ML17174A281
| ML17174A281 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 12/04/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Peoples D COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 7912270006 | |
| Download: ML17174A281 (3) | |
Text
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. Docket No. 50-237 Mr. D. Louis Peoples Director of Nuelear Licensing Commonwealth ~dison Company Post.Office Box 767 Chicago~ Illinois 60690 I
Dear Mr. Peoples:
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DECO~ 1979.
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--~ Loca*1 PDR ORB #2 REading NRR Reading DLZiemanri HSmith SJNowicki OELD OI&E (3)
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DCrutchfiel d
- RE:
DRESDE~ '.NUCLEAR POWER STATION, UNIT NO. 2 We are currently reviewing the adequacy of.th-e offsite.power systems of nuclear p,ower plants and 1n particular, *-the lo*ss *of off!dte
- power events at your facility~ One aspect of 'thfs r~view concerns
. the history of experienced total and *partial power outages and attendent degraded voltage or frequency conditions of the grid.
- I
- ,c ** '
In ou.r review of this matter we have drawn upon the* infonnation provided to us via.Licensee Event Reports and followup letters.which
. have been sent to us.
Our records.do not indicate that you have*
- experienced any loss of off site power ev~nt_s either completely or
' partially. Please review your experiences and, 1f any are identified, report them in answer to this letter and furnish the related infonnation as included in the enclosure.**
. l Please provide your resppnse *for t.he Dresden Nuclear -Power Station, Unit -
No.
- 2 ~o us with 1 n_ 90 days of the *r,iecei pt of this 1 etter.
- _Enc'l q~s.ure:
- Request for Additional
- Infonnation
,cc w/enclosure:
-~
~incerely, Original ~sii(led by,.
Dennis L. Ztcmanlil Dennis L Ziemann, Chief Operating Reactor's Branch #2 r5ivis1on of Operating Reactors Ol'l'IC:; en*.if~ #2
-. DOR:?J/!RB DOR:ORB #2_.
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OURNAMll.
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- u.*. GOVBRNMllNT.PAINTING O.. P'ICB: t *71.. *z11.. 711
rr. D. Louis Peoples cc w/enclosure:
Isham, Lincoln & Beale Counselors at Law One First National Plaza, 42nd Floor Chicago, Illiflois 60603 Mr. B. B. Stephenson
. Plant Superintendent
-Dresden Nuclear Power Station Rural Route #1 Morris, Illinois 60450 D
Anthony z. Reisman i~atural *Resources Defense Council
'917 15th Street, N. *w.
Washington, O. c.
20005 U. S. Nuclear Regulatory Commission ATTN:
Jimmy L. Barker P.* 0. Box 706 Morris, Illinois 60~50 Susan N. Sekuler Assistant Attorney General
~nvironmental Control Division 188 W. Randolph Street Suite 2315 Chicago, Illinois 60601 Morris Public Library 604 Liberty Street Mo~ris, Illinois 60451 Chairman Board of Supervisors of Grundy County Grundy County Courthouse Morris, Illinois 60450
- D:cenber 4, 1979 Department cf ~u~l~c Health ATTN:
Chief, :idsior. of r;ucl e:r Scfe:y 535 West Jeffe~scn Springfield, Cl~ncis 52761 Director, Tech~ica: ~ssess~:nt Division Office of Radi:tior. ?rcgra~s (AW-459)
U. S.
Envi!~nrr::n:a: Prctection Agency Crystal f*~~ 11 #2 Arlington, Virginia 2G460 U. S. Environrr.:nta1 ?rctection Agency Federal Activi:ies S;ar.ch Region V Offic:
ATTN:
EIS coc~o:N;TJR 230 South
Dear:
o;n S:r:et ChJcago,_Illir.:Jis 6J6C4
... ************************-*---*-*-********::*......................................................................................................... ******************-*******-******--*******----------------**-***********************************-***********~**(
.nclosu.re LOSS OF OFFSITE POWER SURVEY*
A.
For losses of offsite power where less than all offsite po~~-r was lost:*
- 1.
How many circuits to the offsite network are nonnally available and how many were lost during the event?
- 2.
What was the cause of the event?
- 3.
Why did the other lines not fail when some did fail?
- 4.
Was any voltage increase or decrease experienced just prior to or during the outage? If so, please give details, voltages reached, affects, etc. *
- 5.
Was any frequency decay experienced just prior to or during the.
outage? If so, please give details, lowest frequency reached, decay rate, affects on equipment operation, etc.
- 6.
How long was power unavailable from the circuit?
- 7.
Date of event.
B.
For 1 osses of all offsite. power:
- 1.
How long was the power off?
How long for partial recov~ry?
Please give details~
- 2.
If turbine trip occurred, how soon after did loss of offsite power occur?
- 3.
If power was recovered promptly (10 minutes or less), was it due to automatic o.r manual actions?
- 4.
Was any voltage increase or decrease experienced just prior to or duri~g the outage? If so, please give detials, voltages reached~ affects,. etc.
- 5.
Was any frequency decay experienced just prior to or during the outage?
If so, please give details, lowest frequency reached, decay rate, affects on equipment operation, etc.
- 6.
Date of event.