ML20087E940
| ML20087E940 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 02/03/1984 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML20087E867 | List: |
| References | |
| NUDOCS 8403160313 | |
| Download: ML20087E940 (3) | |
Text
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s DUKE POWER GOMPANY P.O. ISOX M3180 CHAMLOTTE N.C. 28242 HAL H. TUCKER Tet.resman n a russaou"*
(704) 37:F4&'la St105.R&B Panet"CTIOle February 3, 1984 Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303
Subject:
McGuire Nuclear Station Docket Nos. 50-369 and 50-370 Subj ect: RII:GBK IE Inspection Report 50-369/83-45,50-370/83-52
Dear Mr. O'Reilly:
Please find attached a response to Violation 50-369/83-45-03,50-370/83-52-03 which was identified in the subject report.
Duke Power Company does not consider any information contained in this report to be proprietary.
Very truly yours, fdB./% L/rfc]
Hal B. Tucker WHM/php Attachment ec:
Mr. W..T. Orders NRC Resident Inspector McGuire Nuclear Station 8403160313 840307 P.DR ADOCK O M g 1
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Duke Power Company McGuire Nuclear Station Response to Violation 50-369/83-45-03,50-370/83-52-03 Violation 50-369/83-45-03, 50-370/83-52-03, Severity Level IV:
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10 CFR 20.20lb requires a licensee to perform such surveys as (1) may be necessary to demonstrate compliance with 10 CFR 20.106 which limits the release of radioactivity in unrestricted areas to the concentrations in Appendix B. Table Il and (2) are reasonable under the circumstances to evaluate the extent of radiation hazards that may be present.
Contrary to the above, during the period from June to December 1983, the licensee did not make surveys which were reasonable under the circumstances to evaluate the release of radiciodine in airborne effluents to unrestricted areas. The licensee used improperly calibrated gamma-ray detectors to measure radioiodine in airborne effluents.
Response
Duke Power Company agrees that during the period from June to December 1983, McGuire Nuclear Station used improperly calibrated gamma-ray detectors to measure radioiodine in airborne effluents. However, the violation is inaccurate as stated in'that McGuire did make surveys which were reasonable under the 4
circumstances to adequately evaluate any radiation hazards present due to i
radioactive effluent releases.
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In order to meet the requirements of 10 CFR 20.201(b), surveys of airborne effluent hazards involve the following significant steps.
- 1) Selection of:an appropriate sample location, flow rate, sample size, and sampling apparatus.
- 2) Use of calibrated flow and pressure vacuum measurement devices.
- 3) Evaluation of sample volume using time, flow rate and pressure data.
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- 4) Use of calibrated detectors and utilization of a computer;to evaluate f
the results.
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- 5) Review of the analysis results by an authorized individual whh'is familiar with radiciodine analysis.
- 6) _thasurement of the? volume discharged and flow rate.
- 7) Analysis of the environment for receptor sites, food chain pathways-
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and dispersion characteristics.
- 8). Development _of'an algorithm to evaluate information and calculation of resultant offsite doses.
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e While the inspection did identify an error in one of the survey steps the resultant ef fect on the radiation hazard assessment can only have academic significance in that McGuire Nuclear Station released approximately 2.78E-3 curies of_I-131 and 4.74E-4 curies of I-133 during the second half of 1983 in airborne effluents. The calculated dose of an infant thyroid from this effluent le 2.14E-1 mrem or 2.85% of one half of the annual limit. The error identified in radiolodine analysis during the inspection was conservative and indicated that,the actual releases were only half of the measured values.
Due to the above described circumstances the survey conducted was reasonable and does not constitute a violation since compliat se with 10 CFR 20.201(b) was demonstrated.
The gamma-ray detectors were improperly calibrated by using.a sample cartridge incorrectly. All of the detectors have been recalibrated and a procedure change has been' implemented which requires a qualified individual to compar a new calibration data with previous data. This procecture step ensures consistent, correct calibrations. McGuire Nuclear Station is-presently in full compliance.
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