ML20066H519
| ML20066H519 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 11/17/1982 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| SBN-375, NUDOCS 8211230291 | |
| Download: ML20066H519 (4) | |
Text
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SEABROM STAM IPUBLIC SERVICE Enyneering Omm Companyof NewHampeNre 1671 Worcester Road Framingham, Mossochusetts 01701 (617)- 872 - 8100 November 17, 1982 SBN-375 T.F. B7.1.2 United States Nuclear Regulatory Commission Washington, D. C.
20555 Attention:
Mr. George W. Knighton, Chief Licensing Branch 3 Division of Licensing
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) USNRC Letter, dated February 12, 1982, " Request for Additional Information," F. J. Miraglia to W. C. Tallman (c)
PSNH Letter, dated March 12, 1982, " Response to 430 Series RAIs; (Power Systems Branch)," J. DeVincent.is to F. J. Miraglia
Subject:
Revised Response to RAI 430.127; (Power Systems Branch)
Dear Sir:
We have enclosed a revised response to the subject Request for Additional Information (RAI) which was forwarded in Reference (b).
The original response to this RAI was submitted in Reference (c).
The enclosed response will be included in OL Application Amendment 48.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY
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J. DeVincentis Project Manager ALL/fsf cc: Atomic Safety and Licensing Board Service List 8211230291 821117 PDR ADOCK 05000443 A
ASLB SERVICE LIST Philip Ahrens, Esquire Assistant Attorney General Department of the Attorney General Augusta, ME 04333 Representative Beverly Hollingworth Coastal Chamber of Commerce 209 Winnacunnet Road Hampton, NH 03842 William S. Jordan, III, Esquire Harmon & Weiss 1725 I Street, N.W.
Suite 506 Washing ton, DC 20006 E. Tupper Kinder, Esquire Assistant Attorney General Office of the Attorney General 208 State House Annex Concord, NH 03301 Robert A. Backus, Esquire 116 Lowell Street P.O. Box 516 Manchester, NH 03105 Edward J. McDermott, Esquire Sanders and McDermott Professional Association 408 Lafayette Road Hampton, NH 03842 Jo Ann Shotwell, Esquire Assistant Attorney General Environmental Protection Bureau Department of the Attorney General One Ashburton Place, 19th Floor Boston, MA 02108
430.127 You state in Section 9.5.8.1 of the FSAR that the Diesel Generator (9.5.8)
Intake, Exhaust, and Crankcase Vacuum Systems are designed to ANSI B31.1 " Piping Code".
The supports for the components and piping for this system are designed in accordance with Seismic Category I requirements. You also state that the components of the system located inside the Diesel Generator Building are protected from tornado and turbine missiles. Figures 1.2-36 and 9.5-9 show that the above systems are non-seismic, non-nuclear safety and the portions of the Diesel Engine Exhaust System and Crankcase Exhaust System external to the Diesel. Generator Building are not being protected from tornado and turbine missiles. This is not acceptable. We require that the entire Diesel Generator Intake, Exhaust, and Crankcase Vacuum Systems be designed to Seismic Category I, ASME Section III, Class 3 (Quality Group C) requirements and te protected from tornado and turbine missiles.
Comply with this position.
RESPONSE
The diesel genr.rator air intake filters and exhaust silencers are not commercially available as ASME Section III, Class 3 design.
All piping and components in the Intake, Exhuast, and Crankcase Vacuum Systems are designed to Seismit. Category I requirements, and conform to Quality Group D requirements of Regulatory Guide 1.26.
(See response to Question 430.76.) The Crankcase Exhaust System is desirable, but not essential for operation of the diesel generators.
As agreed upon in a meeting with the Power Systems Branch on June 17, 1982, the following additional information, relative to the piping NDE, and periodic visual inspections of flanged joints, is provided justifying ANSI B31.1 in lieu of ASME Section III, Class 3.
This piping is designed for shop fabrication of spool assemblies to minimize the field installation effort required. Flanged joints are utilized to facilitate fit-up, and reduce the number of field welded joints. The air intake lines have only one field weld, and the exhaust lines have only two field welds. The flanged joints in the exhaust piping will be visually inspected for leakage during periodic diesel generator testing.
i The Nondestructive Examination (NDE) required for shop fabricated piping is as follows:
1.
Diesel Engine Exhaust Piping A.
Minimum requirements per ANSI B31.1:
1.
Longitudinal Buttwelds
-radiograph & visual 2.
Circumferential Buttwelds -----radiograph & visual 3.
Branch Piping Weld Joints radiograph & visual 4.
Fillet, Socket Welds ---
--mag. particle & visual ANSI B31.1 Standards describe radiography, magnetic particle and visual examinations and give acceptance standards for each.
1
i B.
Additional requirements:
visual 1.
Bolts, studs, nuts 2.
Deposited weld metal as reinforcement visual II.
Diesel Engine Combustion Air Intake Piping A.
Minimum requirements per ANSI B31.1:
1.
Longitudinal Buttwelds visual 2.
Circumferential Buttwelds
= visual 3.
Branch Piping Weld Joints
--visual 4.
Fillet, Socket Welds visual B.
Additional requirements:
1.
Bolts, studs, nuts
-visual 2.
Deposited weld metal as reinforcement visual 4
NDE for field welding is to conform to the requirements of ANSI B31.1, and is the same as itemized in I.A and II.A above.
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