ML19345A505
| ML19345A505 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 10/24/1972 |
| From: | Autio H YANKEE ATOMIC ELECTRIC CO. |
| To: | US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| AO-72-17, AO-72-18, NUDOCS 8011240038 | |
| Download: ML19345A505 (2) | |
Text
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.YAb)KEE ATOMIC ELECTRIC COMPA NY
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United States Atomic Energy Co: ission g" E,, :. ?
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06' cv Attention: Directorate of Licensing License No. DPR-3 (Docket No. 50-29) c)
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Reference:
Abnormal Occurrence 72-17 Abnormal Occurrence 72-18
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Dear Sirs:
suffTO.W We are reporting the following Abnormal Occurrence e
A0-72-17 and A0-72-18.
'b CD A0-72-17 While operating at h98 Ist a ground developed on station While following a ground isolation procedure, the battery No. 1.
battery supply to the " Main Coolant Flow Cabinet A" vas opened causing An indicated loss the four main coolant lov flow relays to fail safe.
of tain coolant flow occurred which initiated a plant trip.
Subsequent investigation revealed that the ground detection procedure needed correction. This procedure has been corrected.
AO-72-18 Following the plant trip on October 18, 1972 (AO-72-17),
Rod No. 19 control rod No. 19 failed to fall co=pletely into the core.
fell from 90 inches to approxicately 2h inches. All other control rods Rod No. 19 and Group D vere subcequently with-bottomed in the core.
drawn to 90".
Since the ph nt is operating in accordance with the provisions of Change No. 100 the plant was returned to sertice.
Very truly yours, fff h. $
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Herbert A. Autio Plant Superintendent 5
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J. O'Reilly 801124003[
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AEC If TRIBUTION FOR PART 50 DOCKET 147 AL 4
(TEMPORARY FORM)
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CONTROL tio: 5841 9
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FIIZ FROM: Yankee Atomic Elec. Co.
DATE OF DOC:
KriEn Rowe, Mass. 01367 Herbert A. Autio 10-24-72 10-26-72 X
TO:
DRL SEh'2 LOCAL PDR 1 signed CIASS:
, @ ' HOP INFO INPUT lio CYS REC'D DOCL;T lio:
1 50-29 DESCRIPTION:
Ltr rpt Abnormal Occurrence ENCLOSURES:
A0-72-17 involving a ground developing on station battery No. 1 & Abnormal Occurrence A0-72-18 involving Control Rod No. 19 failing to fall completely into the core.....
DO ND: RTE
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