ML20085D399
| ML20085D399 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 11/10/1972 |
| From: | Utley E CAROLINA POWER & LIGHT CO. |
| To: | Oleary J US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20085D381 | List: |
| References | |
| NUDOCS 8307250330 | |
| Download: ML20085D399 (2) | |
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Carolina Power & Light Cuupany Q('
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Mr. John F. O' Leary, Director
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Directorate of Reactor Licensing Q '7 U. S. Atomic Energy Commission
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Washington, D. C.
20545 H. B. ROBINSON UNIT NO. 2 LICENSE DPR-23 t
DILUTION OF BORON INJECTION TANK _
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Dear Mr. O' Leary:
In accordance with paragraph 6.6.1.a, Technical Specifications 19, 1972, while operating at and Bases, it is reported that on October 99.5% power, "B" boric acid tank and the boron injection tank were found i
The boric acid tank concentration was to be low in boron concentration.
19,683 ppm, and the boron injection tank was 19,726 ppm.
The dilution occurred as a result of a test of the safety i
injection system on October 16, 1972. The safety injection pumps were lines.
operated to verify flow through all three cold leg safety injection Valve leakage during this test permitted a small quantity h
This was due to the improper seating of suction boron injection tank.
Subsequent and disc _harge isolation valves of the boron injection tank.
d recirculation of boric acid tank "B" with the boron injection tank resultein both of thes l
To correct the problem, the boron injection tank was recirculated hours, after which the boron injection tank with "A" boric acid tank for 1 i
concentration was verified to be 20,152 ppm, which was within specificat ons.
A batch of boric acid was prepared and added to "A" boric acid tank, and d through two batches of solution from "B" boric acid tank were reprocesse tion.
the boric acid evaporator to return the tank to its proper concentra The Plant Nuclear Safety Committee has reviewed this evolution boron and recommended that an analysis of the boric acid tanks and the 7 gjd f
injection tank be made immediately following any test involving the sa ety
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injection system which could cause dilution.
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November 10, 1972
, Mr. O' Leary Mr. Bill Sicdic of Region II, Division of Regulatory Operations, was notified by telephone, and Mr. John Davis of the same office was notified by telegraph on October 20, 1972.
Yours very truly,
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E. E. Uticy Vice President Bulk Power Supply SB/NBB:za Messrs. C. D. Barham ec:
N. B. Bessac B. J. Furr S. Grant 8
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