ML20084E416
| ML20084E416 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 01/19/1970 |
| From: | Nelson E ROCHESTER GAS & ELECTRIC CORP. |
| To: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8304150058 | |
| Download: ML20084E416 (2) | |
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a ROCHESTER GAS AND ELECTRIC CORPORA Tion u :) CAST ? vet:UL, dut' HEE.TEf:, in 14 />4 m, n. o m ~.
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3-January 10, 1970
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Dr. Futer A. Morris, Director 6./
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G United Statea Atomic Energy Commission
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N,,'ly2,7,QTk,A s Dubject: Violation of Cent?inment Integrity, January 0, Ido 1
Ginna Ctation Unit No.1
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Docket 50-244
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Dear Dr. Morris:
i, The reactor plant vraa tsen to a ecid shutdown condition on 5
l January 8,1970 in preparaticu for the replacement cf cix failed reactor
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ecolant temccrature detectore (RTD tym) and for work on the "D" reactor i
coolant pump. Circulation How from the Residual Eeat Reu. oval."yatam
{l wac stopmd at 1C25 hoa/s. At 1500 houra,and with tho reactor cookmt 0
nyctem at 100 F, the Puft icreman gave permission for both peconnel air lock doorc to be cuenea to ty rnit 'la.v of tools and eauipment for the i
MEuntenanCe planneQ.
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+ i To faellitate rem 7/al of the RTD'e, partial draining of the reactor Wh#
i n roclant system is reatired and this step v/as initiated at 2310 houra.
M Draining was hele to a niinimum rate for control and curveillane2. When I
indicationa were that the, reactor ecolart level viau below the RTD location,
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the drainage wau terminatea. This was reported as of the hour of 0135 on the morning of January 9,1070.
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At 0500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> on.innuary 9,1070 it was found that the reactor f
- oiant cyatem level still ecvered the lower RTD and m are drainage ww i
i; required to termit replacen'ent of the RTD's. Additional drniniruJ waa in temperature readings rann.ina. from 175',na.s taken at 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br /> indicated proceau when incore thermocouple readi 4
-F to le5"F. Theco temoeraturen I
exceeued the temperature limit for cold chutdown of 140 F nnd to be in II U
accordance with the Technical Spacification, contanunent integrity ahould have been in effect. One perconnel access door was immediately closed and the peraonnel air lock doors were returned to their normal interlocking
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condition within,an hour.
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[L JAN 26195 8304150058 700119 PDR ADDCK 05000244 9O3 1
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