ML19340A915
| ML19340A915 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 04/04/1973 |
| From: | Brian Lee COMMONWEALTH EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML19340A914 | List: |
| References | |
| NUDOCS 8009080588 | |
| Download: ML19340A915 (2) | |
Text
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L Commonwealth Edison Company ONE FIRST NATIONAL PLAZA
- CHICAGO. ILLINOIS Address Reply so.
POST OFFICE BOX 767
- C H I C A G O, IL L INOIS 60690 April 4, 1973 Mr. Boyce H. Grier Regional Director Directorate of Regulatory Operations - Region III U.S. Atomic Energy Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Subject:
Response to Noncompliance Item for Dresden Unit 1, AEC Docket No. 50-10 7
Dear Mr. Gr.er:
The following is presented in regard to the item of noncompliance with Technical Specification J.S.a. (3) noted in Re,ference (1).
Specifically, Dresden 1 chimney discharge rate averaged over a 48-hour period exceeded twenty percent of the License Limit for Iodine-131 and particulates with half lives greater than eight days.
Each 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period of operation at twenty percent of the DPR-2 license limit corresponds to approximately 1/1000 of the annual average limit as specified in 10 CFR 20.106.
Technical Specification B.8.C.(4) defines such an event as an abnormal occurrence.
Technical Specification J.5.a.(3) requires that Commonwealth Edison notify Region III Regulatory Operations Office within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of.any abnormal occurrence.
-Notifkbatib~nwasmadepromptlywhenresultsofour
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(7-day decay) which is used for effluent reporting ana)rsis indicated that the.specified.value,.20% of license limit, had been exceeded slightly'(21"2~of t N License' Limit).
The' i e sults 1
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-of this analysis have always been used in the past as the best available quantitative information.
It is true that notification was not made after the preliminary (60-hour decay) analysis results indicated the specified value (20% of the License Limit) had been 8000030 $ g n-
h c.
C es e Commonwealth Edison Company'~
Mr. B. H. Grier April 4,'1973 4
slightly exceeded (26% of the License Limit).
The 60-hour analysis has previously been used only as a " rough" indication.
This reporting action was subsequently determined to be in noncompliance with Technical Specification J.5.a. (3).
Hence, the following preventive steps have been taken:
1.
A daily plot of the Unit 1 chimney discharge rate (averaged over a 24-hour sampling period) for Iodine-131 and particulates with half lives greater than eight days, as estimated by the preliminary (60-hour decay) data, is being maintained by Radiation Protection Department management personnel.
An appropriate plot will be maintained as long as this analysis is required.
2.
A written procedure was placed in service which requires the personnel who perform the analysis immediately notify Radiation Protection Supervision whenever either the preliminary (60-hour decay) analysis or the reporting (7-day decay) analysis indicates a Unit 1 chimney discharge rate (averaged over a 24-hour sampling period) for Iodine-131 and particulates with half lives. greater than eight days in excess of 10% of the License Limit.
The above steps assure that any future releases from the Unit 1 chimney of Iodine-131 and particulates with half lives greater than eight days in excess of 20% of the license limit will be reported within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the preliminary (60-hour decay) indication.
Hence, full compliance is assured.
Very truly yours, s\\
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c. _.--.-- 7 q r_.7_,- ; : e
- Bprdn~ Lee ~, Jr.
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Assistant to the President (1)
Reference:
Letter to Mr. Byron Lee, Jr.
from Boyce H. Grier, dated 3/13/73.
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