ML20141M784

Forwards Staff Comments on Seismic & Operability Qualification Review of Equipment for FSAR Sections 3.9 & 3.10

ML20141M784
Person / Time
Site:	Seabrook
Issue date:	02/14/1986
From:	Nerses V Office of Nuclear Reactor Regulation
To:	Harrison R PUBLIC SERVICE CO. OF NEW HAMPSHIRE
References
NUDOCS 8602280195
Download: ML20141M784 (4)

Text

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FE8 I41986 Docket Nos.: 50-443 and 50-444 Mr. Robert J. Harrison President & Chief Executive Officer Public Service Company of New Hampshire Post Office Box 330 Manchester, New Hampshire 03105

Subject:

Seismic Qualification Review of Equipment Enclosed for your use are staff comments on the seismic and operability qualification review of equipment.

Questions or additional information regarding this matter should be directed to the Seabrook Project Manager, Mr. Victor Nerses (301) 492-8535.

Sincerely, OlliGINAL SIGHED BY Victor Nerses, Project Manager PWR Project Directorate No. 5 Division of PWR Licensing-A

Enclosure:

As stated cc: See next page DIS _TRIBUTION cDocket File NRC PDR LPDR JPartlow PWR5 Reading FRosa VNerses 0 Lasher MRushbrook VNoonan Attorney),

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Public Service Company of New Hampshire Seabrrok Nuclear Power Station cc

l Thomas Dignan, Esq. E. Tupper Kinder, Esq.

John A. Ritscher, Esq. G. Dana Bisbee, Esq.

Ropes and Gray Assistant Attorney General 225 Franklin Street Office of Attorney General Boston, Massachusetts 02110 208 State House Annex Mr. Bruce Beckley, Project Manager Public Service Company of New Hampshire Resident Inspector

! Post Office Box 330 Seabrook Nuclear Power Station i Manchester, New Hampshire 03105 c/o U.S. Nuclear Regulatory Comm.

Post Office Box 700 Dr. Murray Tye, President Seabrook, New Hampshire 03874 Sun Valley Association 209 Sumer Street Mr. John DeVincentis, Director Haverhill, Massachusetts 08139 Engineering and Licensing 1 Yankee Atomic Electric Company Robert A. Backus, Esq. 1671 Worchester Road O'Neil, Backus and Spielman Framingham, Massachusetts 01701 116 Lowell Street Manchester, New Hampshire 03105 Mr. A.M. Ebner, Project Manager United Engineers & Constructors Mr. Phillip Ahrens, Esq. 30 South 17th Street Assistant Attorney General Post Office Box 8223 State House, Station #6 Philadelphia, Pennsylvania 19101 Augusta, Maine 04333 William S. Jordan III Mr. Warren Hall Diane Curran Public Service Company of Harmon, Weiss & Jordan New Hampshire 20001 S. street NW Post Office Box 300 Suite 430 Seabrook, New Hampshire 03874 Washington, D.C. 20009 Seacoast Anti-Pollution League Jo Ann Shotwell, Esq.

Ms. Jane Doughty Office of the Assistant Attorney 5 Market Street General Portsmouth, New Hampshire 03801 Environmental Protection Division One Ashburton Place Ms. Diana P. Randall Boston, Massachusetts 02108 70 Collins Street Seabrook, New Hampshire 03874 D. Pierre G. Cameron, Jr., Esq.

General Counsel Richard Hampe, Esq. Public Service Company of New New Hampshire Civil Defense Agency Hampshire 107 Pleasant Street Post Office Box 330 Concord, New Hampshire 03301 Manchester, New Hampshire 03105 Regional Administrator, Region i U.S. Nuclear Regulatory Comission 631 Park Avenue King of Prussia, Pennsylvania 19406

Public Service Company of Seabrook Nuclear Power Station New Hampshire l

l cc:

Mr. Calvin A. Canney, City Manager Mr. Alfred V. Sargent, City Hall Chairman 126 Daniel Street Board of Selectmen Portsmouth, New Hampshire 03801 Town of Salisbury, MA 01950 Ms. Letty Hett Senator Gordon J. Humphrey Town of Brentwood ATTN: Tom Burack RFD Dalton Road U. S. Senate Brentwood, New Hampshire Washington, D.C. 20510 Ms. Roberta C. Pevear Senate ordon J. Humphrey Town of Hampton Falls, New Hampshire ATTN: o b Boynton Drinkwater Road 1 Pills w ry Street Hampton Falls, New Hampshire 03844 Concord, New Hampshire 03301 Ms. Sandra Gavutis Mr. Owen B. Durgin. Chairman Town of Kensington, New Hampshire Durham Buard of Selectmen RDF 1 Town of Durham East Kingston, New Hampshire 03827 Durham, New Hampshire 03824 Chairman, Board of Selectmen Charles Cross, Esq.

Town Hall Shaines, Hardrigan and South Hampton, New Hampshire 03827 McEaschern 25 Maplewood Avenue Mr. Angie Machiros, Chairman Post Office Box 366 Board of Selectmen Portsmouth, New Hampshire 03801 for the Town of Newbury Newbury, Massachusetts 01950 Mr. Guy Chichester, Chairman Rye Nuclear Intervention Consnittee Mr. Cashman, Chairman c/o Rye Town Hall Board of Selectmen 10 Central Road Town of Amesbury Rye, New Hampshire 03870 Town Hall Amesbury, Massachusetts 01913 Jane Spector Federal Energy Regulatory Honorable Richard E. Sullivan Consnission Mayor, City of Newburyport 825 North Capitol Street, N.E.

Office of the Mayor Room 8105 City Hall Washington, D.C. 20426 Newburyport, Massachusetts 01950 Mr. R. Sweeney Mr. Donald E. Chick, Town Manager New Hamphire Yankee Division Town of Exeter Public Service Company of New 10 Front Street Hampshire Exeter, New Hampshire 7910 Woodmont Avenue Mr. William B. Derrickson Senior Vice President Public Service Company of New Hampshire

Post Office Box 700, Route 1 Seabrook, New Hampshire 03874 L

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l SQRT REVIEW COMMENTS FOR l SEABROOK FSAR SECTIONS 3.9 AND 3.10 l

! 1. Thaservicewaterpump(JohnstonPumpCo.Model30DC,2StageVertical l purp with a GE 600 HP Model SK pump motor) is a deep well pump with a first natural frequency much below 33 Hz. The dynamic analysis of the motor was performed by Mcdonald Engineering Aralysis Co. The analysis

of this pump should be examined for possible excessive end deflections if the pump is not supported laterally. Large end deflections could affect the operability of the pump (see FSAR Section 3.9(D).3.2.a.).

l 2. Some pump rotors were analyzed in a "non-standard" way as described in l Section 3.9(B).3.2.a. of the FSAR. A paragraph from the FSAR describing this analysis is shown below.

To avoid damage during the faulted plant condition, three areas of analysis are performed on the motor: the supports, the rotor assembly, and the motor stator frame. The supports, bolts, and the stator frame are analyzed for deadweight, operating loads, and seismic loads and the stress limits are those of the AISC Manual of Steel Construction. Deflection of the rotor shaft was compared to the clearance between the stator and the rotor, to ensure that rubbing-type failure will not occur. The angular and parallel shaft deflections at the coupling were calculated and compared to the allowables for the coupling. Rotor shaft stresses and bearing loads were evaluated and compared to allow-ables for the faulted plant conditions.

Information should be added to the described FSAR analysis that justifies the use of faulted condition stress allowables in demonstrating operability of motors.

3. In the discussion of the Valve Operability Assurance Program (FSAR Section 3.9(8).3.2.b., Amendment 48) it was stated that a 1.5 factor is applied to the input motion and compliance to IEEE 344-1975 is achieved. USNRC Regulatory Guide 1.100 requires that the test response spectra be broad band if more than one natural frequency below 33 Hz exists since the use of a single frequency test input with a 1.5 magnification factor may not always be adequate to excite all modes of the equipment to the required levels.

4. InSections3.9(B).3.3.a.and3.9(B).3.3.b., Amendment 45,thestress analysis of the piping systems upstream and downstream of the safety and relief valves was performed using the maximum force in each leg (found from a RELAP 5 analysis of the system) multiplied by a dynamic load factor of 2.0 (f rom USNRC Regulatory Guide 1.67) applied Statically to each leg of the piping system in the most conservative manner.

However, the methods of Regulatory Guide 1.67 are limited to safety l valve and relief valve piping systems "which have inlet piping that l

neither contains a water seal nor is subject to slug flo.4 of water upon discharge of the valves".

5. No connents on Section 3.10.