ML20057C459

Confirms Discussions Held W/Representatives of Util on 930907-08 Re Inconsistency in TS SR 4.8.1.1.2 a.5

ML20057C459
Person / Time
Site:	Seabrook
Issue date:	09/23/1993
From:	De Agazio A Office of Nuclear Reactor Regulation
To:	Feigenbaum T NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO)
References
TAC-M87706, NUDOCS 9309280394
Download: ML20057C459 (4)

Text

,

f M%g 4

.[

h*,

UNITED STATES j

j NUCLEAR REGULATORY COMMISSION l

WASHINGTON, D C. 20556-0001 Septenber 23, 1993

=

Docket No. 50-443 Serial No. SEA-93-025 Mr. Ted C. Feigenbaum Senior Vice President and Chief Nuclear Officer North Atlantic Energy Service Corp, ration Post Office Box 300 Seabrook, New Hampshire 03874

SUBJECT:

INCONSISTENT TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENT, ELECTRICAL POWER SYSTEMS, A.C. SOURCES (TAC M87706)

This letter confirms discussions held with representatives of North Atlantic Energy Service Corporation (North Atlantic) on September 7 and 8,1993, i

regarding an inconsistency ia Technical Specification (TS) Surveillance Requirement 4.8.1.1.2 a.5.

That surveillance requirement specifies, among others requirements, that within 10 seconds after a start signal the diesel reaches a speed of at least 514 rpm and the generator frequency has stabilized i

at 60 i 1.2 Hz.

North Atlantic's procedure for determining conformance with these requirements is to verify that the generator frequency has reached at least 58.8 Hz 10 seconds after the start signal and does not exceed 61.2 Hz. Generator frequency and timing is available from the plant computer. Engine speed is not available as a computer monitored variable, but it can be obtained from local instrumentation. However, North Atlantic considers that determining engine speed timing from the frequency measurement is more accurate.

TS 4.8.1.1.2 a.5 is inconsistent in that the lower limit acceptance value specified for the direct-connected generator frequency corresponds to an engine speed of 504 rpm, but the specified minimum engine speed corresponds to the nominal frequency of 60 Hz. With regard to this surveillance specification, we consider the parameters of significance to be the frequency, voltage, and time following the start signal, i.e., the diesel-generators i

should be able to accept in the proper sequence and continue to carry safety-r related electrical loads starting 10 seconds af ter a start signal. Since the generator is directly connected to the engine and the two must turn at the same speed, the speed specification is redundant. This is recognized in the Improved Standard Technical Specifications where comparable engine speed requirements do not appear.

i We consider that a surveillance test that determines the generator frequency and voltage to be within the specified limits within 10 seconds after a start signal satisfies this portion of the surveillance requirement. However, North Atlantic is requested to propose an amendment to the operating license that j

resolves the inconsistency.

C hk k

[

b 9 "1 0 0 0 :

%,)hUk b

9309280394 930923 PDR ADDCK 05000443 p

PDR

i

?

Mr. Ted C. Feigenbaum September 23, 1993 I

The requirement affects one respondents, and therefore, is not subject to Office of Management and Budget review under CMB under P.L.96-511.

Sincerely, Original signed by:

Albert W. De Agazio, Sr. Project Manager Project Directorate I-4 Division of Reactor Projects - I/II Office of Huclear Reactor Regulation cc: See next page DISTRIBUTION:

Docket File NRC & Local PDRs PDI-4 Plant SVarga JCalvo SNorris ADeAgazio OGC ACRS (10)

JRogge RGI i

OFFluE LA:PDI-4 PM:PDI-4/lAbb' b$'PDI-4 Sdr ADeAgazio:bp JStotz WE 9/23/93

'7/S/93 3 M /93

/ /

/ /

'l DATE OFFICIAL RECORD COPY Document Name: G:\\DEAGAZIO\\87706LET

4 l-Mr. Ted C. Feigenbaum September 23, 1993 The requirement affects one respondent, and therefore, is not subject to Office of Management and Budget review under 0MB under P.L.96-511.

l Sincerely, Albert W. De Agazio, Sr.

roject Manager Project Directorate I-4 i

Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page l

l

j p

L Mr. Ted C. Feigenbaum Seabrook Station cc:

l l

Thomas Dignan, Esq.

Mr. George L. Iverson, DirectorJohn

-A. Ritsher, Esq.

New Hampshire Office.of Emergency '

J Ropes and Gray Management i

One-International Place State Office Park South

~

Boston, Massachusetts 02110-2624 107 Pleasant Street Concord, New Hampshire 03301 Mr.' Peter Brann-Assistant Attorney General Regional Administrator, Region I l

State House, Station #6 U.S. Nuclear Regulatory Commmission Augusta, Maine 04333 475 Allendale Road Resident Inspector U.S. Nuclear Regulatory Commission Office of the Attorney General-

~ Seabrook Nuclear Power Station One Ashburton Place l

Post Office Box 1149 20th Floor e

Seabrook, New Hampshire 03874 Boston, Massachusetts 02108 Jane Spector Board of. Selectmen Federal Energy Regulatory Commission Town of Amesbury j

825 North Capital Street, N.E.

Town Hall

~

Room 8105 Amesbury, Massachusetts 01913 Washington, DC 20426 Mr. Jack Dolan Federal Emergency Management Agency Mr. T. L. Harpster Region I North Atlantic Energy Service J.W. McCormack Post Office &

Corporation Courthouse Building, Room 442.

Post Office Box 300 Boston, Massachusetts 02109 l

Seabrook, New Hampshire 03874 Mr. David Rodham, Director Massachusetts Civil Defense Agency Town of Exeter 400 Worcester Road 10 Front Street Post Office Box 1496 Exeter, New Hampshire 03823 Framingham, Massachusetts 01701-0317 ATTN: c les Muckerheide Gerald Garfield, Esq.

Day, Berry and Howard Jeffrey Howard, Attorney General i

City Place G. Dana Bisbee, Deputy Attorney Hartford, Connecticut 06103-3499 General Attorney General's Office Mr. R. M. Kacich 25 Capitol Street Northeast Utilities Service Company Concord, New Hampshire 03301 Post Office Box 270 Hartford, Connecticut 06141-0270 Mr. Robert Sweeney Bethesda Licensing Office Suite 610 1

3 Metro. Center j

Bethesda, Maryland 20814-

)

i a

l

--e a

r-