ML20030D313
| ML20030D313 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/24/1981 |
| From: | Mroczka E NORTHEAST NUCLEAR ENERGY CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| MP-1-1854, RO-50-245-81-03, RO-50-245-81-3, NUDOCS 8109010166 | |
| Download: ML20030D313 (2) | |
Text
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Reference:
Provisional License DPR-21 4 lu Docket No. 50-245 ETS-NR/50-245/81-03
Dear Mr. Grier:
Pursuant to the Millstone Environmental Technical Specifications, Section 2.4.1.3, Northeast Nuclear Energy Company hereby forwards the followir.g report regarding unmonitored release of radioactive liquid effluents.
An additional three copies of the report are enclosed.
Yours truly, NORTHEAST NUCLEAR ENERGY COMcANY E.
. Mroczka Station Superintendent Millstone Nuclear Power Station EJM/TT:bjo
Attachment:
ETS-NR/50-245/81-03 cc:
Director, Office of Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, D. C. 20555 U. S. Nuclear Regulatory Commission, c/o Document Management Branch, Washington, D. C. 20555 16N
.c Ifl 8109010166 810824 PDR ADOCK 05000245 g
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LER ETS-NR/50-245/81-03 NORTHEAST NUCLEAR ENERGY COMPANY MILLSTONE NUCLEAR POWER STATION - UNIT 1 PROVISIONAL LICENSE NUMBER DPR-21 DOCKET NUMBER 50-245 Identification of Occurrence Unmonitored release of liquid waste effluents was identified.
Conditions Prior to Occurrence Prior to occurrence the plant was increasing power from 75 percent of rated.
Description of Occurrence On August 13,1981 at 1530 hours0.0177 days <br />0.425 hours <br />0.00253 weeks <br />5.82165e-4 months <br />, a routine radioactive liquid discharge from Water Sample Tank B to Long Island Sound was performed with an inoperable radiation monitor. Environmental Technical Specification 2.4.1.3.c requires radioactivity in liquid wastes to be continuously monitored during release.
Routine sample analysis of the water revealed the following activity levels:
Isotope Activity (uci/mi)
Magnesium 54 6.6 x 10-7 Cobalt 60 2.9 10-6 The unmonitored release was discharged at an average rate of 237 gpm for a period of 82 minutes.
Designation of Apparent Cause of Occurrence Normal procedure dictates that prior to discharge the operator first place the liquid effluent monitor drawer function switch in a calibration position for pre-discharge checks. Following these checks the switch must be placed in an operace mode before effluent discharge begins. The liquid effluent monitor drawer function switch was left in the calibration position following pre-discharge checks.
Analysis of Occurrence Subsequent radiological assessment of the incident demonstrated that the discharge did not result in any health or safety implications due to activity level and the relatively small volume of discharge.
Corrective Action Upon identification of the incident the monitor function switch was placed in the operate position and the d charge completed. The liquid effluent waste monitor will be modified to prevent a discharge when in the calibration check mode.