ML20137N628

Provides Preliminary Evaluation Test Results of High Temp, 300 F Test of CRD Mechanism Assembly,Per .Test Completed on 860122.Assembly Performed Required Operations of Scram & Drive Motor W/O Incident

ML20137N628
Person / Time
Site:	Fort Saint Vrain
Issue date:	01/30/1986
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Berkow H Office of Nuclear Reactor Regulation
References
P-86071, TAC-61601, NUDOCS 8602040173
Download: ML20137N628 (2)

Text

. r-hf Public Service ~

2420 W. 26th Avenue, Suite 1000, Denver, Colorado 80211 s..m.

Company of Colorado January 30, 1986 Fort St. Vrain Unit No. 1 P-86071 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attn: Mr. H.N. Berkow, Project Director Standardization and Special Projects Directorate Docket No. 50-267

SUBJECT:

CRDM Assembly

REFERENCES:

1) PSC Letter Lee to Johnson dated January 30, 1985 (P-85032)

2) PSC Letter Warembourg to Butcher dated November 5, 1985 (P-85380)

3) PSC Letter Brey to Berkow dated December 12, 1985 (P-85463)

4) PSC Letter Warembourg to Berkow dated December 19, 1985 (P-85478)

Dear Mr. Berkow:

Reference letter 2) established and letter 3) reiterated the PSC

! conmitment to complete the high temperature, 300 degree Fah rer.hei t ,

test of a CRDM assembly by December 30, 1985, including a preliminary l

NO kDOC [ vol P

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- 1' evaluation of the test results. Reference letter 4) iterated the problems we were experiencing with the test equipment and advised of a delay in the completion of the test and our advising the NRC of the preliminary evaluation until January 30, 1986.

This letter is fulfilling the January 30, 1986 commitment. The high temperature, 300 degrees Fahrenheit, test as described in attachment I to reference letter 1) was completed on January 22, 1986. The CRDM assembly performed the required operations of scram, operation of the CRD drive motor and the orifice valve drive motor without incident.

The indicating position switches and potentiometers were monitored and functioned through the test. No failure of any CRDM assembly cumponent was experienced.

A final report of the CRDM assembly high temperature test will be c submitted on or before March 31, 1986.

If you have any questions concerning this subject, please contact Mr. M. H. Holmes at (303) 480-6960.

Very truly yours, JA /Y. }Yg u /wy D.W. Warembourg, Manager Nuclear Engineering Division DW/JRR:pa y __ - _ .