ML19308D076
| ML19308D076 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 02/09/1977 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| Shared Package | |
| ML19308D077 | List: |
| References | |
| CS-77-22, NUDOCS 8002270578 | |
| Download: ML19308D076 (1) | |
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,[ ' j Florida 9 rebruary 1977 Pow 3-o->=-1 7'4,.,.,.
ca.....e...r CS-77-22 Mr. Norman C. Moseley, Director Docket No. 50-202 Office of Inspection and Enforce =ent License SDPR-72 U. S. Nuclear Regulatory Commission Licensee Event Report 77-8 230 Peachtree St., N.W., Suita 818 Atlanta, Georgia 30303
Dear Mr. Moseley:
This report is submitted in accordance with Technical Specification 6.9.1 and Regulatory Guida 1.16, Revision 4, Section 2.a. (4) as a written Fourteen (14) Day-Report. Your office was notified cn 3 February 1977 of this event.
While in Mode 3 (Hot SP:mdhy) during startup, routine chemistry surveillance disclosed a Boron dilution of approximately 50 ppm.
p This constituted a 0.57% reactivity insertion.
The cause of this event was inadvertent restoration of an unborated makeup and purification dominera11nar follwing the loss of a 4160V unit bus. The domineralizar was immediately by-passed.
The shutdown margin remained greater than 4% a K/K and all Safe p Rod Groups were withdrawn and cocked. Therefore,, no adverse conse-quences resulted.
Ver/ truly yours, FLORIDA POWER CORPORATION
'i.
U.tA5 W. P. Stewart Director, Power Production DWP/ib Enclos'ure h
clea-Plant Manager Os 80022706 97 J General Of tice 3:oi nwy eunn sirem soum. P O. Box 14042. St. Peterscurg. Fiorida 33733 813-866-5151