ML20134G443

Forwards Integrated Insp Rept 50-213/96-10 on 960811-0920.No Violations Noted

ML20134G443
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	11/05/1996
From:	Rogge J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	Feigenbaum T NORTHEAST UTILITIES SERVICE CO.
Shared Package
ML20134G446	List: IR 05000213/1996010 ML20134G443
References
NUDOCS 9611130202
Download: ML20134G443 (3)

See also: IR 05000213/1996010

Text

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November 5,1996 i

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Mr. Ted C. Feigenbaum  !

Executive Vice President and Chief Nuclear Officer l

Northeast Utilities Service' Company

c/o Mr. Terry L. Harpster j!

- P.O. Box 270 .!

l Hartford, Connecticut 06141-0270

. SUBJECT: NRC INTEGRATED INSPECTION REPORT 50-213/96-10 f

j Dear Mr. Feigenbaum:

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On September 23,1996, the NRC completed an inspection at Connecticut Yankee Atomic ~,

l Power Company. The enclosed report presents the results of that inspection. #4 (

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! During the six-week period covered by this inspection period, the conduct of activities at '

l the Haddam Neck Station. facility was generally characterized by efforts to transition from a  !

! maintenance outage to the early start of the cycle 19 refueling outage. ' The reactor was  ;

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partially drained and vented when the reactor disassembly sequence was placed on hold on i

August 30. Several significant events occurred which challenged reactor cooling and. )

i inventory control: a through wall leak was identified on the inlet valve for the "A" residual l

heat removal (RHR) heat exchanger on August 30; and, on September 1 the operators l

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l discovered that about 5000 gallons of reactor coolant system (RCS) inventory was

inadvertently drained when a nitrogen bubble accumulated in the reactor head, and the "B"

l' RHR pump failed as the operator tried to start it.

l The plant management and staff failed to appreciate the significance of the nitrogen bubble

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event and systematically under reacted to the event initially. These events were safety

significant and revealed deficiencies in operations procedure quality, operator use of

procedures, deficiencies in plant material conditions, inadequacies on work control, and

poor plant staff sensitivity to the control of shutdown risk. These events revealed

fundamental weaknesses and broad concerns in the overall conduct of operations of

Haddam Neck. In a letter dated October 9,1996, the NRC requested that you include the

above issues in the corrective action plans prior to plant restart. Other NRC findings

related to this event are described in NRC Inspection 96-80.

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Mr. Ted C. Feigenbaum 2

In accordance with 10 CFR 2.790 of the NRC's " Rules of Practice," a copy of this letter

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and its enclosure will be placed in the NRC Public Document Room (PDR).

Sincerely,  ;

Original Signed By:

John F. Rogge, Chief

Projects Branch 8 j

Division of Reactor Projects '

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Docket No. 50-213  ;

License No. DPR-61 l

Enclosure: ,

1. NRC Integrated Inspection Report No. 50-213/96-10

cc w/ encl:

B. D. Kenyon, President and Chief Executive Officer - Nuclear Group

D. Goebel Vice President - Nuclear Oversight

J. Thayer, Vice President - Nuclear Engineering and Support Recovery Office

F. C. Rothen, Vice President - Work Services

J. J. LaPlatney, Haddam Neck Unit Director

L. M. Cuoco, Senior Nuclear Counsel

J. E. Van Noordenen, Licensing Manager - Haddam Neck

H. F. Haynes, Director - Training

l J. F. Smith, Manager, Operator Training

W. D. Meinert, Nuclear Engineer

State of Connecticut SLO

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i Mr. Ted C. Feigenbaum 3

Distribution w/ encl:

Region i Docket Room (with concurrences) l

D. Screnci, PAO  !

J. Rogge, DRP

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NRC Resident inspector

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M. Conner, DRP '

C. O'Daniell, DRP l

Nuclear Safety Information Center (NSIC)

PUBLIC l

Distribution w/enci (VIA E-MAIL): i

W. Dean, OEDO

P. McKee, NRR/PD l-4

S. Dembek, PM, NRR

R. Jones, NRR

R. Correia, NRR (RPC)

R. Frahm, Jr., NRR (RKF)

Inspection Program Branch, NRR (IPAS)

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l DOCUMENT NAME: G:\ BRANCH 8\HN\HN9610. INS

j To receive a copy of this document, indicate in the box: "C" = Copy without

attachment / enclosure ,"E" = Copy with attachment / enclosure "N" = No copy

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OFFICE Rl/DRP [fG Rl/DRP fjo -

l NAME WJRAYMOND JFROGGl* V

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l DATE 11/05/96 11/(/96

OFFICIAL RECORD COPY

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