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STONE TJ YlEBSTER ENGINEERING CORPORATION 245 SuMutn SrREET. B O STON. MASSACHUSETTS                                            ,;
AD DRE S S ALL CORRE S POND EN CE TO P.O. B OX 2.325. BOSTON. M A SS. 02107
: w. U. T E y E M-44 0009                      ,
oma sfeucTiose
  ,          o    y a E  ne avions usvom
                              "'' "                                                                              Emo = ta no
                ".'o',^ 1*:i msn. .oTo . o c.
Mr. Victor Stello, Director                                                          July 23, 1980 Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555                                            -
{g J $~f, o c) 3
 
==Dear Mr. Stello:==
NOTIFICATION OF DEFECT, 10CFR21 SHOREHAM NUCLEAR POWER STATION - UNIT I LONG ISLAND LIGHTING COMPAST Stone & Webster Engineering Corporation (S&W), pursuant to the provisions of 10CFR21, hereby provides notification of a " defect" concerning the Shoreham Nuclear Power Station, Unit 1, owned by Long Island Lighting Company (LILCO) and for which S&W provided both engineering and construc-tion services.
In accordance with 'the requirements of Section 21.21(b)(3), the followini; information is submitted:
: 1. Name and address of the individual informing the Commission:
Mr. P. A. Wild, Director of Engineering                                            ,
Stone & Vebster Engineering Corporation Post Office Box 2325 Doston, MA 02107
: 2. Identification        '
the facility, or the basic component supplied for such facilia , which contains a defect:
j                                        Shoreham Nuclear Power Station, Unit 1 General Electric Company (GE) 4 kV switchgear circuit breaker - Snap Rings
: 3.      Identification of firm constructing facility or supplying basic component which contains a defect:
Basic Component supplied by GE                          ,
8008270/fd
 
y          -
    "b - -  .
VS                                  2            July 23, l930            .
4  Nature o_f the defect and the safety harard which could be        .
created by such defect:                        '.,
  ' ^                                              '
There exists a depa *"- #--- -' * -' # al require ents of a procure =ent docu=ent in that breakers could have          .
failed to cperate as specified.
The defective circuit breakers are basic cc:pe:ents in GE metal-clad switchgear (4 kV) and the switchgear has been delivered to a purchaser.
As a result of loose breaker =ain output cracks, other links in the breaker =echanis eved cut of alig=:ent and i=pacted ' the prep pin snap ring. The effect of these i= pacts def =:ed the snap ring sufficiently to allcw it to fall off the prep pin. This could result in the failure of the-breaker to operate properly.
The breakers are required tader design basis events to assure the capability to shut down the reactor and
                              =aintain it in a safe shutd:w cceditice. Degradatics of such essential safety-related equipment rep' resents a
                              =ajor reductic: in the degree cf protection provided to the public health and safety and results in a substantial safety harard.
: 5. Date on dhich infor:stic of such defect was obtained:
July 23, 1930
: 6. In the case of a basic co:ponent which ccatsics a defect, the number and location of all such ce=penents in use at, supplied for, or being supplied for facilities subject to the regulatica:
Shoreham Nuclear Power Statics 4 kV sdithgear circuit breakers of which 29 are used in safe'ty-related applicacica.
: 7. The corrective action which has been, is being, or will be
          ,            taken; name of individual or crganization respensible; and length of time taken to co=plete the action:
All 65 breakers at the Shoreham site were returned to GE for corrective work. Corrective actie censisted of cc:plete disasse=bly of.each breaker =echanis: for inspectics with replace =ent of parts as necessary.
GE factory engineering and Quality Assurance grcups have l                            been apprised of this preble: to prevent recurrence.
The ide=tified corrective actica has been c epleted.
a
                                                                                  =
 
~ 1 f-.,
VS                                      3                      July 23, 1980
: 8. Advice related to the defect that has been given to purchasers or, liceitsees :      ;p-  .
No other actica apart frem that specified under the previous section.
Identification of this defect and the filing of this report are results of a review of 10CFR50.55(e) Reports and Licensee Event Report,s filed by S&W clients since January 6, 1978. This review, committed to.in our letter to NRC of September 6, 1979, resulted from the NRC special inspection of May 1-4, 1979. NRC has been previously advised of this problem by LILCO n:tification on November 17, 1978, in accordance with 10CFR50.55(e).
If you require any further infor=ation, please contact S. B. Jacobs at 617-973-5264.
Very truly yours, e
          ~ .y          b        .
P. A. Wild Director of Engineering PAS:mra
                                    ~
4 t
e
                                                                                                .m-}}

Latest revision as of 12:28, 18 February 2020

Part 21 Rept Providing Notification of Defective Circuit Breakers in GE metal-clad Switchgear.Caused by Degradation of Essential safety-related Equipment.All Breakers Were Returned to GE for Corrective Work
ML19331D056
Person / Time
Site: Shoreham File:Long Island Lighting Company icon.png
Issue date: 07/23/1980
From: Wild P
STONE & WEBSTER ENGINEERING CORP.
To:
References
REF-PT21-80-258-002 NUDOCS 8008270190
Download: ML19331D056 (3)
v • d • e


Text

E c.

STONE TJ YlEBSTER ENGINEERING CORPORATION 245 SuMutn SrREET. B O STON. MASSACHUSETTS ,;

AD DRE S S ALL CORRE S POND EN CE TO P.O. B OX 2.325. BOSTON. M A SS. 02107

w. U. T E y E M-44 0009 ,

oma sfeucTiose

, o y a E ne avions usvom

" " Emo = ta no

".'o',^ 1*:i msn. .oTo . o c.

Mr. Victor Stello, Director July 23, 1980 Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 -

{g J $~f, o c) 3

Dear Mr. Stello:

NOTIFICATION OF DEFECT, 10CFR21 SHOREHAM NUCLEAR POWER STATION - UNIT I LONG ISLAND LIGHTING COMPAST Stone & Webster Engineering Corporation (S&W), pursuant to the provisions of 10CFR21, hereby provides notification of a " defect" concerning the Shoreham Nuclear Power Station, Unit 1, owned by Long Island Lighting Company (LILCO) and for which S&W provided both engineering and construc-tion services.

In accordance with 'the requirements of Section 21.21(b)(3), the followini; information is submitted:

1. Name and address of the individual informing the Commission:

Mr. P. A. Wild, Director of Engineering ,

Stone & Vebster Engineering Corporation Post Office Box 2325 Doston, MA 02107

2. Identification '

the facility, or the basic component supplied for such facilia , which contains a defect:

j Shoreham Nuclear Power Station, Unit 1 General Electric Company (GE) 4 kV switchgear circuit breaker - Snap Rings

3. Identification of firm constructing facility or supplying basic component which contains a defect:

Basic Component supplied by GE ,

8008270/fd

y -

"b - - .

VS 2 July 23, l930 .

4 Nature o_f the defect and the safety harard which could be .

created by such defect: '.,

' ^ '

There exists a depa *"- #--- -' * -' # al require ents of a procure =ent docu=ent in that breakers could have .

failed to cperate as specified.

The defective circuit breakers are basic cc:pe:ents in GE metal-clad switchgear (4 kV) and the switchgear has been delivered to a purchaser.

As a result of loose breaker =ain output cracks, other links in the breaker =echanis eved cut of alig=:ent and i=pacted ' the prep pin snap ring. The effect of these i= pacts def =:ed the snap ring sufficiently to allcw it to fall off the prep pin. This could result in the failure of the-breaker to operate properly.

The breakers are required tader design basis events to assure the capability to shut down the reactor and

=aintain it in a safe shutd:w cceditice. Degradatics of such essential safety-related equipment rep' resents a

=ajor reductic: in the degree cf protection provided to the public health and safety and results in a substantial safety harard.

5. Date on dhich infor:stic of such defect was obtained:

July 23, 1930

6. In the case of a basic co:ponent which ccatsics a defect, the number and location of all such ce=penents in use at, supplied for, or being supplied for facilities subject to the regulatica:

Shoreham Nuclear Power Statics 4 kV sdithgear circuit breakers of which 29 are used in safe'ty-related applicacica.

7. The corrective action which has been, is being, or will be

, taken; name of individual or crganization respensible; and length of time taken to co=plete the action:

All 65 breakers at the Shoreham site were returned to GE for corrective work. Corrective actie censisted of cc:plete disasse=bly of.each breaker =echanis: for inspectics with replace =ent of parts as necessary.

GE factory engineering and Quality Assurance grcups have l been apprised of this preble: to prevent recurrence.

The ide=tified corrective actica has been c epleted.

a

=

~ 1 f-.,

VS 3 July 23, 1980

8. Advice related to the defect that has been given to purchasers or, liceitsees : ;p- .

No other actica apart frem that specified under the previous section.

Identification of this defect and the filing of this report are results of a review of 10CFR50.55(e) Reports and Licensee Event Report,s filed by S&W clients since January 6, 1978. This review, committed to.in our letter to NRC of September 6, 1979, resulted from the NRC special inspection of May 1-4, 1979. NRC has been previously advised of this problem by LILCO n:tification on November 17, 1978, in accordance with 10CFR50.55(e).

If you require any further infor=ation, please contact S. B. Jacobs at 617-973-5264.

Very truly yours, e

~ .y b .

P. A. Wild Director of Engineering PAS:mra

~

4 t

e

.m-

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