ML19098B276

LER 1975-002-00 for Surry Units 1 and 2 Ventilation Vent Gaseous Release and Liquid Release

ML19098B276
Person / Time
Site:	Surry
Issue date:	06/30/1975
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	Moseley N NRC/IE, NRC/RGN-II
References
Serial No. 583 LER 1975-002-00
Download: ML19098B276 (4)

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e SPECIAL REPORT SR-Sl-75-02 VENTILATION VENT GASEOUS RELEASE AND LIQUID RELEASE DOCKET NOS. 50-280 50-281 LICENSE NOS. DPR-32 DPR-37 JUNE 11 , 197 5 SURRY POWER STATION VIRGINIA ELECTRIC AND POWER COMPANY

I. INTRODUCTION In accordance with Technical Specification 6.6.B.3 for Surry Power Station, this report describes the release of gaseous wastes in excess of 4 per cent of the Technical Specification limit established by Technical Specification 3.11.B.1.

II.

SUMMARY

OF OCCURRENCE During the months of April and May, several non-routine operations contributed significantly to the quantity of liquid waste generated by Unit Nos. 1 and 2. These non-routine operations included demineralizer resin transfer and drainage of numerous pipes and components for maintenance during Unit No. 2 refueling shutdown. The increased generation of liquid waste has required the continuous operation of liquid waste facilities at full capacity. This has resulted in an increase in Iodine-131 activity within the auxiliary building.

On May 2, 1975 the rate of liquid waste release from the station was increased to 10 per cent of the Technical Specification limit to reduce the quantity of stored liquid waste. A continuous controlled release was maintained at a level of 10 per cent of the Technical Specification limit until mid-June.

On May 14, 1975, routine sampling of the ventilation vent gaseous activity revealed an Iodine-131 activity of 6.5 per cent of the Technical Specification limit. Since that time, ventilation vent Iodine-131 activity has exceeded 4 per cent on a number of occasions. Based on existing liquid waste inventory and projected liquid waste generation, it is estimated that it may be necessary to continue operation of liquid waste facilities at

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full capacity for an extended period, possibly throughout the quarter.

The quarterly limit of 16 per cent of the Technical Specification limit averaged over the quarter as defined in °Technical Specification 3. 11. B. 2 will not be exceeded.

III. CONCLUSION The generation and accumulation of large quantities of liquid waste, has required the continuous operation of liquid waste facilities at full capacity. This has resulted in an increase in Iodine-131 activity within the auxiliary building. As a result, ventilation vent Iodine-131 activity has exceeded 4 per cent of the Technical Specification limit.