ML19105A179
| ML19105A179 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 03/12/1976 |
| From: | Ragone S, Stallings C Virginia Electric & Power Co (VEPCO) |
| To: | Reid R, Rusche B Office of Nuclear Reactor Regulation |
| References | |
| Serial No. 933 | |
| Download: ML19105A179 (1) | |
Text
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- fl,,,
Dear -~r ~ Rusche:
VIRGINIA ELECTRIC.A.ND POWER COMP.A.NY RIOHMOND,VIRGINIA 23261 In: accordance with. Technical* Specificatiori: 4.:l4.; C.1. for Surry Power
.Station~.this report.describes* an:occurrence during which.the* difference be,;_
. tween' the' river water** ambient. temperature.:ineasured'. at', the' station high. level intake and cool1:ng water at. the* diSCilll;rge.. control structure
- exceeded* :15 degrees
- F.
.At -the* time *_of the** occurrence,. both* Unit_ Nos~* 1 and 2.were opera.ting at 100. percent power~. On February *28', 1976, at approximately 0310. hours, during a.routine inspection~.it was.noted:that.the*traveling water"screen for circulating water.pump 2-CW,;.;.lD was jammed._ -At 0632 hours0.00731 days <br />0.176 hours <br />0.00104 weeks <br />2.40476e-4 months <br />, a load reduction was initiated ori. Unit.No. 2.
At 0726 hours0.0084 days <br />0.202 hours <br />0.0012 weeks <br />2.76243e-4 months <br />, with Unit No.* 2 leveled out at SO.percent power; circulating water.pump-2-cw..:..m was secured to facilitate re-pair of. the s:reens *.. The. resultant reduction in circulating water'.flow caused a gradual increase in temperature difference* (6.T) *across *the.station.
At ap-p.roximately 0910 hours0.0105 days <br />0.253 hours <br />0.0015 weeks <br />3.46255e-4 months <br /> the. station* tiT exceeded 15 degrees F.
A further load reduction was initiated*.
Station. tiT decreased to below 15 degrees :F ~. at 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br />.*.The.duration of operationwith*the station t.T*in excess of 15.degrees
- F. was approximately
- 80 minutes.
The maximum. station t.T
- during this period was 15. 9 ~egrees. F.
There was no apparent adverse environmental impact re-sulting* from this occurrence.
Very*truly.yours, 2579