ML19332A327
| ML19332A327 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/22/1980 |
| From: | Crouse R TOLEDO EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 1-159, IEB-80-15, NUDOCS 8009110504 | |
| Download: ML19332A327 (3) | |
Text
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- v. h TOLEDO
%ss EDISON Docket No. 50-346 Acst.no P Cnoo5E License No. NPF-3 6, p_,s.m,
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Serial No. 1-159 August 22, 1980 Mr. James Keppler Regional Director, Region III Office of Inspection and Enforc.r ent U. S. Nuclear Regulatory Commis: an 799 Roosevelt Road Glen Ellyn, Illinois 60137 Dear Mr. Keppler; This letter is in response to IE Bulletin 80-15 dated June 18, 1980, (Log 1-383) as applicable to Davis-Besse Nuclear Power Station.
At-tached is Toledo Edison's required 75-Day response to the items of the Bulletin.
As requested by your letter, the following are estimates of the manpower expenditures in association with this Bulletin:
Review, Testing, Preparation of Report - 18 manhours Corrective Action
- 8 manhours Yours very truly, l
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RPC/TDM/DAH/ daw l
Attachment i
9 THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MADISON AVENUE TOLEDO. OHIO 43652 A009110 59 4 S 3
Response to IE Bulletin 80-15 Docket No. 50-346
- C Serial No. 1-159 Item 1.
Within 10 days of the date of this Bulletin, verify by direct inspection, in conjunction with the appropriate telephone com-pany representative, that the ENS at your facility is powered in the manner described in the two enclosures.
Response: This inspection, together with other activities described in Response #2, was accomplished on June 25, 1980, with a repre-sentative of General Telephone of Ohio in attendance.
I Item 2.
Those facilities which have station packages requiring on-site power, but which are not connected to a safeguards instrumenta-tion bus which is backed up by batteries and an inverter or equally reliable power supply, shall make necessary modifica-tions and provide such a connection.
Response
By FCR 79-087, ENS telephone equipment is fed from uninter-ruptible distribution panel YSl. Panel YS1 in turn is fed from the 120 volt D.C. Security System Battery "SB", which is charged from 480 volt MCC E-43.
MCC E-43 is normally fed from 480 volt Switchgear Bus E-4, but which would automatically transfer, on loss of power, to miscellaneous Diesel Generator K-9, rated at 480 volts, 165 KW.
The installation was completed on June 25, 1980, and was witnessed by USNRC Resident Inspector, L. A. Reyes.
Item 3.
All facilities are to develop and conduct a test, within 60 days of the issuance of this Bulletin, to verify that all extensions of the ENS located at your facility (ies) would remain fully op-erable from the facility (ies) to the NRC Operations Center in the event of a loss of offsite power to your facility (ies).
This is not intended to mean that an actual loss of offsite power be executed.
Response: To perform this test, a temporary modification (T-4894) was initiated for the Miscellaneous Diesel Generator (MDG) System Procedure SP 1102.19. With the MDG Engine Control in " Auto",
the transfer switch was placed in " Test" which initiated an automatic start of the MDG.
When MDG supply voltage and fre-quency reach preset limits, the Transfer Switch loaded the MDG.
This simulated loss of offsite power to the 480 volt Switchgear Bus E-4.
With the MDG supplying power to MCC E-43, the four extensions of the ENS were individually used to place a call to the USNRC Operations Center, with each call being verified by a return call. This test was conducted on August 14, 1980.
pTo " B o
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l Response to IE Bulleting 80-15 Docket No. 50-346 Serial No. 1-159 Page 2
. Item 4.
It it is determined that a station package requiring on-site power is not connected to a safeguards instrumentation bus backed up by automatic transfer to batteries and an inverter or an equally re-liable power supply, notify the NRC Operations Center via the ENS within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after such determination.
Response: Not applicable.
Item 5.
Prepare and issue an administrative procedurc or directive which requires notification to the NRC Operations Center by commercial telephone or relayed message within one hour of the time that one or more extensions of the ENS located at your facility (ies) is subsequently found to be inoperable for any reason.
Response
In response to 10 CFR 50.72, issued for use by IE Information Notice 80-06, the Station issued a revision to Special Order 22 which details the use of the ENS telephones. To comply with this directive, the following paragraph has been added:
"If one or more of the red telephone (ENS) extensions noted above is found to be inoperable for any reason, the NRC Opera-tions Center shall be notified within one hour by:
(a)
Any remaining operable red telephone (ENS) extension; (b) commercial telephone (301) 492-8111; and, (c) relayed message by other means. Report-ing of this type incident is required by IE Bulletin 80-15, dated June 18, 1980."
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