ML17192A708
| ML17192A708 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities  |
| Issue date: | 05/13/1980 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Peoples D COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8005270005 | |
| Download: ML17192A708 (5) | |
Text
.
UNITED ST ATES NUCLEAR REGULATORY COMMISSION
.. WASHINGTON, D. C. 20555, Docket Nos.~
50-249 50-254 and 50-265 Mr. D. Louis Peoples Director of Nuclear Licensing Coll1Tlonwealth Edison Company P. 0. Box 767
~
Chicago, Illinois 60690
Dear Mr. Peoples:
. May 1 3, 1 980 We have completed our review of your submittals of November 1, 1979, Dece~ber 14, 1979~ and February 1, 1980, regarding the adequacy of station electric. di stri bu't:ion system voltages at Ores.den Uni ts 1, 2 and 3, and
- Quad Cities 1 and2.
In the course of our review, we have determined that the additional informatio.n identified in the enclosure is required.
We request that the additional information be sutmitted within 45 days of your receipt of this letter.
Enclosure:
Request for Additiona 1 Information cc w/enc.losure:
See next page Sincerely,
~*
~
Mr: D.Louis.Peop1es C~:twealth.Edison Company.
cc:
Mr. o: R. Stich~oth Presid!!rit *
- Iowa-Illinois Gas and
- Electric Company 206 East Second Avenue
- 3. -
Davenport,* Iowa 52801 Mr *. John W. Rowe Ishan, Lincoln & Beale Cour.selors at Law
- One First National Plaza, 42rid Floor Ghicago~ 111 i.nois. 60603 Mr.* Ni ck Ka 1 i vi anakas Plar.t Superintendent Qua~ Cities Nuclear Power Station
. 22710 - 206th Avenue - North Corc-:Jva, Illinois 61242
- U. S.
- Huclear Regulatory Commission Resident Inspector's Office
- Dresden Station.
RR fl
. Merri s, 111 i no1 s
- 60450
- Moline Public Library.
504 - 17th,Street Moline, Illinois 61265 Susan N. Sekuler Assistar.t Attorney General Env~ronr..ental Control Division 188 ~- Randolph Street Suite 2315
. Chi cioo, Illinois 60601 Mr. N. Chrissotimos, lnsp~ctor US ?iu=lear Regulatory Corrr:iission Box 756 Bet:e:idcrf,. Iowa 52722
. Mr. S~ B~ Stephen~on Pla~t Superintendent Dresc~n Nuclear Power Station Rur~t Rcute #1 Morris, Il 1 i no is.* 60450 *
... **----:---,------c *****-***---
A
ENCLOSURE DRESDEN 1,2, AND 3 (DOCKET NOS. 50-10, 50-237, AND 50-249)
QUAD-CITIES l AND 2 (DOCK.ET NOS. 50-254 AND 50-265)
References:
. Qn:snoxs ON ADEQUACY OF STATION ELECTRIC D:!:-STRIBl'TION SYSTEM VOLTAGES
- a.
CECo letter (Janecek) to NRC (Gamnill), "Adequacy of Station Electric Distribution System Voltages," dated_ February 1, 1980.
- b.
NRC generic lette_r to. all Power Reactor Licensees, "Adequacy ofStati-:;!'l
- Electric Distribution_ System Voltage," dated August 8, 1~79.
- c.
"Adequacy of St.:>ti.on Electrical Distribu~~;.,., Systems Voltages; Dresden unit 1, 11 Sargent & Lundy Engi_neers report, ai:tachmen: A to refere*n:::e a.
- d.
CECo lett;er (Janecek) to NRC (Gammill.), "Adequacy of Station Electric*
Dis.:::-ibution System Voltage," dated Novembe.r 1,-1979.*- *
- e.
"Adequacy of Station Electrical Distribution Systems Voltages,",
Dresden: Units 2/3 1 11 Sargent & Lundy Engineers report, enclosure*! of
- reference d.
- f.
"Adequacy of Sta ti on. Elec tr ica 1 Distribution Systems Voltages, 11 Quad-Ci ties," s.argerit & Lundy Engineers report, enclosure 2 of reference d.
g.*
"Adeqi.lacy of Stat.ion Electrical Distribution Systems Voltages," Zion,"
Sa:rgent & Lundy Engineers report, enclosure 3 of reference d.
- h.
CECo letter (Janecek)* to NRG (Gat!l!llill)., "Adequacy of Station Electri*c Distribution System Voltages," dated December 14, 1979.
l
Q*.Je stio::s:
L The CECo suanary attachme~ta (last paragraph) concludes that the cc::;?uter program results neeci not be _compared to test results for Dresden l.
While the Zion program and,input parameters were -verified by test, it is not known tha: _the *input -parameters for Dresden l. (or other units) can be.verified by test.
CECo shoulci verify.the program, input variables, and constants used for the.Dresden and Quad-Cities analyses per the requirements of reference b, page 2, paragraph 3.
- 2.
We:-e the -grid voltage values, 34;8.to 36.3 kV (item II, page
)c.
l 132 to 142 kV (item II, page l)e
. ' 344 to 362 kV (item II, page l)e, 3_33 354 kV (item f
343 354 kV (item to II, page* l), _and to II' page determined per NRC guideline 6?
If not, describe how they were cb:ained.
l)g
- 3.
Supply the calculated voltages for ail low voltage AC (less than 4BO V)
- class lE buses for each analyzed case.
Do these syste~i supply any ins::ruments and control circuits as required by GDC 13? If so, is all equipment capable of sustaining the analyzed vol~ages (blowing fuses, overheating, etc.)?* Is the connected equipment qualified by the manu-facturers to withstand the expect~~ voita~es without affecting their ability to perform the required function?
- 4.
Figure 3c,e,f~g shows the lowest bus voltage when starting the largest non-class lE load for the respective plants.
Did this motor start '<<hen all the other loads were running?
Give the effect of start-ing this load on all class lE buses and loads per N""RC guideline 3b What are the bus and load voltages when starting the largest 480 v*
class lE load "'Whan all other class lE loads are runriing?
- 5.
Define ho.-..the acronyms SAT and RAT are used.
It appears, from refer-ences e, f, and g, that they might be used interchangeably.
The sum-mar:'"' refer: to 5,-,.:, ;;nile the detail revie;; and figcres refer to RAT on all u~its except Dresden l.
2
- E.
Is it possible that th~ unit's ~AT c~n supply the class lE load gro~?
while the main generator is disconnected? If nothingprohibits such a connection to the offsite grid, this analysis shouid be pe:-formed per NRC guideline o.
For Multi-Unit Plants:
- 7.
Each SAT is capable of supplying its oW!l unit's auxiliary load and the e f g emergency load of the other unit (see the summary '
' )
- NRC guide-line 2 requires th~ voltage study for the largest load demand including
- . when one unit is in LOCA and the other unit is in safe shutdown.
The intercie.between buses 24-1 and 34-1 (Dresden)e, 14~1 and 24-1 (Quad~
Cities)f*,.and a similar arrange"1ent for Zion (bus numbers are unread-able in the report)g demand this voltage analysis.
3