ML20084A423

Advises That AO 3-2-12 Reported on 730914 Re Inner Door Partially Opened for Short Period Has Been Reviewed & No Significant Safety Implications Found

ML20084A423
Person / Time
Site:	Indian Point
Issue date:	09/17/1973
From:	Cobean W CONSOLIDATED EDISON CO. OF NEW YORK, INC.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20084A392	List: ML20084A390 ML20084A423
References
AO-3-2-12, NUDOCS 8304050184
Download: ML20084A423 (1)

Text

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September 17, 1973 .

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N he: Indian Point. thiit No. 2 Docket No. 50-2/,7 Q7

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Mr. Jamt n l'. O' Ytci)1y , Director -

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On f.eptt:2er 14, 1973 ue notified P,r. F6cano of your of fico by -

te.)cphone that 6uring acintenance oi the c'Jondre nechaniran of the 80' c.lc.vt. tion outer door of the vapor . container on Septc.nber ~

.D, th. imser door unn partially opened f or a'short per505. 'The reat: tor was in a co.10 shutdown condition (ronetor ' coolant at. 450 pr.3 9 and }.90P with a uhntdown unrgin E/,kbX) .- The cuyrcnt definit- '

ion of cold shut 60un mpires a co'o3 nnt. tcm.pe'rature d140P. lle.:r ver ,

• nu the bracin of thin 'tenpernture 3imit in f.d:hm re.lenue potentin), .

c. cooler.t te::.uarature of 190P choul6 he acceptable. He are pinn' n3ng to inheit es reguent to landify the definition.to a marc realis-tic coolnnt temperaturc .i.ir.it' of -200F, The. F.tation Nac) oar S dety Cweteittoc roviound this .occurre.nce on Septad. ice 1/. nr.i? found no cit.1nif 5 cant nef ot:e 3r.plice tions invo.1ved.

'Jhe Vice Chairr.nn of t.h n Nuc) car Pacilit..ica Unf ety Cocait. ten was in-f on.ud of t.htne finding,n on the some day. ,

Yours trulyr 6.ba,%.s k, .JW '. 4

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cc: ilohn, P. O' J.enry

• Warren R. Cobean, Jr.

8304050184 730927 -

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F6r signatu re. X Fer Informatio%

INtilALS RtMARKS fO (Name and unit)  ;

A0 Chief, FS&EB, IlQ / CONSOLIDATED EDISON COMPANY r RO:llQ (5)

Central Mail & Files urs ABNORMAL OCCURRENCE #3-2-12 Regulatory Standards ( 3)

Regional Directors, R0 (4) INDIAN POINT II TO (Name and unit) IMITIALS REMARKS Directorate of The attached abnormal occurrence letter Licensing (13)

GC un is forwarded for information. Distribution will be made by this office to the PDR, TO (Name and unit) INtilALS REMARKS Local PDR, NSIC, DTIE, and State representatives.  ;

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FROM (Name and unit) P Ad W _r D /m '

E. J. Brunner f" / f' / ,

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t i 76T TJ21/73 6 l WSE OTHER SdDE FOR ADDITIONAL REMARKS cro ,1,110 443.ese

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'.t;cchac (112) 4tE 3r119 April 16, 1975 RE: Indian Point Unit No. 2 Docket No. 50-247 Mr. Edson G. Case, Acting Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Case:

In accordance with Section 6.12.2 (b) of the Technical Specifications of Facility Operating License DPR-26, we wish to inform you of an Unusual F, vent.

Following a test of the Indian Point Unit no. 2 Control Room Ventilation System, in August of last year, it was discovered that the outside air dampers in this system were wired so that they would open automatically on a high radiation signal. This was not in accordance with the Final Safety Analysis Report which state.9 that these dampers should close automatically on a high ra'diation 1cvels to prevent introduction of air containing radioactivity into the control room following a postulated accident.

At that time, action was taken to determine whether a design error or construction wiring error existed and what corrective measures would be renui. red. As an interim measure, however, the control-room outside air dampers were immediately disconnected from their electrical controls and locked in the closed position. This action assured that operation in the recirculation modo, which'is the system nafety function, is always available. Since t. ben , ' i t has been determined that the e]cetrical controls of the system described in the Final Safety Analysis Report are correct and the wiring as it had existed constituted a reportable Unusual Event. The controls to these air dampers will be rowired to reflect the correct design as stated in the PSAR.

o Very. truly

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William J. Cahill, Jr.

I Vice President

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