ML19319A878

Summary of 760518 Site Visit to Discuss Operation of Interim Radwaste Mgt Facility & Proposed Permanent Facility

ML19319A878
Person / Time
Site:	Oconee
Issue date:	06/22/1976
From:	Jun Lee Office of Nuclear Reactor Regulation
To:	Jay Collins Office of Nuclear Reactor Regulation
References
NUDOCS 7912300061
Download: ML19319A878 (3)

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Docket Nos. 50-269/270/287 SI John T. Collins,' Chief. Effluent Treatment Systems Branch, DSQ S%W 111RU: Michael J. Bell, Leader, Systems Analysis Sectiong3I73irj,350 11t1P REPORT - OCONEE NUCLEAR STATION

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m On May it,1976, I visited Oconee Nuclear Station with C. Zech (ORPM),

L. Barrett (EER), and R. Clark (EEB) to obtain technical information on tho' operation of the Interim Radwaste Manager 4ent Facility and to discuss the licensee's proposed permanent radwaste facility. The major items of discussion were as follows:

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Liquid Radwaste Process Capability 7

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Eule Power Company has made design modifications to the Oconee a

liquid radweste system to segregate laundry waste from other mis-7 collaneous liquid radwastes. The reactor shim bleed is processed with the miscellaneous liquid waste and no attempt has been made to recycle any processed liquid waste or shim bleed for reuse. The Boron Recycle System evaporator (nominal design capacity of S gpa) has been contaminated with chemical impurities by using it for

,j' processing miscellaneous liquid radwaste. Station personnel stated that an attempt will'be made to-clean up the evaporator systoa and recycle concentrated boron and evaporator distillate for reuse.

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During 1975 Oconee reported a total liquid radwasto discharge of 7.8 million gallons from Unit Nos. 1, 2 and 3 (including shin' blesd, laundry wastes and approxir.ately 2 million gallons of Powdex resia backwash waste in' addition to the miscellaneous liquid rad-l waste). -Duke Power Co=pany agreed to provido us data showing the amount of liquid radwastes discharged from the Oconee Station during 1975 and 1976, including discharges from the laundry holdup tank, condensate monitor tanks, and condensate test tanks.

2.

Evaporators l'

Three radwaste evaporators (two 5 gpa and one 15 gpa) are available for service. At the time of our visit two of the evaporators (one 5 g;m and one 15 gpm) were processing liquid radwaste. The evaporator 2

with a nominal design capacity of 15 gpe, as stated in the Oconee Safety Analysis Report, is a standard Westinghouse unit with 304 S.S.

tubes and with an integral gas stripper package. 11owever, the' I,

effective process capacity of this evaporator is less than 10 gpa, due to batch operation of the evaporator feed. The two evaporators with a nominal design capacity of 5 gpu are the Aqua-chon spray-i film type with 304 S.S. tubes and operate at less than 3 gpa effective i

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process rate. n e three' evaporators provide a combined effective process espacity of 12'aps with as assumed availability factor of 750 Duke Power company agrood to provide us information on the 4

. expected availability of the liquid radeaste evaporators.

Considering a combined effective evaporator process capacity of 12 spa and 5.5 million gallons of liquid radwaste processed.in 1975 (equivalent average rate of 10.5 spm), the Oconee liquid radwaste system has a marginal capacity to process all liquid radwaste inputs from the combined operation of Unit hys.1,. 2 and 3.-

3.

Gaseous Radwaste Effluent Monitoring From the Waste Management Facility Building

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We radiological effluent monitoring system for building ventilation exhaust from the newly constructed waste management facility does not have the capability to sample particulate material and iodine-131

-An effluents. We explained the need for radiciodine and particulate effluent monitoring in the building ventilation exhaust and informed Duke Power Company that this capability is required by our standard radiological effluent T=ehnical Specifications in conformance with General Design Criterion 64.1 Duke Power Company is presently evaluating

-design modifications to include.the capability to sample particulate material and iodine-131 in effluents and will submit theumodifications rovssefor!our.trevi&w and approval.

4.

Disposal of Condensate Polisher Spent Powdex Resin Backwash Waste Oconee discharges condensate polisher Powdez resin backwash wastes from Unit Nos. I and 2 intc A common sump (Unit No. 3 has a separate sump) at a maximum waste input rate of.1,000 gpm. The sump is equipped with two sump pumps that pump the waste directly to a l

settling basin. The present system does not have the capability to monitor radioactivity levels in the solids or to handle these sludges in the solid waste systaa. Duke Power Company is presently evaluating design modifications to handle spent Powdex resin backwash waste in the event of primary to secondary leakage.

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Docket Files 50-269/270/287 NRR Reading File DSE Reading File ETSB Reading File J. Y. Lee v;.

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