ML20023B820

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Forwards Resolution of Open Items Re NUREG-0737,Item II.B.3, Post-Accident Sampling Sys, Per 830215 Evaluation & 830314 Telcon.No Significant Radiation Effects Anticipated
ML20023B820
Person / Time
Site: Rancho Seco
Issue date: 05/02/1983
From: Latham W
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To: Stolz J
Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.B.3, TASK-TM TAC-44473, TAC-60632, NUDOCS 8305060415
Download: ML20023B820 (2)


Text

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O esuun SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, Box 15830, Sacramento, California 95813; (916) 452-3211 May 2, 1983 DIRECTOR OF NUCLEAR REACTOR REGULATION ATTENTION JOHN F STOLZ CHIEF OPERATING REACTORS BRANCH 4 US NUCLEAR REGULATORY COMMISSION WASHINGTON DC 20555 DOCKET 50-312 RANCHO SEC0 NUCLEAR GENERATING STATION UNIT N0 1 NUREG 0737 ITEM II.B.3, POST ACCIDENT SAMPLING SYSTEM Your letter dated February 15, 1983, provided your evaluation of the Rancho Seco Post Accident Sampling System (PASS).

Your evaluation states that the PASS meets seven of the eleven criteria outlined in Item II.B.3 of NUREG 0737.

In a telephone conversation on March 14, 1983 with Sydney Miner and Jim Wing of your staff, the open items for the four remaining criteria were discussed.

Attached is the resolution of these items based on this conversation.

l$ < j haf W. K. Latham Acting General Manager Attachment k00 8305060415 830502 N

PDR ADOCK 05000 P

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ATTACHMENT Criterion 1 j

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Response: The District is designing an alternate power source that can be 7

energized during a loss of offsite power.

This modification will

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permit meeting the three hour time limit.

Since this is an

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  • c additional requirement to NUREG 0737, the District cannot commit to having this capability prior to startup from the current outage.

This modification should be completed in the early part of next year.

Criterion 2 Response: The District has contracted to have core damage estimates procedures

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developed. This procedure niil provide a means of estimating core damage based on such post-accident data as: RCS isotopic analysis, RCS temperature'end pressure, containment pressure, and radiation.

,'y This orocedure will be ready for use by the end of the current

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outage.

s.x Criterion 3 Response: All valvas in areas not access'ible post-accident are pneumatic cperated diaphragm vaives. These valves were not purchased to any qualification requirements since the system is not class 1.

However, from our evaluation of post-accident radiation dose rates and integrated doses, we are confident that the valves will operate for the required duration.

Criterion 10 s

Response: As stated in our previous submit.tal on PASS, the system and procedure is designed to achieve the desired measurement ranges, sensitivity, r

and accuracy.

These it6rc will'be verified during the startup and system testing.

Should any problem be identified with respect to the inability to meet the measurement requirements, modifications will be made.

With respect to measurement instrument capabilities in radiation environment, i.e., PH, conductivity, ion chromatography (boron and chloride), only probes and columns are in the radiation environment.

The electronic; are remote at the control panel.

From documented radiation effects and discussions with the manufacturers, no significant radiation effects are anticipated.

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