ML17208A803

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Advises NRC That NUREG-0578 Requirement to Measure Chlorides & Dissolved Gases in RCS Following Accident Is Excessive & Involves Unnecessary Personnel Exposure to Radiation. Requests That NRC Reconsider Position
ML17208A803
Person / Time
Site: Saint Lucie, Turkey Point  NextEra Energy icon.png
Issue date: 06/27/1980
From: Robert E. Uhrig
FLORIDA POWER & LIGHT CO.
To: Eisenhut D
Office of Nuclear Reactor Regulation
References
RTR-NUREG-0578 L-80-203, NUDOCS 8007110199
Download: ML17208A803 (2)


Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8007110199 DOC,DATE: 80/Ob/27 vJOTARI7EQ: NO DOCKET FAC IL:50-250 Turkey Point PlantI Unit 3i Florida Power and Light C 05000250 50"2 '1 Turkey Point Planti Unit 4i Florida Power and Light C 05000251 Lucie Planti Unit li Florida power 8 Light Co. 05000335 t .r~&iE AUTHQR AFFILIATIoN UHrel pR ~ ED F 1 or i da Power rr Light Co ~

REC I P, >~Ai<E REC IP IENl'FF ILIAT ION EISENHUTID.G. Division of Licensing

SUBJECT:

Advises HRC that NUREG-0578 reauirement to measure chlorides 8 dissolved gasses in RCS following accident is excessive 8, involves unnecessary personnel exposure to radiation.

Reauests that NRC reconsider position.

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~<~RIDA vo'h'GR a !.IGHT C~4lrbhY Office of Nuclear Reactor Regulation Attn: Mr. Darrell G. Eisenhut, Director June 27, 1980 Division of Licensing L-80-203 U. S. Nuclear Regulatory Commission

>lashington, D.C. 20555

Dear Mr. Eisenhut:

Re: Turkey. Point and St. Lucie Plants Docket Nos. 50-250, 50-251, 50-335 Short Term Lessons Learned NUREG-0578 In reviewing Item 2.1.8.a of NUREG-0578, we have been unable to determine a need to sample the Reactor Coolant System (RCS) for chlorides following a LOCA. Our basis is that, beyond general area contamination, there is no significant source of chlorides available within the containment. Even though a very low level of chlorides may enter the system during containment sump recirculation following a LOCA, the concern for stress corrosion cracking is relieved by controlling (raising) the pH. In any event tne presence of chlorides in the coolant following postulated accidents would not affect decisions with respect to controlling the course of that accident.

NUREG-0578 requires that certain chemical analyses be performed to monitor reactor conditions. Except for noble gas activi ty, there was no mention of analyzing for dissolved gasses. Subsequently, an October 30, 1979 letter from Mr. Harold Denton to all operating nuclear power plants added dissolved gasses to the list of requirements, with hydrogen and oxygen mentioned as examples. Our review has concluded that a measurement of dissolved coolant gasses will probably not depict the true conditions in the reactor because much of the gas generated would collect in gas pockets at system high points.

In particular, we cannot support the measurement for oxygen, since we cannot conceive of an explosive mixture being formed within the RCS.

Based on the above discussion, we consider the requirements to measure chlorides

'and dissolved gasses in the RCS following an accident to be excessive and to involve unnecessary exposure of personnel to radiation. Therefore, we request

( that your staff review its position regarding sampling for chlorides and dissolved gasses, If your staff does not concur wi th us, we would appreciate further clarification justifying the additional radiation exposure which would likely be received by personnel performing the subject analyses.

Very truly yours, Vice President Advanced Systems 8 Technology goo(

5 REU/MAS/AJG/pa cc: J. P. O'Reilly, Region II Harold F. Reis, Esquire 80'07110 l t f