ML20039B788
| ML20039B788 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 12/08/1981 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 8112230556 | |
| Download: ML20039B788 (2) | |
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A kN um esooo December 8, 1981 15219 United States Nuclear Regulatory Commission t-O Office of Inspection and Enforcement g
c3 Attn:
R. C. Haynes,. Regional Director NECE[yg hg Region 1 p
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Reference:
Beaver Valley Power Station, Unit No. 1 J
Docket No. 50-334, License No. DPR-66 Inadvertent De-energization of Linestarters
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Gentlemen:
This is to advise you of our status regarding measures taken to guard against the inadvertent de-energization of linestarters at our Beaver Valley Power Station.
Additional measures taken M this time are as follows:
I 1.
An area has been marked.with tape on the firor three (3) feet in front of selected emergency motor control centers.
2.
Rope barriers with signs warning personnel to work outside the 4
three foot area in front of the tuotor control centers are being i
u'ilized in rooms where construction work is occuring.
In cramped c
areas, such as where linestarters face each other. - these measures (1 & 2) may be modified to just rope off access to the motor control
- centers, i
3.
Signs have been.placed on each linestarter indicating whether it-should be ON or OFF during normal plant operations.
4.
The Construction Department'has been instructed te notif) Operations any time they must work or erect scaffolding inside the three foot clear zone.
5.
We have removed the scaffold from the East Cable Vault (which probably contributed to the ' inadvertent de-enerization of the linestarter for._feedwater valve'(MOV-1FW-151A]).
6.
-Modifications have been rade to all emergency motor control center linestarter operating mechanisms except MCC-E5 and E4 to provide a positive latch to secure the operating handlefin the proper positions..These modifications will not prevent operation, if required, during normal or emergency conditions. -Modifications to MCC-E4 and E5 will be completed by December 15, 1981.
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Mr. R. C. Haynes, Regional Director December 8, 1981-Page 2 In addition to the Emergency Motor Control Centers, the same modifications have been made to four (4) other Motor Control Centers and others are in progress.
We believe that these measures will be ef fective in preventing inadvertent movement of linestarter operating mechanisms in the future.
If you have any additional questions, please contact my office.
Very truly yours, J. J. Carey Vice President, Nuclear cc:
Mr. D. A. Beckman, Resident Inspector U. S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, PA 15077 U. S. th2 clear Regulatory Commission c/o Document Management Branch Washington, DC 20555 Sc
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