ML20040F644
| ML20040F644 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Limerick |
| Issue date: | 07/16/1970 |
| From: | Case E US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20040F238 | List: |
| References | |
| FOIA-81-385 NUDOCS 8202100009 | |
| Download: ML20040F644 (4) | |
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P. /.. Ibnis, Lirecror Division of F.enctor Licensing l
LI?' TICKeGE."EFATI!!G STATIC.; - D3C.CT I:CS. 50-352/353 Z
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/de ;ucte respcases to the enclosed list of questicas, papar2d by the DFS I'echcnical Engineering Bronc 5, will be requimd in ceter to crr.? cte our revicu of ne cubj.ect applicaticn. Tnese
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cuestions ccnecm the clacsificction of F.lR Systcrc by quclity
- px;3 fcr pressum cnntaining ccr.?cnents that cra within the Runcier Ccolaat bescure Bo
- ndcrf cad Acsocicted Auxilicrv Syste :s c3 ccwred in Appmiix A of the PSAR.
.l Onr.inal signed bI
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Edsm. G. Case, Dim _ etor Division of Reactor Standands i
Enclosure:
List of Questions cc w/ encl:
R. DeYoung, DRL R. Boyd, DRL D. Skovholt, DRL R. R. l'accarf, D?S W. Haass, DRL R. Kirkwood, DRS s
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O oy ll!ERICK GDEPATI!'G STATIO:1
[, I 1XJC:ET h0. 60-362/h3 SYSTD4 QUAllIY GROUP CLASSIFICATION l
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Tne classification of EWR Systems by quality groups for water and g
stesn-contairdrg pressure vessels, storage tanks, piping, pumps j
and valves, whi:h are part of the Reactor Cbolant Pressure Boundary
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or Safety Syste=s, Shutdown and Centrol Syste s, Steam and Feed-
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water Systems, Cooling Water Systems, Purification and Cleanup 5
Systems, Sampling Syste=s and Radaaste Systems as stated in figures A.2.1 and A.2.2 are acceptable with the following exceptions:
AEC Classification
- Gmw Pcin Steam and Feedwater Lines Pain 5:eca Lmes f:rm Outer Contairm nt Isolatica Valve to Turbine Casing B
Turbine Bypass Lines (to Condenser)
B Teedwater Line Outside Primary Containre.nt (to Condenser)
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lisin Steam Line Drains ***
B HPCIS and RCICS Suction Lines to Condensate Storage B
Tank Reactivity Control System Insert and Witncnra Lines (Outside RCPB)
B Control thit Required for Scra:
B B
Stendby Liquid Control System B
Liquid Cbntrol Storage Tank Padwaste Syste=s C
Liquid i m aaste Storage Tanks Other Auxilimv Syste:rs Crnoensate Water Storage Tank B
- Ihe ccces acol.icaole to tne AFC Classification Groucs are identified in the attached "Sim ay of Minimun ~
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Nuclear Codes and Standmis for Cccpenents of Water' (boled Nuclear Power Units."
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- isolf less than inree contawent isolation valves those portions extending frm the outemost cont
, each capable isolation valve up to the condenser, and connected pi i n
to and including the first valve which is eithe p ng up inthe Group B Classification. closed or capable of autcmatic r nomally
- lhose portions of the Main Steam Line Drains extendi their cemection with the Main Steam Lines up to ng from the first valve which is either nomally closed orand including auto'matic actuation, are to be included in the Group B capable of Classification.
Acceptable classifications for these exceptions are specified in the above tabulation.
Discuss the basis and justification for your specified classificarian in the light of th
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e reliance placed on these systems to prewnt or mitigate the conse quences of accidents or malfunctions originating within the reacto r coolant pressure boundary or to shutdown the reactor and maintai n it in a safe shutdom condition.
3' Altematively, indicate if compliance with the AEC cl assifications is intended, or if adoption of such classificati
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1 ons, at this stage, would result in hardships or unusual difficulties g.
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a compensating increase in the level of safety, or if deviati 5g frun these classifications will be campensated far by f
)i ons actors or design features which provide at least an egrivalent l evel of safety.
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I:elineate on the Piping and Instrunentation Diagrams for the j[f:
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Reacter Coolant Pressure Boundary and Associated Auxiliary II..
Systems the boundary Limits of each Classificatica Group by
'Q sa-the appropriate Group letter A, B or C.
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