ML20198G038
| ML20198G038 | |
| Person / Time | |
|---|---|
| Site: | Washington Public Power Supply System |
| Issue date: | 09/10/1974 |
| From: | Stello V US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Deyoung R US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| CON-WNP-1000 NUDOCS 8605290199 | |
| Download: ML20198G038 (2) | |
Text
..
.I i
SEP 10 Docket Nos. STN 50-460 I
& 513 Richard C. DeYoung, Jr., Assistant Director for LWR's, Group 1, L WASHINGTON NUCLEAR PROJECTS N05.1 & 4 Plant Name: Washington Nuclear Projects Nos.1 & 4 Licensing Stage: CP Docket Nos.: STN 50-460 & 513 Responsible Branch and Project Leader: LWR 2-3, T. Cox Requested Completion Date: October 24, 1974 Applicant's Response Date Necessary for Completion of Next Action Planned on Project: December 5, 1974 Description of Response: Position 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 concerns compliance by,the applicant with the Codes and Standards Rule, Section 50.55a of 10 CFR Part 50, System Quality Group Classifications and Seismic Classifications of fluid systems important to safety.
Ngtnal Signed bg
(
Fletor Steno
,r Victor Stello, Jr., Assistant Director for Reactor Safety l
Directorate of Licensing
(
Enclosure:
Position Statements cc: w/o encl.
A. Giambusso, L
\\
U. FcJonald, L Dec I File r-RSB Reading File cc: w/ encl.
L: Reading File S. Hanauer, DRTA F <chroeder, L B605290199 74o910 PDR ADOCK 0500 0
A. Schwencer, L A
l T. Cox, L
//
(
l.
i:cyak, L
% p a'"==*R.
Ki rkwcod,-.L-._ L:RSB 23fl.-
L:hm.L L -
. _L :RS...
Radlinski, L RRadlinski/ww RKirkwood TM ovak VStel Varga, L 9L 4. 174 -.9L. e..176 9/. 9 -.. /7A 9/..){,.1-174 g-
. ~. -
Foran AEC.318 (Rev. 915) AEO4 0240 W v. e. novsanasswr ensuvine orricas sera.ese-see
(
e z
WASHINGTON NUCLEAR PROJECTS NOS.1 & 4 DOCKET NOS. STN 50-460 & 513 l.-
In Table 3.2-2,. list the design codes and classifications for the components of the lube oil, cooling water, starting air and combustion air subsystems of the onsite diesel generators.
The Regulatory staff position is that these subsystems should be Sa'fety Class 3, Seismic Category I, as indicated in the piping and instrumentation diagrams.
2.
In Figure 3.2-6, the safety classification boundaries for the nitrogen supply lines to the component ::ooling water and nuclear service water surge tanks occur at normally open manual valves.
This is not considered acceptable since failure of the non-Seismic Category I portion of the nitrogen system could result in a loss of cooling water in the CCW or NSW system and prevent these systems from performing their safety functions.
The Regulatory staff position is that safety classification change boundaries should occur at normally closed isolation valves or at valves capable of automatic closure unless it can be shown by analysis that the safety function of a system will not be impaired by an open connection with a system of a lesser safety classification.
Since acceptable means of isolation are not provided at safety classification change boundaries in several of the applicant's systems, the applicant should review every system and revise l
the P&ID's accordingly, 3.
In Figure 3.2-9, the boron analyzer is incorrectly classified as NNS. The Regulatory staff position is that this component should be classified Safety Class 2, Seismic Category I.
i 4.
In. Figure 3.2-44, the safety function of'the containment normal sump is not clear. Although it is shown as Safety Class NNS, the sump collects the continuous bleed from the containment spray system and provides suction to the decay heat system (according to Figure 3.2-44).
Describe the function of the con-tainment normal sump as it relates to the operation of the con-tainment spray and the decay heat systems.
The Regulatory staff position is that if the containment normal sump is required for containment or decay heat removal, it should be classified Safety Class 2, Seismic Category I.
.