ML20138C946

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Forwards Corrected Page 4 to 851119 Responses to NRC Questions Re Rev 3 to NSPNAD-8102.Only Production Codes May Be Used for safety-related Calculations
ML20138C946
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 12/05/1985
From: Musolf D
NORTHERN STATES POWER CO.
To:
Office of Nuclear Reactor Regulation
References
TAC-57644, TAC-57645, NUDOCS 8512130120
Download: ML20138C946 (2)


Text

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Northem States Power Company 414 Nicollet Mall Minneapolis. Minnesota 55401 Telephone (612) 330 5500 December 5, 1985 Dire .e r Office of Nuclear Reactor Regulation U S Nuclear Regulatory Commission Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 Correction of Error in the Responses of NRC Questions on Revision 3 of Topical Report NSPNAD-8102 Attached is a correction for page 4 of 5 for the attachment to our November 19, 1985 submittal of Revision 3 to Topical Report NSPNAD-8102. We apologize for any inconvenience this may have caused.

Please contact us if you have further questions.

D d M ws David Musolf Manager - Nuclear Support aervices DMM/TMP/ dab c: Regional Administrator-III, NRC NRR Project Manager, NRC Resident Inspector, NRC G Charnoff Attachment i

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Attachmsnt Page 4 of 5 1

Once all the test cases have been run and the results and comparisons have been documented, the code is approved for use by the Manager, Nuclear Analysis. At this point, the code version is archived and passworded and no changes to the source are allowed. If the code has not been reviewed and approved for use by the NRC, it is labeled as a " Developmental" code and is archived to the developmental storage area.

Currently, VIPRE is labeled a " Developmental Code". Developmental codes may not be l used for safety related calculations. If the code has been reviewed and approved for use by the NRC, it is labeled as a " Production" code and is archived to the production storage area. Only production codes may be used for safety related calculations.

Future modifications are handled in a similar manner. All previous test cases are

. rerun to ensure that the original coding is still correct. New test cases are j

developed in addition to the original ones to test all new coding added to VIPRE-01.

Once tested and approved, the new version is archived and replaces the previous version, so that there is only one approved version available for use at any one time.

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