE YANKEE ATOMIC POWER COMPANY e
Table 1. Reactor Coolant System Dose Equivalent I-131 (DEI) Activity and Plant Operating Characteristics, August 8-11, 1986.
LETD0HN FLOH DEGASSIFIER DAIE IIME DEI (uCi/c) REACTOR POWER (%) RATE (com) OPERATION 8/8/86 1.18E-1 99 80 DA-1B 2030 gal.
8/9/86 1.22E-l 99 80 -
8/10/86 0403 Plant Trip 80 -
0800 9.83E-1 0 86 0948 8.49E-1 0 81 1408 6.06E-1 0 66 1857- 3.95E-1 0 77 2244 4.99E-1 0 .77 8/11/86 0506 1.90E0 0 113 DA-1B 2020 gal.
0604 1.67E0 0 113 0754 1.35E0 0 132 0840 1.15E0 0 134 1038 1.01E0 0 163 1253 7.30E-1 36 135 1623 5.11E-1 56 133 8052L-SDE
MAINE YANKEE ATOMIC POWEh COMPANY Table 2. Fuel Burnup by Core Region '
REGION CYCLE BURNUP (MHD/MT) TOTAL BURNUP (MHD/MT) 8/8/86 8/15/81 8/8/86 8/15/86 E16 6651 6821 27085 27255 LO 5582 5721 26908 27046 L4 7136 7313 34733 34910 L8 4663 4779 31151 31266 L12 6594 6755 35754 35915 M0. 8680 8887 20579 20786 M4 7301 7478 20237 20414 M8 8377 8580 23847 24050 N0 7757 7940 7757 7940 N4 7513 7697 7513 7697 N8 8983 9208 8983 9208 Core 7271 7449 20497 20675 5
8052L-SDE i
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