ML20085A506
| ML20085A506 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/31/1975 |
| From: | Randy Baker BABCOCK & WILCOX CO. |
| To: | Jonathan Evans TOLEDO EDISON CO. |
| References | |
| TASK-03, TASK-05, TASK-06, TASK-07, TASK-3, TASK-5, TASK-6, TASK-7, TASK-GB GPU-0490, GPU-490, NUDOCS 8307060540 | |
| Download: ML20085A506 (1) | |
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Mr. J. Q. Evans. Station Superintendent .'
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Dear Jack:
,.,, g One of our custcoers recently experienced a pressuriser electronatic relie valve malfanction while at low power in preparation for plant shutdown.
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pressure transient in the Reactor Cools:t Eyste:The valve failed to close after pnssure
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4 Failun to procytly duced causing the Quench Tank rupture disc to :.:pture.
close the electromatic relief isolation ralve resulted in violations of sew.'*'.<.:-,'
$1,7 eral plant limits,1. e. fuel compression curve, cooldown rates..:j.
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The Pressuriter Electromatic Relief Yalve at Davis-Besse Unit I is a Crosby --
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Style EPV-53 solecoid pilot operated relief velve. (D&W Inatruction M m. n
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motion should be made during plant shutdowns.,
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' pronpt closure of the electronatic relie, uncontrolled RCS
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