ML19322B583
| ML19322B583 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 11/28/1975 |
| From: | Parker W DUKE POWER CO. |
| To: | |
| References | |
| NUDOCS 7912040612 | |
| Download: ML19322B583 (2) | |
Text
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e Dmac Powsu COMPANY STEA31 l'ItOI)UUTION III?I'T.
Tcotenouc; asica vo4 373 4011 GENEll AI, OFFICF.S 422 SOUTH CHURCH STRecT C11AltLo rrE, N. C. 2824 2 P, c. sox st7s November 28, 1975 Mr. Norman C. Moseley, Director U. S. Nuclear Regulatory Commission Suite 818 230 Peachtree Street, Northwest 30303 Atlanta, Georgia Oconee Nuclear Station 50-269, -270, -287 Re:
Docket Nos.
Dear Mr. Moseley:
t fuel pool, in the Oconee Unit 3 spenfuel racks, was drained Prior to November 19, 1975, preparation for the installation of new spentOconee N lled release to the Keowee t
to the upper settling basin pending con ro be limited such that River via the lower pond. Specification 1.2A requires that station On i
the boron concentration in the Keowce R verafter calculations we re conformance November 19, 1975, h
21, 1975, to this technical specification, disc arg Ilowever, on November basin to the Keowee Rivcc was initiated.
tly determined that the a recalculation was made, and it was subsequenboron had been exceeded.
h The discharge of the upper settling basin was t en further boron release.
ulted from an The high boron concentration in the Keowee River res h lower pond. A initial miscalculation of the release rate from t edisc f 377 ppm had been h
calculated for the upper settling basin whic, w00 gpm) would be reduced to sources to the lower pond (approximately 35A release rate he Keowee River had been assumed, which with 5.38 ppm 5.38 ppm.
in the Keowee River.
in a concentration well below the 0.2 ppm limitHow tually 3500 gpm instead of 50 gpm resulting~1n an excThis error was discovered and corrected had been 1.03 ppm in the Keowee River.During this 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, the Keowee Hydro Plant
' after 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
i N9180,40f(J
Mr. Norman C. Moseley November 28, 1975 Page 2 additional discharge to the h
03 ppm to 0.004 ppm, well operated for 13.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> during which time t eriver had d f 0.2 ppm was exceeded for below the 0.2 ppm limit.
existed, the technical specification limit o for the remaining 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br />.
approximately 34 hours3.935185e-4 days <br />0.00944 hours <br />5.621693e-5 weeks <br />1.2937e-5 months <br />, but well within limitsThe averago the entire period was calculated to be 0.315 ppm.
releases of i
When discharge rates a?e to be calculated for non-rout net s will be determin this type, at least two independent release ra eAgreem tes will be Technical Services will required prior to initiating the discharge. recommended relea t recurrence of this incident.
be required for non-routine releases.
these administrative procedures should preven
/
Very truly yours, e d..u+ k William O. Parker, Jr.
EDB:mmb 4
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