L-98-794, Forwards Addl Corrective Actions Re Violations Noted in Insp Repts 50-266/98-06 & 50-301/98-06.Corrective Actions:Revised Design Basis Calculations for 125 V DC Sys to Reflect Changes to Sys Made by Past Mods

Forwards Addl Corrective Actions Re Violations Noted in Insp Repts 50-266/98-06 & 50-301/98-06.Corrective Actions:Revised Design Basis Calculations for 125 V DC Sys to Reflect Changes to Sys Made by Past Mods

ML20154E180
Person / Time
Site:	Point Beach
Issue date:	09/30/1998
From:	Reddemann M WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
50-266-98-06, 50-266-98-6, 50-301-98-06, 50-301-98-6, NPL-98-0794, NPL-98-794, NUDOCS 9810080082
Download: ML20154E180 (2)

Text

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' MARK E. REDDEMANN g gg sitj Mc3 President A WISCONSIN ENERGY COMPANY Point Beach Nuclear Plant 6610 Nuclear Rd.

Two Rivers. WI 54241 Phone 920 755-6527 NPL 98-0794 10 CFR 2.201 September 30,1998 Document Control Desk U. S. NUCLEAR REGULATORY COMMISSION Mail Station Pl-137 Washington,DC 20555 Ladies / Gentlemen:

DOCKETS 50-266 AND 50-301 NRC INSPECTION REPORTS 50-266/98006 AMD 50-301/98006 POINT BEACH NUCLEAll PLANT. UNITS 1 AND 2 j In a letter dated June 3,1998, Wisconsin Electric forwarded our response to the subject inspection ,

report. The inspection report included a Notice of Violation (NOV) that identified three violations ~

of NRC requirements. Our response to the NOV included corrective actions to address each of the identified violations, i

Our response stated we had reviewed our DC loading calculations of record and all of the changes resulting from modifications that have not been formally included, and had verified that system design basis capability is maintained in all cases. In addition, we proposed the following additional corrective actions to address this violation:

1. Design basis calcidationsfor the 125 YDC system will befonnally revised to reflect the changes to the system made bypast modifications. As part of the effort, the set of calculations will be restructured to minimize the number ofcalculations which require updatefor any given plant change. This effort will be completed by September 30,1998.

2. NP 7.2.4 will be revised to allowfor the evaluation and documentation of the effects ofplant 1

modifications on the results or conclusions of calctdations withoutformal revision ofthe calculation. These changes willinchide implementation ofcontrols that ensure that users of

' a calcidation will be aware ofand have access to evaluations that have not been incorporated into the calculation via revision. Criteria will be developed to limit the age and/or number ofsuch evaluations. NP 7.2.4 will be revised by September 30,1998.

3. Procedures NP 7.2.2, " Design Control, " and NP 7.2.4 will be revised to require completion ofa documented evaluationforpending changes to plant calculations (as described above) orformal revision ofaffected cah,dations prior to the closcout ofplant design changes. >

These procedures will be revised by September 30,1998.

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,PDR,OCK AD 05000266 G PDR j l

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. NPL 98-0794 09/30/98 Page 2 Action Items 2 and 3 have been completed as scheduled. However, the corrective actions we have committed to in Item I will not be completed by that date. Revisions to the 125 V DC system l calculations have taken longer to prepare than planned. These calculations were received from our j

contractor on September 22,1998, and are in the process of being reviewed. Although we I anticipate completing our initial review of these calculations within the next week, additional time '

for the comment resolution process is needed. Additional revisions, if required, and final approval of the calculations will be completed by November 30,1998.

As committed in the second part ofItem 1, during the preparation of the calculation revisions, this set ofcalculations was reviewed to determine if the calculations could be restructured to possibly minimize the number of calculations needing updates for a given design change. We detemiined that the current calculation set is already minimized. There is very little overlap between the different calculations in the set. Therefore, the current calculation set is not being restructured, .

since it would not decrease the amount of work needed to reflect a design change. l If you have any questions or require additional information regarding this commitment change, please contact me.

Sincerely, (K Mark E. Reddemann Site Vice President Point Beach Nuclear Plant CWK\dms cc: NRC Resident Inspector NRC Project Manager NRC Regional Administrator PSCW

Text

. .. .. .~.

' MARK E. REDDEMANN g gg sitj Mc3 President A WISCONSIN ENERGY COMPANY Point Beach Nuclear Plant 6610 Nuclear Rd.

Two Rivers. WI 54241 Phone 920 755-6527 NPL 98-0794 10 CFR 2.201 September 30,1998 Document Control Desk U. S. NUCLEAR REGULATORY COMMISSION Mail Station Pl-137 Washington,DC 20555 Ladies / Gentlemen:

DOCKETS 50-266 AND 50-301 NRC INSPECTION REPORTS 50-266/98006 AMD 50-301/98006 POINT BEACH NUCLEAll PLANT. UNITS 1 AND 2 j In a letter dated June 3,1998, Wisconsin Electric forwarded our response to the subject inspection ,

report. The inspection report included a Notice of Violation (NOV) that identified three violations ~

of NRC requirements. Our response to the NOV included corrective actions to address each of the identified violations, i

Our response stated we had reviewed our DC loading calculations of record and all of the changes resulting from modifications that have not been formally included, and had verified that system design basis capability is maintained in all cases. In addition, we proposed the following additional corrective actions to address this violation:

1. Design basis calcidationsfor the 125 YDC system will befonnally revised to reflect the changes to the system made bypast modifications. As part of the effort, the set of calculations will be restructured to minimize the number ofcalculations which require updatefor any given plant change. This effort will be completed by September 30,1998.

2. NP 7.2.4 will be revised to allowfor the evaluation and documentation of the effects ofplant 1

modifications on the results or conclusions of calctdations withoutformal revision ofthe calculation. These changes willinchide implementation ofcontrols that ensure that users of

' a calcidation will be aware ofand have access to evaluations that have not been incorporated into the calculation via revision. Criteria will be developed to limit the age and/or number ofsuch evaluations. NP 7.2.4 will be revised by September 30,1998.

3. Procedures NP 7.2.2, " Design Control, " and NP 7.2.4 will be revised to require completion ofa documented evaluationforpending changes to plant calculations (as described above) orformal revision ofaffected cah,dations prior to the closcout ofplant design changes. >

These procedures will be revised by September 30,1998.

sL,'!( -

, og ; f COk,:,D i 19  :

,PDR,OCK AD 05000266 G PDR j l

l

. NPL 98-0794 09/30/98 Page 2 Action Items 2 and 3 have been completed as scheduled. However, the corrective actions we have committed to in Item I will not be completed by that date. Revisions to the 125 V DC system l calculations have taken longer to prepare than planned. These calculations were received from our j

contractor on September 22,1998, and are in the process of being reviewed. Although we I anticipate completing our initial review of these calculations within the next week, additional time '

for the comment resolution process is needed. Additional revisions, if required, and final approval of the calculations will be completed by November 30,1998.

As committed in the second part ofItem 1, during the preparation of the calculation revisions, this set ofcalculations was reviewed to determine if the calculations could be restructured to possibly minimize the number of calculations needing updates for a given design change. We detemiined that the current calculation set is already minimized. There is very little overlap between the different calculations in the set. Therefore, the current calculation set is not being restructured, .

since it would not decrease the amount of work needed to reflect a design change. l If you have any questions or require additional information regarding this commitment change, please contact me.

Sincerely, (K Mark E. Reddemann Site Vice President Point Beach Nuclear Plant CWK\dms cc: NRC Resident Inspector NRC Project Manager NRC Regional Administrator PSCW