ML20212G975

Forwards Draft write-up Re OI 16 for F Grubelich to Consider

ML20212G975
Person / Time
Site:	Calvert Cliffs
Issue date:	05/12/1999
From:	Shaw D BALTIMORE GAS & ELECTRIC CO.
To:	Anand R NRC
Shared Package
ML20212G964	List: ML20212G960 ML20212G975 ML20212G985 ML20212G989 ML20212H018 ML20212H024
References
NUDOCS 9909300174
Download: ML20212G975 (2)

Text

MAY-22-1999 06 44 BALTIMORE GAS & ELECTRIC 410 495 6946 P.01/01 May 12,1999

( To: Raj Anand Phone: 301-415-1146 Fax: 301-415-1032 Fromi Don Shaw Phone: 410-495-4028 Fax 410-495-6946 Pages: 1 Gust this coverpage)

Comments:

Raj, Here is a draft write-up regarding OI 16, for Frank Grubelich to consider.

Thanks,

' Don Open Item 3.2.3.2.4-1 l l

'g' The applicant should present a discussion of the accuracy of visual examinations required to provide l i

reliable measurements of detectable west used to assess the performance of the hold dova ring in managing the aging effects of wear.

BGE Response Resolution requirements for RV1 visual examinations are currently: ... " resolve a 1/32 inch thick black line to an 18 percent neutral gray card." Alternatives are allowed if approved for use by the BGE LevelIII VT Examiner.

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PDR TOTAL P.01 a _ - . , . -

JLt4-16-1999 -96:54 BALTIMORE CAS & ELECTRIC 410 495 6946 P. 02,'02

1. Draft response to OI 3.10.3.2.2-1

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BOE considers the environment on the surfaces of the concrete walls of the Intake Stmeture to be more aggressive on the bay water side than on the soil side. This is based on the chemical analysis data previously submitted as well as a lower exposure to oxygen on the soil side. Therefore, we will rely on visual inspections performed on the bay water side to, verify that no significant degradation of the concrete surfaces on the soll side is occurring. 'Ihe Intake Structure intake cavity walkdowns are periodically performed I during refueling outages (when the intake cavities are dewatered) under CCNPP Maintenance Program procedure MN-1-319, " Structure and System Walkdowns." If q significant evidence ofdegradation is discovered on the bay water side, an assessment of j the potential for similar degraded conditions on soil side will be made. MN-1-319 will be modified to assure this assessment ofpotential degradation on the soil side is made. The assessment and any required corrective actions would be conducted in accordance with the Corrective Actions Program.

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