ML19206B318
| ML19206B318 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/29/1974 |
| From: | Stello V US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Moore V US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19206B317 | List: |
| References | |
| 740726, NUDOCS 7905090124 | |
| Download: ML19206B318 (4) | |
Text
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is Cocket No. STN S3-320 V. A. Moore, Assistant Director for Light Water Reactors Grcup 2. L FIRST RCUND QUESTIONS - THREE MILE ISLAND NUCLEAR STATION, UNIT 2 Plant Name:
Three Mile Island, Unit 2 Licensing Stage:
CL Docket No.:
STN 50-320 Respcnsible Sranch thR 2-2 and Project Manager:
B. Washburn Technical Review Sranch Involved:
Reactor Systecs Branch Requested Completion Date:
August 23, 1974 Description of Review:
First Round Questions Review Status:
Awaiting Information Acequate responses to the enclosed list of questions prepared by the Reactor Systems Branch are required before we can complete our review of the subject application. This recuest ccncerns cccoliance by the applicant with the Codes and Standards Rule, Section 50.5Sa of 10 CFR Part 50, System Quality Group Classifications and Se:smic Classifications of fluid systems impcrtant to safety.
Oricinal Si:;ned by '
Victcr Ste!!o Vic+wr Stello, Jr., Assistant Director for Reactor Safety Directorate of Licensing
Enclosure:
Questions cc:
S. Hanauer Dis *ibution:
p J. Hendrie Mocket Files A. Gia::tusso RSB Reading W. Mc0cnald w/o encl.
L Reading K. Kniel y, Stello B. Washburn N. Novat R. Kirkwood S. Varga n 1i0 E. Leins R. Radlinski RSB g g 055-RSB AD/RS r
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..JStdB o 7/N/74 7/ /74 7bf/74 7/2L/74 Form AEC-313 (Rev. 9-5)) AICM 0240 1"r w. s. cow s== = s=7 p=*mn=e or pse ss s ou sae-t ee 7 90 5 09 0/y :
s 21-1 21.0 REACTC? SYSTE"5 EECH 21.1 In Table 3.2-1, the berated water storage tank is classified (3,2,2)
Quality Group B.
Mcwever, the sucticn line to the decay neat renoval cur:s is classified Cuality Groua C fr:m the S'..ST to valves CH-75A/3.
This line shcuic be Cuali / 3rcus 3 in its entirecy, and ne Three P.ile Islanc '; nit 2 (TMI-2) acplied code should be nNSI B31.7, Class II.
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21.2 In Table 3.2-1, several lines connected to the bcrated water (3.2.2) storage tank and tne sodium hycroxide s:crage tank are classified N-3.
Since these tanks are classified N-2, all lines connected to the tanks belcw the ncemai luid level should be classifiec N-2 cut to and including :ne first ncrmally closed isclation valve or a valve :apable of autcmatic closure.
21.3 In Table 3.2-1, the line from the sedium hydroxide storage tank (3.2.2) to valves DH-V134A/B is classified as Quality Grouc C.
This line should be Quality 3rcup B and the TMI-2 apolied ccde should be ANSI B31.7, Class II.
21.4 In Table 3.2-1, the diesel generator fuel oil system and ali (3.2.2) of the diesel generator auxiliary system: should be classified Quality Group C.
21.5 In Table 3.2-2, you state that auxiliary piping essential for a (3.2.2) safe shutdcwn is classified as Quality Group D.
inis is inconsistent with the classificaticn you have assigned essential systems in Table 3.2-1 and on the system Ccw diagrams.
Quality Group D is not acclicable to systems essential to a safe shutdcwn.
Revise Table 3.2-2 accordingly.
21.6 In Table 3.2-1, the reacter buildinc cenetraticns of the reactor (3.2.2) building emergency ccoling water system and the intermediate closed cooling water systen are incorrectly classified as Quality Grcup C.
This pcrtien of these systems sncula be classified Quality Group B and the Eil-2 applied ccde should be in accordance with note 2 of Table 3.2-1.
21.7 In Table 3.2-1, the spent fuel pcol pumos, the berated water (3.2.2) recirculation puros and the scent fuel ccolers are incorrectly classified as Quality Group D.
This ecuipment should be classified Quality Group C.
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21-2 21.8 In Table 3.2-1, the condensate s:crage tanks are classifisc (3.2.2)
Quality Group C and the TMI-2 acpiiec ccce is AS?'E Section III, Class C.
Since the scope of tne 1963 edition cf ASME Section III does not include etncscheric tanks, describe hcw jeu intend to apply tais code to tne concensate s:crage tanks. Accectable stancarc: for tne constructicn of tnese tanks are API-650, AbWA-OlCO cr ANSI E96.1 with the follcwing ncn-destructive test requirements for tank welds:
Sidewalls Liquid Penetrant or Magnetic Particle Roof Visual Roof to Sidewall Visual Bottom Vacuum Box Bottom to Sidewall Vacuum Box Nozzles Liquid Penetrant or Magnetic Particle 21.9 In Table 3.2-1, you indicate that tne Cual:ty Group C ciping (3.2.2) will be constructed in accordance with ANSI 331.1.0.
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1ddition to the requirements of ANSI E31.1.0 and the design features indicated in the notes to Table 3.2-1, all welcs in Quality Grcuo C ciping larger than 4 incnes shall be exanined by either tne magnetic ; article or liquid penetrant method in accordance..ith ANSI B31.7, Clas; III.
21.10 In Table 3.2-1, you incorrectly state that the decay heat closed (3.2.2) cooling water system coolers, pumps, surge tanks, piping, anc valves will be constructed in accorcance witn ANSI B31.1.0.
This equipment should be constructed in accordance with ASME Secticn VIII, ANSI B31.7, or the Craft ASME Ccde for Pumps and Vaives, as applicable.
21.11 In Table 3.2-1, you indicate that the borated water storage tanks (3.2.2) will be constructed in accordance with AhWA-DlCC-67.
In additien, non-destructive testing should be ;erformed on tne SWST welds in accordance with the follcwing:
Sidewalls 1005 Radiographic Roof Visual Roof to Sidewall Visual Bottom Vacuum Box Bottom to Sidewall Vacuum Ecx and.iagnetic Particle or Liauid Penetrant Nozzles Magnetic Particle or Liquid Penetrant 21.12 In Table 3.2-1, for ecuicment which is to be ccnstructed in (3.2.2) accorcance witn ANSI 531.7 or the Draf t ASME Ccce for ?unts and Valves, indicate tne ccde class where ycu have not alreacy dcne sc.
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21 -3 21.13 In Table 3.2-1, all ecui:rart car.structed in accordance with (3.2.2) the Craft ASME Code for Pu :s and Valves, Class I cr Class II, shall be examined as follc.,s: All cressure retainir.g cast parts shall be radiogra;hed (Or ultrascnically tested to equivaient standarcs).
<.here si:e er ccn'iguraticn cces not permit effective voluretric examinaticn, ragne-ic : article cr liquid ;enetrant examinaticn may be sucstitutec.
Examir.atico procecures and acce:tance stancarcs snail be at least ecuivalen:
to those specified in the a:clicacie class in the ccce.
21.14 In Table 3.2-1, valves MU-VS and 79 of the Makeuo and Purifica:icn (3.2.2) system are incorrectly classifiec as Craft AS"E Ccce far Pum:s and Valves, Class III.
These v.alves shcula be Clcss II of the Draft ASME Code.
Pl.15 In Table 3.2-1, you indicate that the piping frcm the sccium (3.2.2) thicsulfate tanks to valves SS-V4A/S is classified Cuality Grcup C.
This portion of the sys am snculd be Cuality Grouc 3 and tne Dil-2 applied coce snould be in accordance with note 2 of Tabl e 3. 2-l'.
21.1 6 In Table 3.2-1, you indicate that the pioing frcn valves (3.2.2)
BS-V105A/3 to the reactor building spray header no les is classified Quality Group C.
This portion of the system shculd be Quality Group B and the TMI-2 apolied code should be in accordance with note 2 of Table 3.2-1.
21.1 7 Figure 6.3-1 does not provide adecuate informaticn to relate the data in Table 3.2-1.
Revise Figure 6.3-1 to indicate
(.2.2) 2 piping class 1:1caticns and provide valve numbers whicn relate to the informaticn in Tcble 3.2-1.
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