ML20084L057

Ao:On 740524,torus to Core Spray Pump Room Watertight Door Discovered Open W/Water Hose in Doorway.Hose Removed,Door Closed & Requirements for Maintaining Closed Watertight Door Emphasized

ML20084L057
Person / Time
Site:	Quad Cities
Issue date:	05/28/1974
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	Oleary J US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084L051	List: ML20084L050 ML20084L057 ML20084L063
References
NJK-74-98, NUDOCS 8305200160
Download: ML20084L057 (2)

Text

,

As Commo Ith Edison (L/ ;

i

tCA 1 ^

Ourd-Citie. an: rating Strtion Past Office Box 216 . k j~/ Cordova, Illinois 61242 k

- - - < Telephone 309/654-2241 ,gg d A h NJK-74-98 /N $' N ae, b g% @ kip e h & yW< . wV i' h ;-) 0 1 May 28,1974 a' y './ *: . M l QA j% ,'*i(,":y,ylh (;.].!

)

s,  % - )

Mr. John F. O ' Leary, Di rector  ;

~

Directorate of Licensing l Regulation j U. S. Atomic Energy Commission +

Washington, D.C. 20545 I i

n

Reference:

Quad-Cities Nuclear Power Station Unit 2, Docket No. 50-265, DPR-30, i Appendix A , Sections 1.0.A.2, 3.7.C.2, and 6.6.3.1.a )

e

Dear Mr. O ' Leary:

The purpose of this letter is to inform you of the details concerning the Unit i 2B torus to core spray pump room watertight door which was found open, thus i exceeding Technical Specification 3 7.C.2. This abnormal occurrence was previ-ously reported to you by telegram, and to Region til, Directorate of Regulatory "

Operations personnel by telephone and telegram on May 25, 1974.

PROBLEM AND INVESTIGATION At 1400 on May 24,1974, with Unit 2 having all rods inserted and reactor water

- temperature > 212 F, the Unit 2B torus to core spray pump room watertight door _

was discovered open with a water hose in the doorway. This rendered the 2B core spray loop inoperable in accordance with Technical Specification 3.7.C.2. The hose was removed and the door was closed, thus making the 2B core spray loop operable. l t

EVALVATION AND CORRECTIVE ACTION  !

Safety implicatiens a

The 2B core spray loop was only technically inoperable. At all times it was actually able to perform its intended function. This, in conjunction with the redundancy of design, causes the safety implications of this open door to be ,

minimal. ,

Determination of Cause and Corrective Action A water hose in the 2B core spray room to torus watertight doorway caused the door to be open. The hose was removed and the door was closed. A meeting was held with supervisors of contractor personnel working in the area and the re-quirements for maintaining closed watertight doors were emphasized. Provisions <

were made to use an alternate route for required hoses.

0305200160 740525 PDR ADOCK 05000265 l'

'V s

( dOOd I'

S PDR V j c l 'p &

3 COPY SENT REGION P -

n  ;

Mr. Jchn F. O 'Lecry Mcy 28, 197h  :{

O O  :

1 Evaluation of Cumulative Experience .

i This occurrence represents the first instance of Technical Specification 3.7.C.2 i being exceeded at Quad-Cities Station. Thus, no cumulative experience data is available. ,l Very truly yours, l j

J COMMONWEALTH EDISON COMPANY  !

quad-CITIES NUCLEAR POWER STATION g[j;/g//p ,A 05.a v A j N. J. Kalivianakis Station Superintendent NJK:CWS/j eh

• cc: Region li t , Directorate of Regulatory Operations J . S. Abel u

l l

l