ML20024F234
| ML20024F234 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 08/31/1983 |
| From: | Terao D Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20024F233 | List: |
| References | |
| ISSUANCES-OL, NUDOCS 8309090102 | |
| Download: ML20024F234 (2) | |
Text
____
UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION O
BEFORE THE ATOMIC SAFETY AND LICENSING APPEAL BOARD In the Matter of UNION ELECTRIC COMPANY Docket Nos. STN 50-483 OL e
(CallawayPlant, Unit 1)
AFFIDAVIT OF DAVID TERA 0 I, David Terao, being duly sworn, do depose and state:
1.
I am employed by the U.S. Nuclear Regulatory Comission as a Mechanical Engineer in the Office of Nuclear Reactor Regulation, Division of Engineering, Mechanical Engineering Branch.
2.
My involvement in the Callaway Plant results from my ongoing work assignment as the technical reviewer of the mechanical '.omponent and component support design used at the Callaway Plant.
I have been involved in the review of the SNUPPS FSAR and have prepared input for the Callaway Safety Evaluation Report and supplements.
3.
I have reviewed the Applicant's response to the Appeal Board l
Order of August 15, 1983 and submit the following views.
4.
The Staff agrees with the Applicant's response that the 882 psi is not a hydrostatic test pressure value to be used for all SA-312 piping.
The hydrostatic test pressure referred to by the Applicant 13 calculated by using the equation in ASME Specification SA-530, " Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe." The l'
hydrostatic test pressure will vary with different size pipe outside l
diameters and with different wall thicknesses. A larger diameter pipe, 8309090102 830831
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with a thicker pipe wall to accummodate a Design Pressure of 2485 psi, would be hydrostatically tested to a correspondingly higher pressure.
5.
The Staff further agrees with the Applicant in that the deter-mination that additional testing was not required for SA-312 piping used in systems having a hoop stress less than 85 percent of the ASME allowable stress was based on the use of a longitudinal weld efficiency factor of 0.85 for a butt weld without filler metal and was not based on the hydrostatic test pressure of 882 psi.
6.
The Applicant has stated that the particular piece of pipe with the design pressure of 2485 psi shown in Applicant Exhibit 10, Enclosure 5, page 4, is not SA-312 piping but, instead, is SA-358.
7.
The ASME Specification SA-530 hydrostatic test requirement for SA-358 type 304 schedule 140 pipe with a 10-inch nominal outside pipe diameter and wall thickness of one inch is 2791 psi (rounded up to 2800 psi).
8.
For an SA-358 type 304 pipe with a 10-inch nominal outside pipe diameter, the minimum required pipe wall thickness, per NC-3641 for an internal pipe pressure of 2485 psi is 0.78 inches.
I hereby certify that the statements and opinions given are true and correct to the best of my personal knowledge and belief.
~
David Terao Subscribed and sworn to before me this 31 day of Aupt 1983 HFSt
%%th besch8A fG Notary Public
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My commission expires:7 /l/86
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