ML19220B116
| ML19220B116 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 11/03/1976 |
| From: | Jurgensen R Indiana Michigan Power Co |
| To: | James Keppler NRC/IE, NRC/RGN-III |
| References | |
| Download: ML19220B116 (2) | |
Text
rloen INDI NA Er MICNIOANPOWER COMPANY DONALD C. COOK NUCLEAR PLANT P.O. Box 458, Bridgman, Michigan 49106 November 3,, 1976 Mr. J.
G. Keppler, Regional Director Office of Inspection and Enforcement United States Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen El lyn, ILL.
60137 RE:
Operating License DPR-58 Docket No. 50-315 AEO 50-315/76-06 o'ear Mr. Keppler:
As required by Appendix "B" Technical Specifications Section 5.4.2.1, this report is submitted in r elation to the abnormal envi-rormental occurrence reported on October 29, 1976.
Appendix "B" Technical Specification Section 2.2. 1.3 requires determination of total chlorine residual at the lake discharge each time the unit is chlorinated.
On October 29, 1976 at 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />, the total chlorine residual was not determined during the chlorination cycle due to the chemical technician being involved in other analysis and losing track of the time.
Upon realizingthe time, the technician imnediately began sampling at the condenser outlet with the first sample taken at 1035 hours0.012 days <br />0.288 hours <br />0.00171 weeks <br />3.938175e-4 months <br />;
- however, no chlorine residual was detected.
Chlorination of the circulating water system is presently accom-plished automatically'wice per day
( 1000 and 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br />) on a 30 minute program, with 20 minute actual chlorine injection.
Total re-siduals prior to this incident had been quite stable at 0.03 - 0.06 PPM at each chlorination and monitoring following the incident indicated that residuals remained in this range.
From this data,it is reasonably safe 'to assume that the total chlorine residual during the 1000 hour0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> chlorination period on October'9,. 1976 was in the 0.03 - 0.06 ppm range.
As this value is well below the maximum residual specified, it is felt that no adverse environmental impact has occurred.
NOV g -1976
The circulating water chlorination system has been in automatic operation since February 21, 1975 with the exception of unit and chlorination equipment outages with no prior instances of this type noted; however, the incident has been discussed with all section personnel and the importance of meeting Technical Specification monitoring requirements re-emphasized.
Should you require further information, please contact me.
Sincerely, RWJ/lv R.
W.
g en Plant anag er cc:
R. S. Hunter J.
E.
Dolan G. E. Lien R. J. Vollen BPI R.
C. Callen NPSC K.
R. Baker RO:III P.
W. Steketee, Esq.
R. Walsh, Esq.
G. Charnoff, Esq.
G. Olson PNSRC R. S. Keith J.
N. Hennigan Dir. IE (20 copies)
Dir. NIPC (2 copies)
R. Kilburn