ML20137L205
| ML20137L205 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 05/08/1996 |
| From: | FLORIDA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20137K821 | List:
|
| References | |
| FOIA-96-485 JPN-PSL-SEFJ-96, JPN-PSL-SEFJ-96-020, JPN-PSL-SEFJ-96-20, NUDOCS 9704070172 | |
| Download: ML20137L205 (8) | |
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JPN-PSL-SEFJ-96-020 Rev 1 4
Page 1 of a I
i FLORIDA POWER & LIGHT CO.
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1 ST. LUCIE UNIT 1 Engineering Evaluation i
1
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Refueling Equipment 1
Underload and Overload Settings 4
J 4
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i JPN-PSL-SEFJ-96-020 Rev 1 May 8, 1996 Quality Related Nuclear Fuel Nuclear Technical Support 9704070172 970402 PDR FOIA BINDER 96-485 PDR
4 JPN-PSL-SEFJ-96-020 Rev.
1 Page 2 of 8 REVIEW AND APPROVAL RECORD 4
i PLAllT st. Lucie trNIT 1
i TITLE Refuelina Eauipment Underload and Overload Settines LEAD DISCIPLINE Nuclear Fuel / PSL Fuel Encineerina ENGINEERING ORGANIZATION Nuclear Technical succort REVIEW / APPROVAL:
INTERFACE TYPE GROUP PREPARED VERIFIED ppg zern asnrw w/a nPPROVED APPROVED
- l ummmmmmunemusumman nummmun mummmmmmmmmmmmum--
MECH X
N/A N/A N/A ELECT X
N/A N/A N/A I&C X
N/A N/A N/A CIVIL
'X N/A N/A N/A NUC**
X N/A N/A N/A ESI X
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I JPN-PSL-SEFJ-96-020 Rev i Page 3 of a 1
l TABLE OF CONTENTS l
DESCRIPTION Pace I.
Purpose And Scope 4
II.
Calculation of Refueling Equipment Settings 4
III. Conclusions 7
i 7.
Verification Summary 8
s V.
References 8
ATTACHMENT 9
1.
Siemens Letter TMH:96:032 2 Pages 2.
Assembly and Equipment Weights.
2 Pages 3.
Refueling Equipment Weight Information.
6 Pages I
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JPN-PSL-SEFJ-96-020 i
Rev 1 Page 4 of 8 I.
PURPOSE AND SCOPE:
The purpose of this engineerira evaluation is to develop St. Lucie 1
Unit 1 (PSL1) refueling machine (RFM) and spent fuel handling i
machine (SFM) load cell settings.
The overload and underload setpoints will provide adequate margin during the refueling operations.
This margin will account for resistance encountered i
while lifting or lowering the fuel assemblies, without exceeding the fuel assembly and refueling equipment design limits.
The method used for setpoint calculation is similar to that used i
4 for St. Lucie Unit 2 (Reference 3).
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e II.
CALCULATION OF REFUELING FQUIPMENT SETTINGS:
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Refueline Machine In Reference 1 (Attachment 1)
Siemens Power Corporation (SPC) provided the St. Lucie Unit i fuel assembly information to be used in determining underload and overload settings on the refueling equipment.
The allowable safety value or the force limit from fuel assembly damage considerations has been specified as 200 pounds for the St. Lucie ' Unit 1 SPC fuel.
This value is representative of the maximum spacer side plate shear strength, which should be accounted for in determining refueling equipment load setpoints.
The I & C procedure 1-1400182 (Reference 2) currently has fuel only underload and overload limits as (1085
- 5) pounds and (1460 5) pounds, respectively.
The lightest and heaviest fuel assembly weights (Wet) used are 1096 pounds and 1131 pounds, respectively.
The weight data for the various components needed for the underloa'd and overload setpoint calculations are defined in Attachment 2.
Minimum Fuel Assembly Wet Weight =
1105 pounds Maximum Fuel Assembly Wet Weight (except VFRA) 1155 pounds
=
VFRA assembly Wet Weight = 1305 pounds Grapple Wet Weight = 130 pounds Hoist Box Wet Weight = 1130 pounds Hoist Box Partially Dry Weight = 1220 pounds These fuel assembly weights are comparable to those in Reference 2.
Per Reference 2, the part strength CEA wet weight is 57 pounds.
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i JPN-PSL-SEFJ-96-020
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i Rev 1 Page 5 of S i '
j The following load setpoints are calculated for the refueling i
machine.
1 Fuel Only Underload Max Assy Wt. + CEA Wt. - Grapple -
=
1 (Includes Grapple)
Safety Margin
=
1155 + 57 + 130 - 200 l
1142 pounds
=
For vessel fluence reduction assembly, the underload setpoint is calculated by using the VFRA weight without the CEAs.
The underload setpoint becomes (1305 + 130 - 200) = 1235 pounds.
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Using a margin of 5 pounds for calibration (Reference 2),
j Fuel Only Underload Setpoint becomes --> 1147 pounds.
For VFRA, the underload setpoint is 1240 pounds.
j ruel only overload Min Assy Wt.
+ Grapple
+ Safety
=
j (Includes Grapple)
Margin 1105 + 130 + 200
=
1435 pounds j
=
For VPRA, the setpoint is (1305 + 130 + 200) = 1635 pounds.
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Using a margin of 5 pounds for calibration (Reference 2),
' Fuel Only Overload Setpoint becomes --> 1430 pounds.
For VFRA, the overload setpoint is 1630 pounds.
Puel plus hoist underload setpoint provides protection to prevent fuel assembly movement out of the hoist.
This condition may occur if the hoist box becomes jammed during 1
lowering of the hoist with the fuel assembly inside.
The
. overload setpoint provides protection for the machine against damage by lifting weights'above certain limits.
The formulae provided below are obtained from Reference 4.
The setpoints
)
are calculated conservatively without accounting for the VFRA weight.
+
l Wet Hoist Wt. + Min Assy Wt.
Fuel +Eoist Underload
=
(Includes Grapple)
Grapple - Margin for operation 1130 + 1105 + 130 - 200
=
2165 pounds
=
Using a margin of 5 pounds for calibration (Reference 2),
Fuel + Hoist Underload Setpoint becomes --> 2170 pounds Partial dry Hoist Wt. - Max Assy Wt.
ruel+ Hoist Overload
=
Margin for Grapple (Includes Grapple)
+ CEA Wt.
+
+
Operation 1220 + 1155 + 57 + 130 + 250
=
2812 pounds
=
Using a margin of 5 pounds for calibration (Reference 2),
Fuel + Hoist Overload Setpoint becomes --> 2307 pounds
1 s JPN-PS,-SEFJ-96-020 L
l Rev 1 l
Page 6 of 8 l
Scent Fuel Handlina Machine The I & C procedure 1-1400183 (Reference 8) currently has underload and overload limits as (1283 1 5) pounds and (1575
- 5) pounds,
+
respectively.
The weight data for the various components needed for the underload and overload setpoint calculations are defined in Attachment 2.
Minimum Fuel Assembly Wet Weight =
1105 pounds Maximum Fuel Assembly Wet Weight (except VFRA) 1155 pounds
=
VFRA assembly Wet Weight = 1305 pounds SFM Tool Wet Weight = 293 pounds The following load setpoints are calculated for the spent fuel machine.
Max Assy Wt. + CEA Wt. + Tool Wt.
SFM Underload
=
(Includes Tool)
Safety Margin
=.1155 + 57 + 2 9 3 - 200 1305 pounds
=
For vessel fluence reduction assembly, the underload setpoint is calculated by using the VFRA weight without the CEAs.
The underload setpoint becomes (1305 + 293 - 200) = 1398 pounds.
Using a margin of 5 pounds for calibration (Reference 8),
Underload Setpoint becomes --> 1310 pounds.
For VFRA, the underload setpoint is 1403 pounds.
Min Assy Wt.
+ Tool Wt.
+ Safety SFM Overload
=
(Includes Tool)
Margin 1105 + 293 + 200
=
1598 pounds
=
For VFRA, the setpoint is (1305 + 293 + 200) = 1798 pounds.
Using a margin of 5 pounds for calibration (Reference 8),-
Overload Setpoint becomes --> 1593 pounds.
For VFRA, the overload setpoint is 1793 pounds.
Expected variations in water temperature and boron concentration would have a very small effect on the wet weights well within the applied margin.
J JPN-PSL-SEFJ-96-020 Rev 1 Page 7 of 8 III. CONCLUSIONS:
This evaluation has determined new underload and overload settings for the refueling machine and the spent fuel handling machine, consistent with the safety margin limit specified in Reference 1.
The setpoints are based on weights conservatively estimated based
/k on the available information.
Refuelina Machine Two sets of setpoints are provided for the refueling machine - one set for typical fuel assemblies and the other for the Vessel Flux Reduction Assemblies.
Fuel Assemblies Fuel only (with grapple) underload setpoint 114715 pounds Fuel only (with grapple) overload setpoint 1430 5 pounds VFRA VFRA only (with grapple) underload setpoint 124015 pounds VFRA only (with grapple) overload setpoint 163015 pounds Additionally setpoints are provided for fuel and the hoist.
These setpoints cover all fuel assemblies.
Fuel + Hoist (with grapple) underload setpoint 2170 5 pounds Fuel + Hoist (with grapple) overload setpoint 2s0715 pounds Scent Puel Machine Two sets of setpoints are provided for the SFP machine - one set for typical fuel assemblies and the other for the Vessel Flux j
ReductL n Assemblies.
3 Fuel Assemblies Fuel only (with grapple) underload setpoint 1310 5 pounds Fuel only (with grapple) overload setpoint 159315 pounds i
VFRA VFRA only (with grapple) underload setpoint 1403 5 pounds VFRA only (with grapple) overload setpoint 179315 pounds i
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i JPN-PSL-SEFJ-96-020 l
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IV.
VERIFICATION
SUMMARY
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This engineering evaluation, prepared per ENG QI 2.0, has been logically developed and used the necessary design and reference materials to support the conclusions derived.
The underload and overload settings evaluated here do not affect the safety of the plant.
These settings,
- however, are used on the refueling equipment as trip setpoints to maintain loads on the assemblies within the desired values for safe. fuel handling operations.
Therefore, this engineering evaluation has been classified as Quality Related.
V.
REFERENCES:
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1.
Letter, T. M. Howe (SPC) to R. J. Rodriguez (FPL), TMH:96:032, Spacer Side Plate Shear Strength Value for SPC Fuel in St.
Lucie Unit 1, February 14, 1996 (Attachment 1) 2.
I & C Procedure 1-1400182, Revision 1, Refueling Machine Load Cell Calibration 3.
JPN Evaluation JPN-PSL-SEFJ-95-043, Revision 3,
Refueling Machine Underload and Overload Settings 4.
Tech Manual 8770-5810 Vol I, R9, Refueling Equipaent Vol I
~
5.
JPN Calculation PSL-1FJF-91-060, Revision 0, Core Design and Isotopic Inventory Input Data for the Modular Accident Analysis Program (MAAP) St. Lucie Unit 1 6.
Glasstone Sesonske, ' Nuclear Reactor Engineering, Van Nostrand Reinhold Co.
7.
PC/M No. 054-194, Fuel Reload for Cycle 13 (St. Lucie Unit 1),
Revision 0 8.
I & C Procedure 1-1400183, Revision 2, Spent Fuel Machine Load Systems Calibration 9.
St. Lucie Unit 1 Cycles 12 and 13 Refueling Log (Attachment 3),
10.
Mark's Standard Handbook for Mechanical Engineers, Seventh Edition, McGraw Hill Book Company (Page 6-80)
L
.i, Inter-of fice Correspondence rD.'"
Tf FPL JPN-SPSL-96-0218 To:
S.A. Valdes Dater May 11, 1996 WhRobN-p rrom:
D.J. Denver Department: JPN/NF/JB s ub] ect :
St.
Lucie Unit 1
Refueling Equipment Underload and Overload Settings
<'x JPN-PSL-SEFJ-96-020, Rev. 2 'N w_ _
Attached is a safety evaluation performed by Nuclear Fuel related to the refueling equipment load cell setpoints.
These setpoints are based on the available equipment and fuel assembly weight information.
Revision 2 to this evaluation has determined that there is no unreviewed safety question associated with the proposed changes.
If you have any questions, please contact Jay Kabadi in Juno at 694-3364.
Attachment:
JPN-PSL-SEFJ-96-020, Rev. 2 xc:
F. Gusmano M. C. Guth D. W. Howard J. N. Kacadi R. M. Klein L. A. Martin K. H. Nordmeyer C. G. O'Farrill C. Villard w/o R. W. Winnard b
P b
.