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I July 3,1974 t
I Docket No.,50-220 Dr. William R. Stratton Chairmca, Advisory Committee j
on Rasetor Safeguards U. S. Atomic Energy Comadesion Washington, D. C.
20545
Dear Dr. Stratton:
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Sixteen copies of the Safety Evaluation Report (SLT,) prepared by the
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l Directorate of Liecnsing in the matter of Miagara Mohauk Power Corpora--
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tion's application for a full-tem operating license for the Nine Mile Point Noelear Station Unit 1 are enclosed for review by the Cossaittee.
t h re are no outstanding items remaining to be resolved before issuance 1
of the full-term operating license. With the exception of the items discussed below, we consider our review to be complete.
1.
Vibration Manitoring (See Section 3.1 of SER) j In response to an ACRS en===ne, Niagara Mohawk eem=4tted to study j
possible means of monitoring for vibration in the reactor primary coolant system by use of externally mounted sensors. N results of this program to date is that the system is not capabis of 4
j detecting low amplitude vibration of reactor vessel intarnals.
N lica= = indicated that this program is being contimmed med will include development of a someer partieslarly suited to impoet detection. he, this item involves only further documentation app *opriate with the field testing of a pretetype impact moeitering system and the eventual instattation of at least a rudimentary impact system at IMP-1.
2.
Main Steam Lit.a Isolation Yalve Reliability (See Sectina 6.4.c of SER) a h licensee committed, in response to R0 inspection, to further action on the problem of main +=i=4== leak tightness of these valves.
As indicated in the SER, we expect Niagara Mohawk to contimme to i
i meet the Technical Specifications applicable to the leak tightness f
of these valves.
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- Id 8904240356 890413 PDR-FOIA WETTERH89-101 PDR
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J Dr. Williain R. Stratton July 3,1974 i
In addition, review and evaluation will be continued on the Niagara Mohawk response to the Seoerie matten of ATVS and ECCS. Also indicated in the SIR is the complete revision of the Technical Specifications.
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Sincerely, Original signc'dliyT Earlit Go11er Karl R. Go11er, Assistant Director for Operating Reactore Directorate of Licensing i
Enclosures Safety Evaluation Report (16)
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D u, s. GOVE WN M t NT PRINT W G OF F & M t W 928-189