ML17199U364

Forwards Request for Addl Info Re Util Implementation of 10CFR50.62 ATWS Rule for Plants,Per Util

ML17199U364
Person / Time
Site:	Dresden, Quad Cities, 05000000
Issue date:	02/18/1988
From:	Ross T Office of Nuclear Reactor Regulation
To:	Butterfield L COMMONWEALTH EDISON CO.
References
TAC-59089, TAC-59090, TAC-59132, TAC-59133, NUDOCS 8802230353
Download: ML17199U364 (4)

Text

Docket Nos.

50-237, 50-249 and 50-254, 50-265 Mr. L. D. Butterffeld, Jr.

Nucle~r Lfcensing Manager Commonwealth Edison Company Post Office* Box-767 Chicago, Illinois 60690

Dear Mr. Butterfield:

February 18,: 1988

~

DISTRIBUT.ION *

• *1.tJr¢.Ke.!.Jlte.J NRC & Local PORs DCrutchf1eld GHolahan LLuther TRoss * *

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OGC-Rockv1lle EJordan JPartlow PDIII-2 plant file PDIII-2 rdg. file

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. 59089,* 59090, 59132, AND 59133)

Commonwealth Edison Company (CECo) addressed implementation requirements of the 10 CFR 50~62 Anticipated Transient Without Scram (ATWS) rule for Dresden and Quad Cities StatiOns by a letter dated September 30, 1987.

However,. the information provided* was in:sufficient to determine compliance. Consequently, the NRC staff hereby requests additional: information as identified in.

.. "\\,.

The reporting and/or recordkeeping requirements contained in this letter

. affect fewer than ten r~spondents; therefore, OMB clearance is rwt *requjred *

. u.nder P. L.96-511. *

Enclosure:

As stated cc:

See next ~ag~

PDII I-2: PM TRoss:bj.

/Jf /88 PDII I-2: LA LLuther

/~/88 Sincerely, I-

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IS._

Thierry Ross, Proj~ct Manager Project Directorate IJ I-2 Division of Reactor Projects - III, IV,-.V and Special _Projects

~111e PDIII-2:PD DMuller

'if* /88

Docket Nos.

50-237, 50-249 and 50-254~ 50-265 It Di~TRIBUTION*,

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~*;,, Docket Fi.1 e, Y :.

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'. : NRC. & Loca 1.PDRs *,. EJordari

• Mr. L. D. Butterfield, Jr.

Nuclear Licensing Manager Conunonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690

Dear Mr. Butterfield:

DCrutchfield. *. '

'":JPartlow / *

' - GHolahan *: -

• .. ' PDIII-2 plant file

.. : *ll.:u:ther. *.

PO I lt:-2 rdg. fi 1 e,

TRo.ss :

SUBJE~T::.REQUEST FOR.ADDITIQNAL INFORMATlON (~AC ~OS. 59089, 59090,.59132, AND 59133)

/

Commonwealth.Edison Company (CECo) addressed implementat;on requirements of the 10 CFR 50.62 Anticipated Transient ~lithout Scram (ATWS) rule for Dresden and Quad Cities Stations by a letter _dated September 30, 1987.

However, the

.information provided was insufficient to determine compliance*.

Consequently, the NRC staff hereby request from CECo additional_ information as identi_fied *in

• Enclosure 1.

Furthermore*, thiS information should be provided t!) NRR within 30 days.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten*:.responderits; therefore, OMB clearance is riot< required under. *p~L.96-511.

Endosure:

As* stated.

cc:

See next page PDI i 1-t#:p~,.

TRoss:bj 7-/ /IP /88

. PDII I-.2: L~.

Lluther.;f.

J. I ;J./88 c..

• Sincerely, Thierry Ross, Project Manager*

Project Directorate II I-~

• Division of Reactor Pr6jects

• IV,'V and Special Projects OGCt~vil. le

/,1aa..

PDA~:PD D~Ee~

.ir /11 /88 I I_!.,**.

Mr. L. D. Butterf1eld, Jr.

Conmonwealth Edison Company cc:

Mr. Stephen E. Shelton Vice President Iowa-Illinois Gas and Electric Company P.O. Box 4350 Davenport, Iowa 52808 Mr. Michael M;ller~ Esq.

Sidley and Austin One First National Plaza Chicago, Illinois 60603 Mr. Richard Bax Station Manager Quad Cities Nuclear Power Station 22710 206th Avenue North Cordova, Illinois 61242 Resident Inspector U.S. Nuclear Regulatory Conmfssion 22712 206th Avenue North Cordova, Illincfs 61242 Chairman Rock Island County Board of Supervisors 1504 3rd Avenue Rock Island County Office Bldg.

Rock Island, Illinois 61201 Mr. Michael C. Parker, Chief Division of Engineering Illinois Department of Nuclear Safety 1035 Outer Park Drive, 5th Floor Springfield, Illinois 62704 Regional Administrator, Region III U.S. Nuclear Regulatory Co111T11ssion 799 Roosevelt Road Glen Ellyn, Illinois 60137 Quad Cities Nuclear Power Station Units 1 and 2

... ~ \\>

REQUEST FOR ADDITIONAL INFORMATION ON ATWS REVIEW RELATED TO ALTERNATE ROD INJECTION (ARI) AND RECIRCULATION PUMP TRIP (RPT) SYSTEMS QUAD CITIES STATION UNITS 1 & 2 DRESDEN STATION UNITS 2 & 3 Your submittal letter indicates the material presented j5 for Quad Cities Station Units 1 and 2 as well as Dresde'tl Units 2 and 3. Please provide the following design information as supporting documentation of your method of compltance with 10 CFR 50.62 and identify the units which are covered by each submittal item.

1.

The electrical functional diagrams for the ARI and RPT systems from the sensors to the final actuated devices.

1.1 Please provide the calculations indicated as in process (see attachment to Sept. 30, 1987 submittal letter) to verity ARI system design meets the requirements for.

timely completion. Also identity the ARI reset capabilities including the time delay to ensure ARI scram bas completed its opera lion.

1.2 Describe the manual lnitlatton capabilities and the means provided to protect the system from inadvertent opera tlon.

1.3 Verity no manual bypass of the RPT system ts available.

1.4 Identity the ARl/RPT information readouts and indications provided in the control room. Will the ARI valves have a positive position indication; where will the indication be located.

2.

Provide electrical one-line diagrams to demonstrate the electrical independence between the ARI system and the Reactor Trlp System CRTS), and the capability to perform the ARI function during the loss-of-offsite power event.

3.

Describe the system design which permits maintenance and the test of the system logic while the plant ls in power opera tlon.

4.

Verity that the ARI actuation setpolnts will not challenge the RPS scram set tings; identify the set tings and levels to be us ed.