ML20106J260
| ML20106J260 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 02/17/1984 |
| From: | Brainer D ILLINOIS POWER CO. |
| To: | |
| Shared Package | |
| ML20106J231 | List: |
| References | |
| RTR-NUREG-0737, RTR-NUREG-0835, RTR-NUREG-737, RTR-NUREG-835 3C10-1082-002, 3C10-1082-2, NUDOCS 8411010148 | |
| Download: ML20106J260 (9) | |
Text
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S U.DSURE #2 NSLD
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Calc. No. 3C 10- 10 82-002 Date: February 17, 1984 Revision :
2 Page:
1 Safety Related - Yes Prepared by D /) *1},&
Date
/$/r. 8, /984.
'I 8 Reviewed.by Date Date FEB 171984
-Approved by v
IMPLEMENTATION OF BWR EMERGENCY PROCEDURE GUIDELINES INTO SPECIFIC EMERGENCY PROCEDURES Illinois Power Company Clinton Power Station-Unit 1 Project No. 6114-24 BPg1010148841024 ADOCK 05000461 PDR 1 of 9
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Calc. No. 3C10-1082-002 Revision:
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33 Project No. 6114-24
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9.-. Primary Containment Pressure Limit (BWROG Procedure C14.0) 2 A..
Purpose The purpose of this proce' dure is to determine the primary containment pressure limit which provides for containment pressure' control before the ultimate strength of the containment is exceeded.
B.
Assumptions and Information l..
The primary containment pressure limit was based on the stress capacity of the containment spherical head equipment hatch which was determined to be the limiting structural component (Reference 9).
Taking into account the recommended 1.2 load reduction factor (Reference 3), the total load of 63 psig was determined to be the stress capacity of the equipment hatch and therefore represents the ultimate strength
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of the~Clinton containment.
2.
Throughout these calculations, the elevation of the bottom _of the equipment hatch will be used as the limiting containment stress location.
3.
The containment water level of approximately 68.5 ft (above_ the basemat) should be considered the maximum l
containment flooded condition based on the containment j
spherical equipment hatch as the limiting structural i
component (Reference 13).
17 C.
Method of Analysis The calculational method is described in Calculational Procedure C14.0 of Reference 1.
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Calc. No. 3C10-1082-002 Revision-0 Page:
34 Project No. 6114-24 D.
Results and Discussion The primary containment pressure limit is shown in Figure 14-1.
To maintain the stress on the equipment hatch below its ultimate load capacity, the combined loads due to containment pressurization and containment flooding must be maintained.in the region bounded below the primary containment function (outside the cross-hatched area).
The containment pressure can be measured by two pressure transmitters, 1PT-CM034 located at elevation 782'-6" or 1PT-CM035 at elevation 792'-0" (Appendix B, Reference 6).
The containment' water level is never expected to exceed approximately the 780'-6" elevation (Reference 13).
The complete set of calculational worksheets used for this procedure can be found in Appendix A of this report.
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m Calc. No. 3C10-1082-002 Rsvision:
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Revision 2 (draf t) 7/1/32 4 of 9
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Calc. No. 3C10-1082-002 Revision:
2 Page: _ A63 Project No. 6114-24 9
Primary Containment Pressure Limit (BWROG Procedure C14.0) 2 The following calculational worksheets and design parameters were used to evaluate the above referenced BWR Procedure Guideline.
All relevant graphs and tables have been included for. reference purposes.
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Calc. No. 3C10-1082-002 Rsvision:
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A64 Project No. 6114-24 APPENDIX C
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CALCULATIONAL PROCEDURES 14.0 PRIMARY CONTAIM!ENT PRESSURE LIMIT 14.1 APPLICABLE GUIDELINE STEPS PCl?-6 If suppressicn ch:=ber pressure cannot ba r.aintained belcu the Primary Cantainmen: Pressure Limit, then irrespec:ive of uhe:her.
l adequate core cooling is assured...
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?C/P-7 If suppression cha:~ber pressure exceeda :he Prim "y Contair.mcn:
Pressure Limit, ven: the primary ccntainment in accariance 'Ji:h (procedure for contain=en: ven:ingl to reiu:e and main::in pres-sure belou the Pri..ary Can::inmen: Pressure Limi:.
C6-6 lO:en suppressicn ch:=ber prescure can be main::ined belou :he Prinary Con: in en: ?ree::.re 'Limi:, en:er (precedure developed from :he n?Y Ccn:roi Guidelinal a: (Steps RC/L and RC/?-4) and ere:u:e ch.ese a e:.: :cnx erer.:Ly.
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Calc. No. 3C10-1082-002 Revision 0
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A65 Project No.- 6114-24 14.2 INPUT PARAMETERS AND PHYSICAL CONSTM;TS E
Elevation corresponding to the SP.FSAR suppression pool water level assumed in FSAR transient analyses
Maximum Pressure at which the SCm suppression chanber is not expected to fail with suppression pool water level at ESP FSM 5 Psis PSC, MAX} -
E Elevation of the suppression chamber SCPI
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Cit.-2 Revision 2 (draf t; I
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- Calc, No. 3C10-1082-002 Revision:
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A66.
Project No. 6114-24 i
14.3 TECHNICAL DESCRIPTION AND DERIVATION OF THE CALCULATIONAL PRCCEDL~d5 The Primary Containment Pressure Limit. is the maximum pressure at which failure is not expected to occur at the most li=iting contain=ent location. Calculation of the limit is based on the same considerations di'scussed in the Primary Containment Desi~gn Pressure calculational pro-cedure, Appendix C, Section 13.
If the maxi =um allowable pressure is substituted for design pressure, the two procedures are identical.
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s C14-3 Revision 2 (draf:)
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Calc. No. 3C10-1082-002 Revision:
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A68 Project No. 6114-24 4.
Complete construction of the Primary Containment Pressure Limit Curve as follows:
(1) Extend a horizontal line from Point h to the graph's vertical axis.
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(2) Layout E.
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I (3) ExteEdahori:entallinetotherightfrom Point h.
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C14-5 Revision 2 (draf c) s 9 of 9 7/1/82
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