ML20196F451
| ML20196F451 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 02/24/1988 |
| From: | Lippold W BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| RTR-REGGD-01.147, RTR-REGGD-1.147 NUDOCS 8803040019 | |
| Download: ML20196F451 (4) | |
Text
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BALTIMORE GAS AND ELECTRIC CHARLES CENTER P. O. DOX 1475 BALTIWORE,WARYLAND 21203 W. JAnMES LW'OL.D
.antui e~o a:Uw.o be cemtws, February 24, 1988
.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. I and 2, Section 4.1.3.2, Steam Generator Gentlemen:
In accordance with 10CFR 50.55a (a) (3), we are requesting permission to use the attached Code Case N-416 (Reference A) without exception.
Code Case N-416 is listed in the current edition of Regulatory Guide 1.147 (Reference B) as being generally acceptable to the NRC with no limitations.
Footnote 6 to 10CFR 50.55a pertnits the use of Code Cases upon authorization by the Director of the Office of Nuclear Reactor Regulation.
The Code Case will be applied to a replacement of sections of 2 inch ISI Class 2 piping in the Steam Generator Blowdown System upstream of isolation valves.
The requirement in IWA 4400 to perform a hydrostatic test af ter replacements is impractical because the replacement piping cannot be isolated from Steam Generators; hydrostatic testing would result in cycling the Steam Generators.
Design limitations on cycling the Steam Generators at hydrostatic test pressure is contained in Reference C.
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i hekt 8803040019 880224 L
PDR ADOCK 05000318
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PDR 90
Document Control Desk February 24, 1988 Page ?
In order to ensure an acceptable level of quality and safety, a system functional test and surface examination of the partial penetration welds will be performed in lieu of a hydrostatic test and in accordance with Code Case N 416.
A hydrostatic test will be. performed at the next regularly scheduled system hydrostatic test.
This request was previously approved for one section of Steam Cenerator Blowdown System piping, by letter dated October 31, 1987 from R.
A.
Capra to J. A.
Tiernan.
Permisrion to apply Code Case N 416 is being requested at this time in anticipation of additional replacements during a Calvert Cliffs Unit 2 maintenance outage scheduled for February 26, 1988.
Pursuant to 10CFR 170.21, BG&E Check No. 1196330 in the amount of
$150.00 is enclosed.
Should you have any questions regarding this matter, we will be pleased to discuss them with you.
Very truly yours.
?
WJL/LMD/j ls Enclosure cc:
D. A. Brune, Esquiro J. E. Silberg, Esquire R. A. Capra, NRC S. A. McNeil, NRC W. T. Russell, NRC D. C. Trimble, NRC T. Magette, DNR
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v Document Control Desk.
February 24, 1988 Page 3
-bec: zJ. A.'Tiernan'
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P. E.=Katz/R. C.-L.-Olson C. H. Cruse /R. F. Ash R. E. Denton/J.-A. Mihalcik.
- R. M. Douglass/S. ~ E. Jones, Jr.
LT. N. Pritchett/M.' Cavrilas/E I. Bauereis-J.-'R. Lemons /R. P; Heibol W. J. Lippold/A, R. Thornton F.. J. Munno R. B; Pond Jr./R. E. Cantrell L. B. Russell /J.' T. Carroll' R. C. DeYoung C. M. Rice' R. C. Staker W. R. Horlacher,- III U. L. Shaw, Jr.
L. S. Larragoite P. E. McCrane M. E. Bowman /L E. Salyards B. C. Rudell/K. M.-Hoffman/L. M. Decker T. L. Sydnor
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CASE N-416 CASES OF ASME BOILER AND PRESSURE VESSEL CODE 4
Approval Date: December 5,1984 See Numeric hulisx for rapiretion and any reaffirmation detes.
Ceu N 416 of Class 2 piping that ennot be isolated by existing Alternative Rules for Hydrostatic Testing of Repair or valves or that requires t,ccuring safety or relief valves Replacement of Class 2 Piping for isolation may be deferred until the next regularly Section XI, Division 1 scheduled system bydrostatic tests (IWC-5000), pro-vided both of the following conditions are met.
Inquiry: For Section XI Division 1, repair or replace-M Pdor wor Wi% p e w e-im ment of Class 2 pipmg that cannot be isolated by exist-a visual examination (VT 2) for leakage shall be con -
mg valves or that requires securing safety or relief valves ducted during a system functional test or during a sve-for uolation, may the system hydrostatic test required by IWA4400 (INA4210 in earlier Code editions) be de.
tent pservice test in the repaired or replaced portion of the pipmg system.
ferred until the next regularly scheduled system hydro-static test (IWC 5000) for that system?
(6) The repair or replacement welds shall be ex.
amined in accordance with IWA 4000 and IWA 7000 -
Replyr it is the opinion of the Comm'ttee that the using volumetric examination methods (IWA 2230) for system hydrostatic test required by IWA4400 (IWA-full penetration welds on surface examination methode 4210 in earlier Code editions) for repair or replacement (IWA 2220) for partial penetration welds.
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