ML20063P836
| ML20063P836 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 08/17/1982 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8210150369 | |
| Download: ML20063P836 (2) | |
Text
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.W._...,,. nDUKE POWElf COMPANY MTEAM PHODUCTION DEPT.
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- 37. liUC N CIY WLOTTE, N. C. 28242 August 17, 1982 Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Re: Oconee Nuclear Station IE Inspection Report 50-269/82-21 50-270/82-21 50-287/82-21
Dear Sir:
As indicated in Mr. R. C. Lewis's letter of July 9, 1982 which transmitted the subject inspection report, Duke Power Company agreed to investigate item 7a.,
and report the results. Please find attached the results of our investigation which conclude that the subject excessive dead time will cause insignificant errors in halogen activities reported.
Very truly yours, d
s
//
lal B. Tucker Vice President Nuclear Production Department JFN:1s Attachment 8210150369 820817 PDR ADOCK 05000269 f6*ol
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Item 7a.
The inspector noted that deadtime values for gamma spectroscopy analyses of waste gas silver zeolite cartridges were as high as 25 percent for several of the sample analyses conducted during the first half of 1982. These analyses were approved for effluent accountability although the deadtime exceeded the 10 percent control limit. The inspector informed licensee representatives that high resolution gamma-ray spectrometers are very susceptable to pulse pile-up losses which would result in underestimating the quantity of.radioiodine released. Licensee representatives indicated that they would purge the silver zeolite cartridges to remove the noble gas contributing to the excessive deadtime. The inspector stated that this item will be considered unresolved pending further investigation by the licensee on the effect of excessive deadtime on the analyses of silver zeolite cartridges for radiciodine and the effect of that concern on effluent accountability. Licensee representatives indicated they would conduct an investigation and report results to the regional office by letter within sixty days from the date of the exit interview (269/82-21-02, 270/82-21-02, 287/82-21-02).
Response
l An investigation into this matter was conducted as agreed. The investigation shows that excessive dead time will, in fact, cause errors in halogen activities reported. However, the total error in halogen curies released is insignificant and requires no further action.
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