ML20237D151

Requests That Util Notify NRC of Change of Status of Rept Entitled, Metallurgical Investigation & Root Cause Assessment of Part Length CRDM (Control Rod Drive Mechanism) Housing Motor Tube Cracking..., to Be Released to Public

ML20237D151
Person / Time
Site:	Prairie Island
Issue date:	08/20/1998
From:	Kim T NRC (Affiliation Not Assigned)
To:	Richard Anderson NORTHERN STATES POWER CO.
References
NUDOCS 9808250099
Download: ML20237D151 (4)

Text

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _

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August 20, 1998 i l

Mr. Rog:r O. And:rson, Director Nuclsar En:rgy Enginnring Northern States Power Company 414 Nicollet Mall Minneapolis, Minnesota 55401

SUBJECT:

TRANSMITTAL OF NONPROPRIETARY CLASSED WESTINGHOUSE PRELIMINARY

SUMMARY

ROOT CAUSE EVALUATION (PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2)

Dear Mr. Anderson:

By Northern States Power Company's (NSP's) letter dated April 6,1998, NSP submitted a '

Westinghouse report titled, "MetallurgicalInvestigation and Root Cause Assessment of Part L ength CRDM [ control rod drive mechanism) Housing Motor Tube Cracking at Prairie Island Nuclear Generating Plant Unit 2 - Preliminary Summary Report." This report was marked as Westinghouse Proprietary Class 2 and was withheld from public disclosure pending receipt of an affidavit for withholding pursuant to 10 CFR 2.790.

l By letter dated July 15,1998, NSP notified NRC that Westinghouse had determined that the l report could now be classified as Non-Proprietary Class 3. A copy of the report marked as '

nonproprietary was enclosed with your letter and has been placed in the NRC Public Document Room.

We appreciate your notifying NRC of the change of status of this report so that it could be released to the public.

Sincerely, Original signed by:

Tae Kim, Senior Project Manager Project Directorate Ill-1 Division of Reactor Projects -Ill/IV Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306 cc: See next page Mr. Nicholas J. Liparulo, Manager Regulatory & Engineering Networks Westinghouse Electric Corporation ,.

, engpf Box 355 _ . g . ,a s_ e 4 wn% h Pittsburgh, PA 15230-0355 l

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DISTRIBUTION:

Docket File PD 3-1 Rdg M.P. Siemien 76 \ 'D PUBLIC E.Adensam (EGA1) M.Kunowski, DRP/ Rill DOCUMENT NAME: G:\WPDOCS\ PRAIRIE \Pl980406. PRO T1b FeCthre a copy Of thlt document, indicate in the box: "C"

• Copy without attachment / enclosure "E" = Copy wth attachment / enclosure "N" s No copy i

OFFICE LA:PD31 C PM:PD31 , lC OGC l C; D.PD31 [

NAME CJamerson d/ TJKim '7M MPSiemen \$h CACarpenter()F DATE 08/ /, /98"// 08/ f /s8 08/ H ) /98 ' 08/ t\ /98

, OFFICIAL RECORD COPY 9808250099 980820 PDR ADOCK 05000282 P PDR u___________ _ _ _ _ . ___ __

s' .

x-August 20, 1998 l Mr. Rogsr O. And:rson, Dir ctor Nuclaar Energy Engineering

'.- Northern States Power Company 414 Nicollet Mall Minneapolis, Minnesota 55401

SUBJECT:

TRANSMITTAL OF NONPROPRIETARY CLASSED WESTINGHOUSE PRELIMINARY

SUMMARY

ROOT CAUSE EVALUATION (PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2)

Dear Mr. Anderson:

By Northern States Power Company's (NSP's) letter dated April 6,1998, NSP submitted a Westinghouse report titled, " Metallurgical investigation and Root Cause Assessment of Part Length CRDM [ control rod drive mechanism] Housing Motor Tube Cracking at Prairie Island Nuclear Generating Plant Unit 2 - Preliminary Summary Report." This report was marked as Westinghouse Proprietary Class 2 and was withheld from public disclosure pending receipt of <

an affidavit for withholding pursuant to 10 CFR 2.790.

By letter dated July 15,1998, NSP notified NRC that Westinghouse had determined that the report could now be classified as Non-Proprietary Class 3. A copy of the report marked as nonproprietary was enclosed with your letter and has been placed in the NRC Public Document Room.

{

We appreciate your notifying NRC of the change of status of this report so that it could be released to the public.

Sincerely, Original signed by:

Tae Kim, Senior Project Manager j Project Directorate lil-1 Division of Reactor Projects - lll/IV Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306 cc: See next page Mr. Nicholas J. Liparulo, Manager Regulatory & Engineering Networks '

Westinghouse Electric Corporation Box 355 Pittsburgh, PA 15230-0355 DISTRIBUTION 1 Docket File PD 3-1 Rdg M.P. Siemien PUBLIC E.Adensam (EGA1) M.Kunowski, DRP/Rlli

- DOCUMENT NAME: G:\WPDOCS\ PRAIRIE \Pl980406. PRO Ta esceive a copy of this docuenent. Indicate in the boa: "C" a Copy without anschment/ enclosure "E* = Copy with attachment / enclosure "N" a No copy l OFFICE LA:PD31 C PM:PD31 , lC OGC l C; D:PD31 (

lNAME CJamerson d/ TJKim T){ MPSiemen \@ CACarpenter( f lDATE 08/ (, /98 // 08/ 4 /ff8 08/ W ) /98' 08/ t\ /98 OFFICIAL RECORD COPY

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,/*g$

• UNITED STATES g NUCLEAR REGULATORY COMMISSION E

E WASHINGTON, D.C. 30006 4001 g,*****/ August 20, 1998 Mr. Roger O. Andemon, Director Nuclear Energy Engineering Northem States Power Company 414 Nicollet Mall Minneapolis, Minnesota 55401

SUBJECT:

TRANSMITTAL OF NONPROPRIETARY CLASSED WESTINGHOUSE PRELIMINARY

SUMMARY

ROOT CAUSE EVALUATION (PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2) J l

Dear Mr. Anderson:

l l

By Northern States Power Company's (NSP's) letter dated April 6,1998, NSP submitted a {

Westinghouse report titled, " Metallurgical Investigation and Root Cause Assessment of Part length CRDM [ control rod drive mechanism) Housing Motor Tube Cracking at Prairie Island 1 Nuclear Generating Plant Unit 2 - Preliminary Summary Report." This report was marked as Westinghouse Proprietary Class 2 and was withheld from public disclosure pending receipt of an affidavit for withholding pursuant to 10 CFR 2.790.

By letter dated July 15,1998, NSP notified NRC that Westinghouse had determined that the report could now be classified as Non-Proprietary Class 3. A copy of the report marked as nonproprietary was enclosed with your letter and has been placed in the NRC Public Document Room.

We appreciate your notifying NRC of the change of status of this report so that it could be released to the public. I l

Sincerely, dd. -

Tae Kim, Senior Project Manager Project Directorate 111-1 Division of Reactor Projects - Ill/IV Office of Nuclear Reactor Regulation

. Docket Nos. 50-282 and 50-306

cc

See next page Mr. Nicholas J. Liparulo, Manager Regulatory & Engineering Networks Westinghouse Electric Corporation Box 355 '

Pittsburgh, PA 15230-0355

.N

% 1 Mr. Roger O. Anderson, Director Prairie Island Nuclear Generating Northern States Power Company Plant cc:

J. E. Silberg, Esquire Site Licensing Shaw, Pittman, Potts and Trowbridge Prairie Island Nuclear Generating 2300 N Street, N. W. Plant Washington DC 20037 Northern States Power Company 1717 Wakonade Drive East Plant Manager Welch, Minnesota 55089 Prairie Island Nuclear Generating Plant Tribal Council Northem States Power Company Prairie Island Indian Community 1717 Wakonade Drive East ATTN: Environmental Department >

Welch, Minnesota 55089 5636 Sturgeon Lake Road Welch, Minnesota 55089 Adonis A. Nebiett Assistant Attorney General Mr. Nicholas J. Liparuto, Manager Office of the Attorney General Regulatory & Engineering Networks 455 Minnesota Street Westinghouse Electric Corporation Suite 900 Box ",55 St. Paul, Minnesota 55101-2127 Pittsburgh, PA 15230-0355 U.S. Nuclear Regulatory Commission Resident inspector's Office 1719 Wakonade Drive East 1 Welch, Minnesota 55089-9642 Regional Administrator, Region til U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Mr. Stephen Bloom, Administrator Goodhue County Courthouse Box 408 Red Wing, Minnesota 55066-0408 Kris Sanda, Commissioner Department of Public Service 121 Seventh Place East Suite 200 L St. Paul, Minnesota 55101-2145 June 1998 l: