ML20091B454

Proposed Tech Specs Re Instrument Air Surveillance & Secondary Coolant Activity

ML20091B454
Person / Time
Site:	Fort Saint Vrain
Issue date:	05/10/1984
From:	PUBLIC SERVICE CO. OF COLORADO
To:
Shared Package
ML20091B424	List: ML20091B422 ML20091B440 ML20091B454
References
NUDOCS 8405300294
Download: ML20091B454 (5)

Text

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ATTACHMENT 1 PROPOSED CHANGES t

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8405300294 840510 PDR ADOCK 05000267 P. .  :... . PDR

', . . . Fort St. Vrain #1

. Technical Specifications Amendment No.

Page 5.3-8 Specification SR 5.3.6 - Instrument Air System Surveillance The pressure indicators and low pressure alarms on the instrument air receiver tanks and headers shall be functionally tested monthly and calibrated annually.

Basis for Specification SR 5.3.6 The instrument air system is a normally operating system.

Malfunctions in this system will be normally detected by failure of the instrument air compressors to maintain the instrument air receiver tanks at a pressure above the alarm setpoint. Functional tests of the pressure indicators and low pressure alarms on a monthly basis and calibration on an annual basis will assure the actuation of these alarms upon a malfunction of the instrument air system which may compromise the capability of operating critical valves.

Specification SR 5.3.7 - Secondary Coolant Activity Surveillance The secondary coolant system will be analyzed for 181I, tritium, and gross beta plus gamma concentration once per week during reactor operation.

l If the secondary coolant activity level reaches 10% of the l limit of LCO 4.3.8, the frequency of sampling and analysis shall be increased to a minimum of once each day until the

'. . . . Fort St. Vrain #1

- Technical Specifications Amendment No.

Page 5.3-9 l activity level decreases to less than 10% of the limit of l LCO 4.3.8, at which time weekly sampling may be resumed.

Basis for Specification SR 5.3.7 The specification surveillance interval is adequate to monitor the activity of the secondary coolant.

Specification SR 5.3.8 - Hydraulic Snubbers Surveillance The following surveillance requirements apply to all Class I piping system hydraulic snubbers:

a) Visual Inspections The first in-service visual inspection of snubbers shall be performed within six months from issuance of this Technical Specification (Amendment 39).

For the purpose of entering the schedule described in this section, it shall be assumed that the facility had been on a six-month inspection interval.'

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ATTACHMENT 2 SIGNIFICANT HAZARDS CONSIDERATIONS l

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SIGNIFICANT HAZARDS CONSIDERATIONS I. Evaluation SR 5.3.7 This proposed change would not only decrease the activity level at which increased monitoring would be initiated, but it would also maintain increased monitoring until the activity level decreased to less than that level.

This requirement would also provide for early detection and repair of primary to secondary boundary leakage paths and limit secondary coolant contamination.

Equilibrium value comoarisons and variations are considered inconclusive and therefore inconsequential for monitoring normal secondary coolant activity levels. Increased monitoring requirements whenever the activity levels reach or exceed 10% of the required LCO limits is considered more restrictive than the present monitoring requirements and in any event equally adequate to monitor the activity of the secondary coolant.

II. CONCLUSION Based on the above evaluation, it is concluded that operation of Fort St. Vrain in accordance with the proposed changes will not (1) involve a significant increase in the probability or consequences of an accident previously evaluated, (2) increase the possibility of a new or different kind of accident from any accident previously evaluated, or (3) involve a significant reduction in any margin of safety.

Therefore, these changes will not, increase the risk to the health and safety of the public nor do they involve any significant hazards considerations.

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