ML20028F150
| ML20028F150 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 01/20/1983 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20028F143 | List: |
| References | |
| NUDOCS 8301310188 | |
| Download: ML20028F150 (2) | |
Text
.
UNITED STATES 3..
NUCLEAR REGULATORY COMMISSION REGloN IV S
8 611 RYAN PLAZA DRIVE, sulTE 1000 ARLINGTON, TEXAS 76011 SAFETY EVALUATION BY THE NUCLEAR REGULATORY COMMISSION - REGION IV RELATED TO AMENDMENT NO. 31 TO FACILITY OPERATING LICENSE DPR-34 PUBLIC SERVICE COMPANY OF COLORADO FORT ST. VRAIN NUCLEAR GENERATING STATION DOCKET 50-267 Introduction By telecopy dated January 3, 1983, the Public Service Company of Colorado (PSC) requested an emergency technical specification (TS) that would add the following footnote to Specification LCO 4.4.1:
The last sentence on page 4.4-1 of LCO 4.4.1 is replaced by the following paragraph during the period of January 3, 1983, through January 13, 1983:
"For Table 4.4-1, the reactor shall be shut down within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, except that to facilitate maintenance on the Plant Protective System (PPS) moisture monitors, the moisture monitor input trip fur. tions to the Plant Protective System which cause scram, loop shutdown, circulator trip, and steam water dump may be disabled.
During the time that the Plant Protec-tive moisture monitor trips are disabled, an observer in direct communica-tion with the reactor operator shall be positioned in the control room in the location of control boards I-03 and I-05.
The observer shall continuously monitor the primary coolant moisture levels indicated by the Analytical System moisture monitors (MM-9306 and MM-9507) and the Primary Coolant Pressure Indicators (PI-1108, PI-1109 and PI-1110), and shall alert the reactor operator to any indicated moisture or pressure change."
Background and Evaluation The reason for the requested change is to permit maintenance on the PPS moisture monitors following the just-concluded plant outage.
The licensee proposed change is similar to LCO 4.9.2 which was approved on June 18, 1976, in Amendment No. 13.
8301310188 B30120 PDR ADOCK 05000267 p
. During the time that the PPS moisture monitors are disabled for maintenance, a dedicated individual in direct communication with the control room operator will monitor the analytical moisture monitors and the reactor pressure.
If a sudden or inadvertent moisture ingress occurs, the reactor operator will be informed and will initiate corrective action.
In addition, automatic alarms are initiated at levels lower than the PPS setpoints to alert the operator to take corrective action.
These compensating measures will provide acceptable levels of protection during the short period of time the moisture monitors are disabled.
J0ur review of the PSC technical specification request has resulted in our finding that the proposed change will not impose a significant adverse impact on the health and safety of the public.
Thus, we find the licensee's proposed technical specification acceptable.
Environmental Consideration We have determined that the amendment does not authorize a change in effluent types or total amounts nor an increase in power level and will not result in any significant environmental impact.
Having made this determination, we have further concluded that the amendment involves an action which is insignificant from the standpoint of environmental impact and, pursuant to 10 CFR S51.5(d)(4),
that an environmental impact statement, negative declaration, or environmental impact appraisal need not be prepared in connection with the issuance of this amendment.
Conclusion We have concluded, based on the considerations discussed above, that:
(1) because the amendment does not involve a significant increase in the probability or consequences of an accident previously evaluated, does not create the possibility of an accident of a type different from any evaluated previously, and does not involve a significant reduction in a margin of safety, the amendment does not involve a significant hazards consideration, (2) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (3) such activities will be conducted in compliance with the Commissions's regulations and the issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
Dated: January 20, 1983 The following NRC personnel have contributt.d to this Safety Evaluation:
Philip C. Wagner Thomas F. Westerman Glen L. Madsen