ML20248D644

Forwards Rev 0 to Societe Alsacienne De Consts Mecaniques De Mulhouse Diesel Generator Qualification Rept, Providing High Level Milestone Schedule for Util Project to Upgrade Safeguards Electrical Distribution Sys & Cooling Water Pump

ML20248D644
Person / Time
Site:	Prairie Island
Issue date:	09/29/1989
From:	Parker T NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
Shared Package
ML20248D648	List: ML20248D644 ML20248D649
References
NUDOCS 8910040351
Download: ML20248D644 (3)

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Northem States Power Company 414 Nicollet Mall Minneapolis, Minnesota 55401-1927 Telephone (612) 330-5500 September 29, 1989 Director of Nuclear Reactor Regulation U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 Project for Addition of Two Emerrency Diesel Generators Northern States Power Company has initiated a project to add two additional safeguards emergency diesels, to upgrade the safeguards electrical distribution system, and to upgrade #121 Cooling Water Pump to become a swing safeguards pump. A meeting was held in Bethesda on July 19, 1988 with the NRC staff to discuss our preliminary plans for this project. Further discussion of the plans for modifications is provided in our letter of April 13, 1989 .

I which contains our Station Blackout Response. The purpose for this letter is to provide the NRC Staff with the project schedule and the licensing plan and to request NRC concurrence with the proposed qualification plan for the new diesel generators.

Proiect Schedule A high level milestone schedule for the project is attached to this letter. It provides the current, "best estimate", dates for these major milestones.

Proiect Licensinn Plan A. The first submittal is composed of this letter and its two attachments.

B. The second submittal, scheduled for April, 1990, will incorporate the new diesel generators and the new cooling water system configuration into the Technical Specifications, and will include the following information:

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.'s, :C Northem Statae Power Company Iet er 29 1989 L .Page 2.of 3

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Technical. Specification page changes and evaluation

- LDesign report, incorporating.the detailed design information for the project addressing the applicability of codes, standards, regulatory guider ,NUREGs, General. Design Criteris, and Generic Letters m . . .

' Implementation plan, including a discussion of the means'of 4

-impicmenting'.the project while minimizing the impact on plant

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' Safety: evaluation, describing the results of. analyses to demonstrate (the safety of the proposed modifications

, , C. Periodic updates, notifying the NRC of any changes in our position on

" Standards" discussed in.the reports D. USAR will be revised in the next USAR revision following the completion

of the project incorporating the changes resulting from the project.

. Diesel' Generator Qualification Plan The new diesel generators for Prairie' Island will be provided by the

~ French firm, Socidte Alsacienne de Constructions Mdcaniques de Mulhouse:(SACM). Each diesel' generator set is a tandem arrangement of two SACM,'model-UD45, 16 cylinder engines coupled with a single driveshaft tr ~Jeumont-Schneider generator. The continuous rating.

of'each dies d generator set is'5400 KW.

The plan for: qualification of these diesel generators is attached. It is cour intent to meet the requirements of IEEE Std 387-1984, "IEEE Standard LCriteria for Diesel-Generator Units Applied as Standby Power Supplies for Nuclear. Power Generating Stations" in the-installation and testing of these diesel generators.

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IEEE Std 387-1984 subsection 7.2.2, Start and Load Acceptance Tests,

. details a method "...to establish the capability of the diesel-generator unit to start and accept load within the period of time to satisfy the plant design requirement." Subsection 7.2.2 also allows for the use of equivalent means to demonstrate reliability.

The attached qualification plan utilizes alternative methods as allowed by Subsection 7.2.2 of IEEE Std 387-1984 to qualify the SACM UD45 diesel t generator sets being supplied to Prairie Island. We have chosen to.

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t 4 c.' -Director of NRC Northem States Power Company

% September. 29,.1989

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l pursue anl alternative to the 300 " fast starts" of Subsection 7.2'.2 on the basis ofLthe extensive testing and operating experiences of SACM model p

UD45; diesels and supplemental testing to be performed on the specific diesel generator sets that are being supplied to Prairie Island. SACM has more safeguards emergency diesel units installed at nuclear plants around'the world than.any other manufacturer. Because of the large-

, number of installed UD45' diesels, a significant amount of test and in-service" data has' accumulated. This data establishes the reliability 'of the design und manufacture of the.UD45 diese1~. The qualification plan:

' attached to this letter provides a compilation of'the-extensive-test and operating data and provides the details of the testing that will be performed on the two diesel generator sets to be installed at Prairie Island. In addition to the technical justification provided by-the qualification' plan and the cost savings of not performing 300

" fast starts", the' schedule advantages this would provide will allow the

.diese1~ generators to be in-service, providing a significant safety benefit approximately.one year earlier. We request that the NRC Staff evaluate the-adequacy:of.the proposed qualification program. NRC concurrence with this proposed plan is. requested by February 1, 1990 to support our schedule.

-Please. contact us if you'have any questions related to the information we have

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i Thomas M Parker Manager Nuclear Support Services

'c: Regional Administrator - Region III, NRC Senior Resident Inspector, NRC NRR' Project Manager, NRC G Charnoff I Attachments "1. SACM Diesel Generator Qualification Report, Rev 0

2. Milestone. Schedule 1

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