ML20210B122
| ML20210B122 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 01/30/1987 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Harold Denton, Tam P Office of Nuclear Reactor Regulation |
| References | |
| 2NRC-7-020, 2NRC-7-20, NUDOCS 8702090079 | |
| Download: ML20210B122 (2) | |
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2NRC-7-020 Beaver Valley No. 2 Unit Project Organization Telecopy (412) 3 52 Ext.160 I,$,"s'oxe1$"'
January 30, 1987 2
Shippingport, PA 15077 Mr. Harold R. Denton Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Mr. Peter Tan, Project Manager Division of PWR Licensing - A Office of Nuclear Reactor Regulation
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 PSI Progran, Insulated Component Supports
REFERENCE:
1)
DLC Letter 2NRC-5-154, dated December 26, 1985 Gentlenen:
The following infonnation is provided to identify the Preservice Inspec-tion Progran Criteria and Methoaology for Visual exanination (VT-3) of conpo-nent supports which were selected for exanination where a portion of the support (within the IWF exanination boundary) is covered / buried with insu-l ation.
The insulation will not be renoved during the PSI exanination, based on the ASME Section XI, IWF 1300(e), which states in part, "Where the mechan-ical connection of a non-integral support is buried within the conponent insu-lation, the support boundary may extend fran the surf ace of the conponent insu-lation provided the support either carries the weight of the conponent or serves as a structural restraint in conpression." An alternative to the code is being utilized to include those supports not otherwise covered by this exenption.
Exceptions to the above will be:
1.
When relevant indications are observed which have been evaluated as unacceptable for continued service and which are observed adja-cent to the portion covered / buried by insulation, the insulation shall be renoved in that area and visual exanination (VT-3) shall be perfonned for the balance of the conponent support to the IWF boundary within the insulated area.
2.
When bulges or insulation distortions are observed in the coupo-nent support contiguous area.
These exceptions will apply when any canponent support has relevant indi-cations, regaroless of the exclusion by IWF 1300(e).
The Acceptance Standards for tonponent supports selected for exanination snall be in conpliance with IWF-3410, Acceptance Standards - Component Support Structural Integrity, ASME Section XI,1980 Edition, Winter 1981 Addenda.
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United States Nuclear Regulatory Connission Mr. Harold R. Denton, Director PSI Progran, Insulated Component Supports i
Page 2 i
j The above is considered as an alternative to the ASME XI PSI Progran for BVPS-2, as verbally concurred between DLC and NRR during January.5, 1987 telecon.
DUQUESNE LIGHT COMPANY l
By i
W. W Carey V
Sr. Vice President JJS/ijr l-NR/
ON/SUPP AR cc: Mr. P. Tan, Project Manager Mr. J. Beall, NRC Sr. Resident Inspector Ms. A. Asars, NRC Resident Inspector i
INP0 Records Center NRC Docunent Control Desk i
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