ML20236K665
| ML20236K665 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 10/31/1987 |
| From: | Lippold W BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8711090303 | |
| Download: ML20236K665 (4) | |
Text
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BALTIMO RE GAS AND ELECTRIC CHARLES CENTER P.O. BOX 1475 BALTIMORE, MARYLAND 21203 W. JAMES UPPOLD Qctober 31, 1987 MANAGEFt HUCLE An ENOtNEERING SERVICES DEPARTMENT U.
S.
Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Document Control Desk
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit No. 2; Docket No. 50-318 Request for Permission to Use ASME Boiler and Pressure Vessel Code Case N-416
REFERENCES:
(a)
Code Case N-416, Alternative Rules for Hydrostatic Testing of Repair or Replacement of Class 2 Piping,Section XI, Division 1 (b)
Regulatory Guide 1.147, Inservice Inspection Code Case Acceptability, ASME Section XI, Division 1, Revision 5, August 1986 (c)
Updated Final Safety Analysis Report, Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2,
Section 4.1.3.2, Steam Generator Gentlemen:
In accordance with 10CFR 50.55a(a) (3), we are requesting permis-l sion to use the attached Code Case N-416 (Reference a) without exception.
Code Case N-416 is listed in the current edition of l
Regulatory Guide 1.147 (Reference b) as being generally accept-able to the NRC without any limitations.
The Code Case will be applied to a replacement section of 2 inch (A-106 GrB sch 80) ISI Class 2 piping (line number EB-06-2008) in the Steam Generator Blowdown System.
This piping cannot be isolated from Steam Generator No. 22 by existing valves and would require securing safety valves (see attached portion of M-36).
The option of performing a
hydrostatic test on the Steam Generator is considered to be impractical due to the existing design limitations on cycling the Steam Generators at hydrostatic test pressure (Reference c).
9 8711090303 871031 PDR ADOCK 05000318 i
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' October 31, 1987 Page 2-In. lieu of 'a hy(trostatic ~ test,
.a' system functional test and surface examination of the partial. penetration welds will be
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parformed in accordance_with Code Case N-416.
A hydrostatic test will be performed at the next regularly scheduled system hydro-static test.-
Should you have.any questions regarding this matter, we will be pleased to. discuss them with you.
Very truly yours,
[
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D. A.
Brune, Esquire J.
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Silberg, Esquire R. A..Capra, NRC S. A. McNeil, NRC W.
T.. Russell, NRC T.
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b CASE N-416 l
CASES OF ASME BOILER AND PRESSURE VESSEL CODE Approval Date: December 5,1984 See Numeric Index for expiration and any reaffirmation dates.
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Case N416 of Class 2 piping that cannot be isolated by existing Alternative Rules for Hydrostatic Testing of Repair or valves or that requires securing safety or relief valves Replacement of Class 2 Piping for isolation may be deferred untii the next regularly Section XI, Division 1 scheduled system hydrostatic tests (IWC.5000), pro-vided both of the following conditions are met.
Inquiry: For Section XI, Division 1, repair or replace-ment of Class 2 piping that cannot be isolated by exist-(a) Prior to or immediately upon return to service, ing valves or that requires securing safety or relief valves a visual examination (VT 2) for leakage shall be con-ducted dun.ng a system functional test or during a sys-for isolation, may the system hydrostatic test required by IWA4400 (IWA4210 in earlier Code editions) be de-I"" P.enice teat a the repaired or replaced portion of ferred until the next regularly scheduled system hydro-the piping system.
static test (IWC 5000) for that system?
(b) The repair or replacement welds shall be ex-amined in accordance with FA4000 and IWAJ000
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Reply: It is the opinion of the Committee that the using volumetric examination methods (IWA 2230) for system hydrostatic test required by IWA4400 (IWA-full penetration welds or surface examination methods 4210 in earlier Code editions) for repair or replacement (IWA 2220) for partial penetration welds.
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