ML20052D240
| ML20052D240 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 04/29/1982 |
| From: | Hiatt S OHIO CITIZENS FOR RESPONSIBLE ENERGY |
| To: | CLEVELAND ELECTRIC ILLUMINATING CO. |
| References | |
| NUDOCS 8205060393 | |
| Download: ML20052D240 (3) | |
Text
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RELaTEu ccaatsawnsncs UNITED STATES OF AMERICA April 29, 1982 NUCLEAR REGULATORY COMMISSION C0f yrr.-
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Before the Atomic Safety and Licensing Board
'gp IM ~3 p337 In the Matter of
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I CLEVELAND ELECTRIC ILLUMINATING Docket Nos. 50 so ~
COMPANY, Et A1.
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50-441
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(Operating License'.)' I ?>
(Perry Nuclear Power Plant,
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[f Units 1 and 2)
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SECOND SET OF INTERROGATORIES TO APP C~,;g g' 4p+
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' Ohio Citizens for Responsible Energy ("0CRE") her % I #
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propounds its second set of interrogatories to the Applicants, pursuant to the Licensi'ng Board's Memorandum and Order of-July 28, 1981 (LBP-81-24, 14 NRC 175 (1981)).
Statement of Purpose The following interrogatories are designed to ascertain the susceptibility of the Applicants 5 facility to the LOCA scenario resulting from a pipe break to the scram discharge volume postulated in ICREG-0785.
Interrogatories
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2-1.
Produce piping and instrumentation diagrams for the-
!1 scram discharge volume (SDV) and scram discharge instru-a ment volume.(SDIV).
Please reference the responses to g
the subsequent interrogatories to said diagrams when it 2
is appropriate to do so.
2-2.
Produce isometric drawings of the 'SDV and SDIV and all associated piping for these.. systems, showing their exact
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location within the plant, e' specially with regard to the
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following:
(a) LPCI pumps (b) LPCS pumps (c) HPCS pumps (d) CRD pumps 2-3.
Is any of the equipment listed in (a) to (d) of inter-rogatory 2-2 above located at an elevation below that of j
i the SDV system or any portion thereof?
Provide elevation figures for each item listed in interrogatory 2-2 above 1
and for the SDV system as well.
Enumerate any differences f
1 in those figures for Units 1 and 2.
Ilu Are there valves upstream of all scram discharge piping 2-4.
..which can be closed in the event of an SDV pipe break?
If so, enumerate such valves, describing whether they are E
E manually-or power-operated, and if power-operated, h:
detailing any interlock systems or circuits which can t
prevent or delay the closure of such valves.
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2-5.
Does Applicants 2 design include redundant and diverse jf Ed indication of an SDV pipe break?
I.e.,
are there tem-gg 55 perature, humidity, or radiation monitors at or near the 53 Ed SDV or SDIV?
If so, to what extent?
EU 55 2-6.
What emergency operating procedures will the reactor h
51 operators have to assure appropriate response to a break 55 4
tZi in the.SDV system?
55
-55 2-7.
Would water from an SDV pipe break in the PNPP design w
55
--a flow to or into the suppression pool?
Illustrate why this
]h TL would or would not happen.
E55 Efi 2-8.
Are the water level indicators in the reactor pressure bb!
t".i2 vessel the only way a break in the SDV would be detected?
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If not, please explain.
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2-9.
How sensitive to water loss (gpm) is the PNPP reactor pressure vessel?
2-10.
Does PNPP follow the GESSAR-238 standard design for the SDV?
If not, enumerate and explain any deviations from that standard design.
2-11.
Have there been any modifications in the FSAR due to regulatory efforts with regard to SDV pipe breaks?
If so, at what points in the FSAR?
Provide any such modifications.
2-12s Is there any way in which an SDV piping break can occur and not be isolated in the current PNPP design?
If so, explain.
2-13.
What are the dimensions of the largest piping in the SDV piping system?
Identify that portion of the piping.
2-14.
Is operability of the Hi-level scram independent of SDV venting or draining requirements as recommended in the 6/1/80 letter from Michelson (AEOD) to H. Denton (Office of NRR, NRC)?
2-15.
Has the SDV system been installed in Unit 1? In Unit 27 If so, give the date of completion or present percentage of completion for each unit.
2-16.
Identify the location in the SDV system of Unit 1 of the damage resulting from the suspected act of vandalism described in PNO-81-109 (December 9, 1981).
Describe the measures taken to correct any damage caused thereby.
Respectfully submitted, j
usan L. Hiatt OCRE Interim Represnetative