ML20214K549

Safety Evaluation Supporting Amends 93 & 88 to Licenses DPR-19 & DPR-25,respectively

ML20214K549
Person / Time
Site:	Dresden
Issue date:	08/13/1986
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML20214K519	List: ML20214K516 ML20214K529 ML20214K549
References
NUDOCS 8608210198
Download: ML20214K549 (2)

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NUCLEAR REGULATORY COMMISSION F,.

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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 93 TO PROVISIONAL OPERATING LICENSE NO. DPR-19 AND AMENDPENT NO. 88 TO FACILITY OPERATING LICENSE NO. DPP-25 COMMONWEALTH EDISON COMPANY DRESDEN NUCLEAR POWER STATION, UNIT NOS. 2 AND 3 DnCKET NOS. 50-237/2a9 l

1.0 INTRODilCTION

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By letter dated December 4,1984, Comonwealth Edison Company requested that proposed additions to the Dresden, Unit Nos. 2 and 3, Technical Specifications (TS) relatino to a Mobile Volume Reduction System (PVRS) be incorporated into Appendix A to Provisional Operating License No. DPP-19 for Dresden, Unit No. 2, and Facility Operating License No. DPR-25 for Dresden, Unit No. 3.

These proposed additions consist of a total'of two l

iodine and particulate samplers in the MVRS process and ventilation exhaust stacks (one sampler channel in each stack) mounted on top of the MVRS trailers. Operational descriptions of these additional iodine and particulate samplers are to be incorporated into TS Table 3.2.5, " Radioactive Gaseous Effluent Monitoring Instrumentation," Table 4.2.3, " Radioactive Gaseous Effluent Monitoring Instrumentation Surveillance Requirements," and Table 4.8.1, " Radioactive Gaseous Waste Samoling and Analysis Program." The use of the MVRS on a plant-specific basis under 10 CFR 20.305 was approved for the Dresden Station in a letter dated August 13, 1986, and will be limited to processing combustible low-level dry radioactive wastes and radioactively contaminated oil generated at the Dresden Station. Unit Mos. 2 and 3.

2.0 EVAUIATION The radioactive particulate and iodine samplino system consists of a sample probe, a sample cartridae (particillate filter and charcoal adsorber), and air dryer (for process exhaust only), a sampler air pump, and an air flow measuring device (rotameter). The system will operate continuously while the MVP.S is in operation. The failure of sampler operation, including power loss or low sampler air flow (plugging of the sampler of sampler air pump trip), will sound an alarm in the MVRS Control Panel and will require imediate manual suspension of the MVRS operation. The samplers are required to be checked daily durino the operation of MVRS. The daily instrument check includes, but is not limited to, the verification of the sampler operability including the sampler air pump, sample cartridge, and rotameter. The proper functioning of the sampler system is required prior to operation of the MVRS and subseouent MVRS startups. Sampler filter media will be removed once per week for analysis within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. The charcoal filter will be analyzed for I-131 and I-133, 8608210199 860813 DR ADOCK 05000237 PDR

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' ' and the particulate filter will be analyzed for principal gamma emitters including I-131. An additional reouirement of the MVRS process and ventilation exhaust samplers includes removing the filter whenever the MVRS is shut down a minimum of 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. Sample analysis must again be completed within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. Lower detection limits for analyzing these isotopes are specified in Table 4.8.1.

The maximum desion air flow rates in the certified vendor's fan performance curves will be used for the purpose of calculatino the amounts of radio-active particulates and iodines released through the process and ventilation exhausts into the environment.

Based on the foregoina the staff concludes that the proposed amendments meet NUREG-0473, " Radiological Technical Specifications for BWR's," Revision 2, and do not remnve or relax any existing requirements in the Dresden Station, Unit Nos. 2 and 3, Radiological Effluent Technical Specifications. Therefore, the staff finds the proposed amendments acceptable.

3.0 ENVIRONMENTAL CONSIDERATION

These amendments involve changes to a requirement with respect to the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and a changes to the surveillarce reouirements. The staff has determined that the amendments involve no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite and that there is no significant increase in individual or cumulative occupational radiation exposure. The Commission has previously issued a proposed findino that these amendments involve no significant hazards consideration and there has been no public comment on such finding. Accordingly, these amendments meet the elicibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9). Pursuant to 10 CFR 51.22(b) no environmental impact statement nor environmental assessment need be prepared in connection with the issuance of these amandments.

4.0 CONCIUSION The staff has concluded, based on the considerations discussed above, that:

(1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (2) such activities will be conducted in compliance with the Commission's reoulations and the issuance of these amendments will not be inimical to the common defense and security nor to the health and safety of the public.

Principal Contributor:

J. Lee Dated: August 13, 1986 mWF 1