ML20005A774
| ML20005A774 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 06/26/1981 |
| From: | Sylvia B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Clark R, Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 311A, NUDOCS 8107010232 | |
| Download: ML20005A774 (2) | |
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VraGINIA Ex.ncraIC AND Powna CoxPANY Racmasown,VamoxxxA naast June 26, 1981 Mr. Harold R. Denton, Director Serial No. 311A Office of Nuclear Reactor Regulation N0/DCW:acm Attn.
Mr. Robert A. Clark, Chief Docket No. 50-339 Operating Reactors Branch No. 3 License No. NPF-7 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Gentlemen:
In our letter of May 22, 1981, Serial No. 311, we included an attachment, Table 4, in which we inadvertantly omicted the operability criteria used for pumps and valves.
Attached is a revised Table 4 for your review.
Please contact us if you have any further questions.
Very truly yours.
[
B. R. Sylvia Manager - Nuclear Operations and Maintenance Attachment ec:
Mr. James P. O'Reilly, Director Office'of Inspection and Enforcement Region II Atlanta, Georgia 30303 ey' (9
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"'UP 301981u 5' '* g p f; to f 8167010232-9
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TABLE 4 NORTH ANNA UNIT 2 MULTISTRUCTURE ARS OPERABILITY CRITERIA Operability review shall be performed for the Design Banis Earthquake (DBE) loadcase.
Non-linear static and dynamic analysis is permissible for operability review.
Maximum Allowable Stress in Pipe 2.4 S Class 2 & 3 ~ or 3.0S Class 1 h
(Note 1)
' Maximum Allowable Stress in Pipe Lesser of.7 Ultimate Stress or 1.2 Support & Base Plate Yield Stress (Note 2)
Maximum Allowable Bolt Tensile Ioad 1/2 Ultimate Pullout Load (Note 3)
Maximum Load on Snubber One-time Allowable Load Rating given in Grinnell Catalog PH-74 Maximum Load on Pumps and Valves Operability check in accordance with vendor requiremento NOTES:
1)
Based on Subsection NB-3600 (Class 1) and NC-3600 (Class 2 & 3) of the AMSE Section III Boiler & Pressure Vessel Code 1980.
2)
Based on Appendix F, Article F 1370 of the ASME Section III Boiler &
Pressure Vessel Code 1977 and Addenda up to summer 1979.
3)
Lased on I & E Bulletin 79-02.
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