ML19329C709
| ML19329C709 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 09/04/1974 |
| From: | Stello V US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Deyoung R US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8002180202 | |
| Download: ML19329C709 (3) | |
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8' UNITED STATES '
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ATCMIC ENERGY COMMISSION WASHINGTON. D.C. 20545 SEP 4 1914 Docket No. 50-346 Richard C. DeYoung, Jr., Assistant Director for LWR's, Group 1, L DAVIS-BESSE NUCLEAR POWER STATION, DOCKET NO. 50-346 Plant Name: Davis-Besse Nuclear Power Station Licensing Stage: OL Docket No.: 50-346 Responsible Branch ant' Project Leader: LWR 2-3, I. Peltier Requested Completion Date: September 6, 1974 Applicant's Respcnse Date Necessary for Ccmpletion of Next Act. ion Planned on Project: December 6, 1974 Description af Response: iosition Statements Review Status: Awaiting Information Adequate responses to the enclosed Position Statements prepared by the Reactor Systems Branch are required before we can complete our review of the subject application. This request supersedes that dated December 21, 1973 and concerns compliance by the applicant with the Codes and Standards Rule, 50.55a of 10 CFR Part 50, System Quality Group Classifications and Seismic Classifications of fluid systems important to safety.
l J
Victor Stnllo, Jr.,
ssistant Director for Reactor Safety Directorate of Licensing
Enclosure:
Position Statements cc: w/o encl.
A. Giambusso, L W. S. Mcdonald, L cc: w/ encl.
S. H. Hanauer, DRTA F. Schroeder, L A. Schwencer, L I. Peltier, L T. Novak, L R. Kirkwood, L 8002180 M 2 g l
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DAVIS-8 ESSE NUCLEAR POWER STATION DOCKET NO. 50-346 Your Seismic Class II classification of those portions of the Compo-1.
nent Cooling Water Systems which service:
(1)
Reactor Coolant Pumps, (2) Letdown Cooler, and (3) Seal Return Cooler is not in agreement with current AEC practice and is unacceptable.
The Regulatory staff considers systems which support other systems Therefore, the important to safety to be also safety-related.
Regulatory staff position is that those portions of the Component Cooling Water System which service items (1), (2) and (3) should be classified Seismic Category 1.
That portion of the letdown line of the Makeup and Purification 2.
System from valves MU83, MU87 and MU 86 through the purification filter, purification demineralizers, makeup filters, seal return coolers, makeup tank to the suction side of the makeup pumps that is classified quality Group C is not in agreement with current practice and is unacceptable.
The Regulatory staff considers the letdown line of the Makeup and Purification System to be the normal flow path of reactor coolant through the system and important to safety. Therefore, the Regu-latory staff position is that the letdown line of the Makeup and
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Purification, System should be classified Quality Group B.
Verify that the entire letdown line of the Makeup and Purification 3.
System is classified Seismic Category 1.
- 4. ~ All major components of the Makeup and Purification System identified in Table 9-11 are classified as Seismic Class 1 except the Purification Review Demineralizer on page 9-66 which is classified Seismic Class II.
the classification of the Purification Demineralizer.
5.
Your response to Question 3.2.3 in Revision 3 to the FSAR is unacceptable since you have not identified where required the component code class.
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.m For example', in Table 9-11 the Spent Fuel Pool Cooling System Pumps are identified as designed, fabricated and tested to code "b" which according to Section 9.0 is ASME Section III,1971 Edition. This is insufficient, since there are three component code classes in the 1971 Edition of Section III, Classes 1, 2 and 3.
Review Table 9-1 and as appropriate include the component code classes.
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