ML20084S039

Telecopy Ao:On 750830,while Performing Monthly RCIC Operability Surveillance Test RCIC Would Not Reach Normal Conditions.Possibly Caused by Overspeed Mechanism.Required Testing of HPCI Sys Initiated

ML20084S039
Person / Time
Site:	Quad Cities
Issue date:	08/31/1975
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084S026	List: 05000265/LER-1975-034-01, /01T-L:on 750830,reactor Core Isolation Cooling Sys Kept Tripping at 3,500 RPM & Prevented from Pumping 400 Gpm as Required by Tech Specs.Caused by Wearing of Nut in Mechanical Overspeed Trip Mechanism ML20084S039
References
NJK-75-437, NUDOCS 8306160121
Download: ML20084S039 (1)

Text

4 I

~

ConunonweeHh disor.

Ond-Cities Generating Station, l

/

Put Office Box 21C.

l 4-f Cordcrira,I!!!nois 61242

~.. - -. '. "

Telephona339/654 2241.

C-75-437 LOOCpy Region.III, Attention:

Mr. C. Feierabend

)

gust 31, 1975 K:ppigr', Regional Director rico cf Inspection and Enforcement.

pion: III S. Nuclear Regulatory Commission.

P Ricacvelt Road.

en.Ellyn, 1111nois 60137 Ecr nsa:

Quad-Cities Nuclear Power Station, Unit 2 Docket No. 50-265, DPR-30' Appendix A, Sections 1.0. A. 4, 3 5.E.1, 6.6.B la.

te Mr. Keppler:

g.

r purpose of this letter'is-to provide you with, notification. or an-

,f 1:rmal Occurrence as required by Technical Specification. 6.6.B.1,a

'l hin. 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the occurrence.

I August 30, 1975, whilo performing the monthly RCIC operability j

millance test, it was discovered that.the RCIC would not. reach.

3 t rat 6d conditions, but would trip.at 3500 RPM.

Approximately-l 30 RPM was needed.

A failure in the overspeed mechanism is sus-i

tCd.

The HCIC system was declared inoperable and the required

) "

sting cf the HPCI system was initiated.

l L3 occtirrtence was discussed by' telephone with. Mr. Allen of your

[

Fico on August 30, 1975.

Further information will be provided-by

'b 10rmal Occurrence Report AO 5_0-265/73-34_which. will be submitted g

8 Lhin.10 days.of the date ofthis occurrence, pp Fy truly ycurs, j

Ol0NWEALTN EDISON COMPANY f gl LD-CITIES NUCLEAR POWER STATION.:

f Y

l if J. Kalivianakis ttien Superintendent

}

C/RAR/caa f

Office of Nuclear' Reactor Regulation.

G. A..Abrell i

i e

I 8306160121 750909 b

PDR ADOCK 05000265 S

PDR

i a

e