ML20138G875
| ML20138G875 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 11/08/1996 |
| From: | NORTHERN STATES POWER CO. |
| To: | |
| Shared Package | |
| ML20138G863 | List: |
| References | |
| D95.2, NUDOCS 9701030042 | |
| Download: ML20138G875 (57) | |
Text
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', ' PRAIRIE ISLAND NUCLEAR GENERATIN3 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
D.
'Section?~
TN-40 CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 1 of 57 l
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.t PRAIRIE ISLAND NUCLEAR GENERATIN3 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES i
TITLE NUMBER:
TN-40 D95.2 D
, Sectio'n CASK UNLOADING PROCEDURE REV: 2 Page 2 of 57 TABLE OF CONTENTS Section Title Page 1.0 PURPOSE................................................... 4 l
2.0 REFERENCES
............................................... 4 i
3.0 P R EC AUTI O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 l
4.0 SPECIAL EQUIPMENT AND PERSONNEL REQUIRED . . . . . . . . . . 6 5.0 SPECIAL CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 i
6.0 P R E R EQ U I S ITES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7.0 C AS K TO P R EPAR ATIO N AR EA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 8.0 CASK TO SPENT FU EL POOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 9.0 ATTAC H M EN TS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 LIST OF TABLES I TAB LE 1 - R EQ U I R ED TO O LS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 LIST OF FIGURES FIG U R E 1 - TN -4 0 CAS K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 .
1
- FIGURE 2 - TN-40 CASK TRANSPORTER . . . . . . . . . . . . . . . . . . . . . . . 30 FIGURE 3 - TN-40 CASK TRANSPORTER . . . . . . . . . . . . . . . . . . . . . . . . . 31 FIG U R E 4 - LI FT B EAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 l FIGURE 5 - CRANE HOOK EXTENSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 FIGURE 6 - LIFT BEAM AIR CONTROLLER . . . . . . . . . . . . . . . . . . . . . . . . . 34 FIGURE 7 - SAFE LOAD PATH INTO AND OUT OF THE 35 T R AN S P O RT E R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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'. PRAIRIE ISLAND NUCLEAR CENERATIN3 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TELE NUMBER:
TN-40 D95.2 D CASK UNLOADING PROCEDURE REV: 2 s.eu n 4 Page 3 of 57 TABLE OF CONTENTS [ CONTINUED]
SectlOn Title Page LIST OF FIGURES [ CONTINUED]
FIGURE 8 - BOLT TORQUING ORDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 FIGURE 9 - BOLT TOROUING ORDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 FIGURE 10 - LID LIFTING ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 FIGURE 11 - BOTTOM PROTECTIVE COVER . .. . . . . . . . . . . . . . . . . . . . . . 39 FIGURE 12 -SAFE LOAD PATH TO AND FROM THE DECON AREA . . 40 FIGURE 13 - CASK ORIENTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 FIGURE 14 - CASK VENT PORT ADAPTER . . . . . . . . . . . . . . . . . . . . . . . . . 43 FIGURE 15 - TOP FACE PROTECTIVE COVER . . . . . . . . . . . . . . . . . . . . . 44 APPENDICES APPENDIX A - CASK LOADING REPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 APPENDIX B - TRANSPORTER OPERATING PROCEDURE . . . . . . . . . . . . . . 46 APPENDIX C - LIFT BEAM OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . 52 APPENDIX D - LIFTING DEVICES VISUAL CHECK . . . . . . . . . . . . . . . . . . . . . . 56
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. PRAIRIE ISLAND NUCLEAR CENERATING PLANT l NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
D' Sectioni TN-40 CASK UNLOADING PROCEDURE REV:
D95.2 2
Page 4 of 57 ,
1.0 PURPOSE This procedure provides detailed instructions for the unloading of a spent fuel storage cask.
It relies on several procedures and plant practices, in addition to the steps detailed here, to safely take a cask from the cask pad and into the Spent Fuel Pool.
2.0 REFERENCES
2.1 Prairie Island independent Spent Fuel Storage Installation Technical Specifications and Safety Analysis Report 2.2 ANSI N14.5-1987 2.3 T.S.3.8 2.4 C16, Spent Fuel Cooling System 2.5 C17, Fuel Handling System 2.6 D5.1, Spent Fuel Pit Fuel Handling Operations 2.7 NX-42093-1 TN-40 Lift Beam l 3.0 PRECAUTIONS l
3.1 The local temperature indication in the 121 SFP will not be operable during the pool !
level lowering. The alarm function and the indication outside the SFP will remain operable. The temperature in the 121 SFP can be expected to rise about 1 F/hr while the level is down. Minimize the time the water level is reduced.
3.2 There will be a low level alarm on the 121 SFP and may be a high level alarrn on the 122 GFP while the pool level is reduced.
i 3.3 Use particular care when working over and around cask sealing surfaces to prevent l inadvertently damaging them.
l 3.4 The surface of a loaded cask may be uncomfortably hot. l 3.5 Time spent above the loaded cask after removal of neutron shielding, and below the l loaded cask at any time SHALL be minimized due to the potentially high neutron dose rates (> 150 mrem /hr).
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, PRAIRIE ISLAND NUCLEAR C ENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 5 of 57 3.6 Radiation monitor R5 may alarm while the loaded cask is being moved into the water in the SFP.
3.7 IE SFP Special Ventilation starts due to high airborne contamination, THEN the l
autostart is reportable as an unplanned ESF actuation. Should SFP Special Ventilation Etart as a result of radiation shine from the cask onto R25 and R31, the autostart is not considered reportable.
N 3.8 The lower trunnions SHALL NOT be used to lift the cask while it is loaded with fuel.
3.9 The transporter should be brought into the Auxiliary Building prior to use if the temperature in the storage location is below freezing. Sufficient time should be given to allow the equipment to warm to above 35 F.
3.10 The lift beam SHALL be stored in the Aux. Building 24 t1ours prior to use to ensure its temperature is greater than 40 F. The temperature of the lift beam should be taken if it is believed it is < 40 F.
3.11 The cask trunnions were designed to be used between air temperature of -40 F and
+120 F. Operations outside these bounding conditions must be evaluated.
3.12 All slings and lifting devices used during this procedure SHALL be inspected prior to use.
3.13 The safe laydown areas for the cask include the 695' elevation of the rail bay, the 695' elevation of the cask decon area and the 713'-6" elevation of the 121 SFP. No other area is to be used to set the cask.
3.14 When the Aux Building Crane main hook is within 1 foot of high hook, the rotary limit switch enters a dead band. Do not lower the cask unless 2 feet of clearance is available.
3.15 A safe load path has been marked in the south end of the Aux. Building. This path SHALL be followed when the cask is entering or exiting the SFP enclosure. An individual SHALL be designated to assist the crane operator to ensure the safe load path is followed.
The following safety related structures are in the path of the cask:
A. SFP cooling lin'es on the south wall of the SFP.
B. SFP structure.
C. SFP stainless steel liner.
D. Spent fuel and spent fuel racks north of the cask laydown area.
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, PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 6 of 57 3.16 The individual supervising the cask operations SHALL ensure that individuals not directly involved with the work being performed do not become a distraction to the workers.
3.17 Work not associated with the cask SHALL be suspended in the SFP or the south side of the spent fuel enclosure during cask activities.
4.0 SPECIAL EQUIPMENT AND PERSONNEL RECLUlBE_D_
4.1 See Table 1 for required tools.
4.2 Personnel from Maintenance, Operations, Radiation Protection, Security, Engineering and Nuclear Plant Services are required at a minimum.
5.0 SPECIAL CONSIDERATIONS The regulatory and political sensitivity of returning a loaded cask to the SFP cannot be over emphasized. Care must be taken to perform every step in a thoughtful manner while maintaining a questioning attitude. Should anything not look right during the performance of this procedure it is imperative that the issue be resolved prior to proceeding. All those involved in the performance of this procedure shall have their questions satisfactorily answered prior to having to perform their task. Pre-job briefings SHALL be repeated for each shift.
6.0 PREREQUISITES 6.1 The fc ,owing PMs have been completed within the past year:
PM 3560-25, Crane Hook Annual NDE PM 3160-3, Aux Bldg Crane Mech insp PM 3130, Cask Transport Vehicle N 6.2 SP 1077, Special Lift Fixture for TN-40 Cask, has been completed within the last year 25%.
6.3 A walkdown of the road leading to the ISFSI has been performed to verify there are no washouts, potholes or snow buildups that will inhibit safe passage of the transporter to and from the ISFSt.
6.4 A SFP Work Permit is attached to this procedure.
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. PRAIRIE ISLAND NUCLEAR GENERATING PLANT i
NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TRLE NUMBER:
TN-40 D
S$ction CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 7 of 57 Prerequisite 6.5 SHALL be completed prior to lifting the NOTE:-
cask.
6.5 SP 1402, Auxiliary Building Crane and Lift Beam inspection SHALL be completed within seven (7) days prior to lifting the cask with the Aux Building crane.
Date Comp
-NOTE *, - Prerequisites 6.6 - 6.13 SHALL be completed prior to moving the cask into the water.
6.6 The applicable prerequisites for D5.1, Spent Fuel Pit Fuel Handling Operations are complete.
6.7 The water level in the SFP is at or near the low limit, approximately 3' below the deck.
6.8 The SFP water clarity is sufficient to safely handle fuel.
6.9 The temperature of the SFP is less than 110 F. The SFP temperature can be expected to rise 1 F/hr once SFP cooling has been shut off.
6.10 Portable underwater lighting is available.
6.11 Underwater cameras and VCR equipment are available.
6.12 All replacement seals required for cask reassembly are available, if necessary.
6.13 Boron concentration in SFP is > 2280 ppm. Record on Appendix A, Cask Loading Report.
7.0 CASK TO PREPARATION AREA 7.1 Perform a pre-job briefing for individuals involved in moving the cask to the Aux Building. Attach PINGP 1112. The pre-job briefing SHALL include a review of the procedure precautions and special considerations.
7.2 Disconnect the cask pressure monitoring system.
7.2.1 Close the seal monitoring isolation valve at the top of the cask.
. PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATE 2 POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER: ;
TN-40 D95.2 D< CASK UNLOADING PROCEDURE REV: 2 I
' Section :
Page 8 of 57 7.2.2 Vent remaining pressure from tubing by opening the fill and vent valve on the transmitter manifold.
7.2.3 Disconnect the tubing and supports between the cask isolation valve and the pressure transmitter.
7.2.4 Disconnect the alarm signal cable from the pressure transmitter.
Tape the end of the cable and coil up inside its pullbox.
Disconnect conduit and associated hardware.
7.2.5 Remove the transmitter stand and pressure transmitter. ,
7.2.6 Place all of the disconnected equipment in the equipment storage building.
7.2.7 Check the alarm monitoring panel to acknowledge status of the casks. '
- 1. In the event of an unexpected cask lowering during movement to the ISFSI, consult procedure F3-2 for classification and evaluate appropriate corrective actions.
- 2. Figures 2 and 3 provide identification and location of many of the transporter components.
- 3. The transporter speed SHALL be administratively limited to 3 miles per hour.
7.3 Prepare the transporter for cask loading.
7.3.1 Connect the transporter to the tow vehicle using the applicable sections of Appendix B, Transporter Operating Procedures &N_D N move into position to load the cask.
7.3.2 Startup the transporter using Section 1.0 of Appendix B, Transporter Operating Procedures.
7.3.3 Set the transporter parking brakes.
7.3.4 If necessary, disconnect the tow vehicle from the transporter, Appendix B, Section 2.0.
B B
. PRAIRIE lsLAND NUCLEAR CENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
Section CASK UNLOADING PROCEDURE AEV: 2 1 Page 9 of 57 Once the Jack feet touch ground and engage the loar8, the
. NOTE: brakes are released to keep the jack feet from slidi::g, along the ground.
7.3.5 Raise the transporter using both left and right JACK EXTEND pushbuttons s.imultaneously until the rear wheels are just off the ground M re. :ase the parking brakes.
7.3.6 Set the transporter parking brakes.
7.3.7 Using the Control Pendant, unlock the rear turntables, switch them into the " LOAD" position, M lock them into position.
7.3.8 Release the parking brakes.
NOTE *. The Parking brakes are engaged once the rear tires touch the ground or if the transporter begins to move.
7.3.9 Lower the transporter using both left and right JACK RETRACT pushbuttons simultaneously M engage the parking brakes l when the tires touch the ground. Continue retracting jacks until l they are in the stowed position.
7.3.10 if disconnected, reconnect the tow vehicle to the transporter per Appendix B, Section 2.0.
7.3.11 Using the Control Pendant, set the cask links to the "OUT" position and fully lower the cask links.
7.3.12 Position the transporter and tow vehicle so that the transporter's centerline is approximately one inch of the centerline of the cask.
7.3.13 Release the parking brakes M back the transporter until the l cask is centered between the cask links.
7.3.14 Repeat Steps 7.3.3 through 7.3.6.
7.3.15 Using the Control Pendant, unlock the rear turntables, switch them into the " TRAVEL" position AND lock them into position.
7.3.16 Repeat Steps 7.3.0 - 7.3.9.
. PRAIRIE 10 LAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TRLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 10 of 57 CAUTION: DO NOT GET BETWEEN THE CASK LINKS AND THE l CASK. HANDLE CASK LINKS FROM THE OUTSIDE ONLY.
7.3.17 Use the Control Pendant to move the cask links to the "IN" position, where they should engage the upper trunnions on the cask. It may be necessary to manually maneuver the links to engage the trunnions. ,
- CAUTION: KEEP ALL PERSONNEL CLEAR OF THE CASK WHILE OPERATING THE HOIST.
7.3.18 Set the parking brake. l 7.3.19 Raise the cask by using the RAISE pushbutton on the Control Pendant.
It is possible to twist the cask within the restraints by raising and lowering the jacks with the restraints NOTE: connected. If rallef valves begin to vent pressure when moving jacks, the jacks have reached their limit. Keep ;
Jacks level to keep torque at a minimum.
7.3.20 linhook the lower cask restraints from their storage chains and attach to the cask lower trunnions. To fully engage the lower restraints, it may be necessary to place the cup over the trunnion while the jack arms are raised and lowered until the cup falls in place.
7.3.21 Verify that the pressure gauge on the Jack assembly is in the green band.
7.3.22 Shutdown the transporter per Section 4.0 of Appendix B, l Transporter Operating Precedure, in preparation for travel.
7.4 Notify Security that the transporter is ready to move to the Aux Building A_ND the Aux Building west rollup door limit switch will be removed.
7.5 With Security present, remove the limit switch on the Aux Building west rollup door to allow for sufficient clearance for the transporter.
. PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TRLE NUMBER:
d M
W TN-40 CASK UNLOADING PROCEDURE D95.2 REV: 2
' Section Page 11 of 57 NOTE: Stay north of the rail centerline, if possible.
7.6 Tow the loaded transporter into the Aux Building.
7.7 Disconnect the tow vehicle per Section 2.0 of Appendix B. l 7.8 Replace the Aux Building west rollup door limit switch. l 7.9 Remove the cask from the transporter.
7.9.1 Startup the transporter using Section 1.0 of Appendix B, Transporter Operating Procedures.
7.9.2 Unhook the lower cask restraints from the cask lower trunnions l and store using the storage chains. To fully release the lower '
restraints, it may be necessary to have someone pushing the cup off the trunnion, while someone else lowers or raises the jack arm until the cup releases.
7.9.3 Lower the cask with the LOWER pushbutton on the Control Pendant.
7.9.4 Manually clear the cask links from the upper trunnions. Use the Control Pendant to set the cask links to the "OUT" position.
7.9.5 Set the transporter parking brakes.
7.9.6 Remove the upper hoist assembly per the following procedure.
A. Attach the upper hoist assembly to the overhead crane.
There la no need to release hydraulic pressure when NOTE: disconnecting the hydraulic lines. The connections are self-sealing.
B. Detach all hydraulic lines at the appropriate quick-disconnect points. Tie back and secure.
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
Section CASK UNLOADING PROCEDURE REV: 2 Page 12 of 57 CAUTION: ENSURE THE HOIST CYLINDER IS PROPERLY SECURED.
FAILURE TO DO SO MAY RESULT IN PERSONAL INJURY.
C. Remove the clevis pin from the hoist cylinder. Secure the hoist cylinder in the fully extended position. l D. Remove the eight bolts holding the upper hoist hinges in place.
CAUTION: THE UPPER FRAME WElGHS 14,700 POUNDS AND IS CONSIDERED A HEAVY LOAD. DO NOT SUSPEND THE UPPER FRAME MORE THAN 20 FEET ABOVE A LOADED CASK. MOVE THE FRAME SO THAT IT IS NOT DIRECTLY OVER THE CASK UNTIL IT IS LESS THAN 20 FEET ABOVE THETOP OFTHE CASK.
E. Lift the upper hoist assembly away from the tra*1 sporter and store on its storage racks.
7.10 Remove the Protective Cover (approx. weight 1500 lbs.)
7.10.1 Carefully bleed off the OP system by opening the isolation valve.
7.10.2 Remove the bolts attaching the valve / plate assembly to the protective cover. Slide the valve / plate assembly inside the protective cover.
7.10.3 Remove the protective cover bolts (1-7/8" hex socket) A_N_Q store in the bolt storage box.
7.10.4 Attach rigging to the lifting lugs located on the top of the l
protective cover.
7.10.5 Remove the protective cover AND inspect the viton gasket for cracks before placing the cover on the floor. Note any cracking in Appendix A.
Gasket inspected Maintenance Date
. PRAIRIE i' LAND NUCLEAR CENERATIN2 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
Section :
CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 13 of 57 7.11 Remove the Overpressure (OP) Port Flange, OP Tank and Top Neutron Shield (approx. weight 2,000 lbs.)
Required Equipment
. Rigging e 1-7/8" hex socket and ratchet
. 3/8" hex key socket for removal of the OP port flange 7.11.1 Turn each OP port flange screw 1/4 turn counterclockwise following the sequence of Figure 8.
7.11.2 Turn each OP port flange screw another 1/4 turn counterclockwise following the sequence of Figure 8.
7.11.3 Remove all bolts and store in the bolt storage box.
7.11.4 Remove 4 bolts attaching the top neutron shield to the lid and store in the bolt storage box.
NOTE: Use blocking to support tubing above neutron shleid.
7.11.5 Attach rigging to the three lifting lugs on the side of the neutron shield ANQ slowly lift the neutron shield /OP tank straight up being careful that the OP port flange does not bind.
7.11.6 Move the neutron shield /OP tank assembly to its lay down area.
7.11.7 Set the assembly down in its lay down area being careful to place the assembly so that the OP port flange is sitting flat with no strain on the tubing. ;
7.11.8 Apply two layers of Griff tape over the OP port on the lid. !
1 7.12 Place the bottom protective cover in the cask decon area.
N 7.13 Perform Section 1.0 of Appendix D, Lifting Devices Visual Check.
PRAIRIE ISLAND NUCLEAR GENERATING FLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
. Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 14 of 57 7.14 Verify SP 1402, Auxiliary Building Crane and Lift Beam inspection, has
. been performed in the previous seven (7) days.
Last Date Complete Today's Date 7.15 Attach the lift beam to the crane by performing the applicable sections i of Appendix C, Lift Beam Operating Instructions.
. 7.16 Engage the lift beam to the upper trunnions per Section 4.0 of Appendix C, Lift Beam Operating Instructions.
1 While the Aux Building Crane la moving the cask into the Spent Fuel Pool, the crane switch will be in the NOTE *. " CRITICAL" position. In this condition, the crane will be unable to move more than 1 inch east or west once it passes the roof slot centerline and is within 6 feet either side of the enclosure.
7.17 Place the Aux Building Crane in the " CRITICAL" position.
7.17.1 Turn the key switch on the crane controls to the " CRITICAL" position.
Maintenance Date 7.17.2 Key switch on the crane controls verified in the " CRITICAL" position by an individual different from the individual who changed the key switch position.
Maar ance Date CAUTION: PERSONNEL MUST BE KEPT CLEAR OF THE AREA BELOW THE CASK DUE TO POTENTIALLY HIGH NEUTRON DOSE RATES.
7.18 Slowly lift the cask approximately one-inch and observe the crane, trunnions and lift beam for unusual noises, deformation or indication of improper function.
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 15 of 57
- 7.19 Lift the cask out of the transporter AND lower it onto the bottom protective cover in the cask decon area following the safe load path shown in Figure 11.
7.20 Attach the bottom protective cover to the cask by looping the cover attachment taglines over the cask trunnions AND securing them to their attachment points.
7.21 Release the lift beam from the cask per Section 3.0 of Appendix C, Lift Beam Operating instructions.
7.22 Raise the lift beam until it is clear of the cask 6ND store the lift beam and the crane hook extension on their storage racks.
NOTE *. Steps 7.23 to 7.25 may be completed as tim permits.
Continu. with Step 7.26.
CAUTION: THE UPPER FRAME WEIGHS 14,700 POUNDS AND IS CONSIDERED A HEAVY LOAD. DO NOT SUSPEND THE UPPER FRAME MORE THAN 20 FEET ABOVE A LOADED CASK. MOVE THE FRAME SO THAT IT IS NOT DIRECTLY OVER THE CASK UNTIL IT IS LESS THAN 20 FEET ABOVE THE TOP OF THE CASK.
7.23 Replace the upper hoist assembly onto the transporter:
7.23.1 Lift the upper hoist assembly with the Aux Building crane. ,
7.23.2 Lower the upper hoist assembly into place on the transporter.
7.23.3 Install the eight hinge bolts to the upper hoist assembly AND torque to 460 20 ft-Ibs.
Torque Wrench No. Calib Due 7.23.4 Reattach the clevis pin to the hoist cylinder.
7.23.5 Reconnect all hydraulic lines.
7.24 Notify Security that the transporter is ready to leave the Aux Building.
PRAIR E ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PRoCEDunEs TITLE NUMBER:
M Ear TN-40 D95.2 CASK UNLOADING PROCEDURE REV: 2 Section -
Page 16 of 57 7.25 Tow the transporter out of the receipt area using the tow dolly, Section 3.0 of Appendix B, Transporter Operating Procedures.
7.26 Position scaffolding around the cask. l 7.27 Evaluate the need to clean the cask to remove any dirt or chalking paint. Wipe down the cask as needed.
8.0 Q_ASK TO SPENT FUEL POOL 8.1 Perform a pre-job briefing for individuals involved in sampling and lid '
disassembly. Attache PINGP 1112. The pre-job briefing SHALL include a review of the procedure precautions and special considerations. :
1 1
CAUTION: THERE IS NO HANSEN FITTING ON THE DRAIN PORT OPENING.
8.2 Using the 5/8" hex key, iomove the vent port cover AND place the bolts in the bolt storage box. (Figure 9)
CAUTION: THE GAS SAMPLED FROM THE CASK WILL BE HOT. THE GAS SAMPLE WILL BE TESTED FOR BOTH RADIOACTIVE AND FLAMMABLE GASES. USE THERMAL GLOVES AND HANDLE WITH CARE.
8.3 Connect the sampling device to the vent port Hansen fitting and take a cavity gas sample. Process the sample per RPIP 4105.
RPS l HOLD: OC SHALL review this procedure for adequacy and add !
any steps or precautions necessary, based on cavity gae sample results, prior to proceeding:
OC Review Date: Plant Manager or designee:
8.4 Following OC recommendations and RPIP 4105 instructions, slowly depressurize the helium in the cavity until the cask has vented AND ;
remove the Hansen coupling with a 1-5/16" deep socket.
.- l
. PRAIRIE ISLAND NUCLEAR GENERATING PLANT '
NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TRLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 17 of 57 l CAUTION:, THERE IS NO HANSEN FITTING ON THE DRAIN PORT l OPENING. '
8.5 Using the 5/8" hex key, remove the drain port cover 6NfiQ place the bolts in the bolt storage box. (Figure 9) 8.6 Install the Hansen coupling on the drain port using a 1-5/16" deep ,
socket. l 8.7 Perform Section 2.0 of Appendix D, Lifting Devices Visual and Functional Check.
8.8 Attach the lid lifting assembly to the lid per the following instructions.
Required Equipment '
. 4 legged Lid Lifting Sling Assembly e 7/8" hex key and ratchet e 4 hoist rings 8.8.1 Attach the four hoist rings to the lid. See Figure 10. Each should be screwed into one of the equally spaced holes in the top of the lid. Each should be inserted fully and hinge towards the center of the lid.
8.8.2 Torque each hoist ring using a 7/8" hex key socket to 470, 20 ft-lbs.
Torque Wrench No. Calib Due 8.8.3 Center the crane hook over the lid and attach the lifting bale to the hook.
f 8.8.4 Carefully jog the crane upward until the slack is removed from any one of the lid lifting slings. Adjust each of the other turnbuckles as necessary to remove slack from the other slings.
8.8.5 Lower the crane hook and remove the lifting bale from the crane hook and place it in on the cask lid.
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. PRAIRIE I; LAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 18 of 57 l NOTE *. Steps s.s & a.10 can be performed at any tim. prior to going into the SFP.
8.9 If requested by the Radiation Protection Specialist, place temporary neutron shielding on top of the lid.
8.10 Measure nine (9) feet down from the cask flange and place Griff tape at four locations around the cask to eerve as reference marks when the cask is being raised and lowered in the SFP.
CAUTION: DO NOT REMOVE ALL 48 BOLTS.
8.11 Detorque the 48 lid bolts per the procedure below:
Required Equipment
, . 2-1/4 inch socket 8.11.1 Following the sequence shown in Figure 8, loosen all lid bolts 1/4 turn counterclockwise.
l 8.11.2 Repeat the loosening sequence by another 1/4 turn by ;
repeating Step 8.11.1. 4 8.11.3 Upon completion of both 1/4 turn cycles, remove the odd QB even bolts. Loosen the remaining bolts to hand tight.
8.12 Perform a pre-job briefing for individuals involved in cask movement into the SFP. Attach PINGP 1112. The pre-job briefing SHALL include a review of the procedure precautions and special considerations.
- . - . _ _ . _ =__
PRAIRIE 12 LAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
section .
CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 19 of 57 The boron sampling is required within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> of flooding the loaded cask. There la no requirement to perform NOTE:: subsequent sampling once the cask is in the pool unless there is reason to believe the concentration has changed significantly.
1 N 8.13 Within four (4) hours prior to flooding the cask, verify SFP boron concentration is >2280 ppm. Two samples must be drawn and analyzed independently by two separate individuals per RPIPs 3104,3313 and 3609. Record sample results on Appendix A, Cask Loading Report.
8.14 Verify Prerequisites 6.6 - 6.13 have been completed.
8.15 lE not already done, THEN move the weir gates into position to isolate the 121 SFP per W.O. .
8.16 Lower the level in the 121 Spent Fuel Pool per C16, Spent Fuel l Cooling System. '
8.17 OPEN the spent fuel pool enclosure roof hatches. l 8.18 Perform Section 1.0 of Appendix D, Lifting Devices Visual and Functior D Check.
8.19 Verify SP 1402, Auxiliary Building Crane and Lift Beam inspection, has been performed in the previous seven (7) days.
Last Date Cornplete Today's Date 8.20 Engage the lift beam to the upper trunnions per Appendix C, Lift Beam Operating Instructions.
NO7ti: Lay ut the lid lifting assembly so it unfolds without binding.
8.21 Attach the bale of the lid lifting assembly to the hook on the lift beam.
l l
- PRAIRIE ISLAND NUCLEAR CENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 !
l Page 20 of 57 !
While the Aux Building Crane is moving the cask into the Spent Fuel Pool, the crane switch will be in " CRITICAL" l NOTE *. Position. In this condition, the crane will be unable to move more than 1 inch east or west once it passes the roof i slot centerline and is within 6 feet either side of the I enciosure.
, 8.22 Place the Aux Building Crane in the " CRITICAL" mode.
)
8.22.1 Turn the key switch on the crane controls to the " CRITICAL" position.
Maintenance Date 8.22.2 Key switch on the crane controls verified in the " CRITICAL" position by an individual different from the individual who changed the key switch position, i
Maintenance Date l
CAUTION: PERSONNEL MUST BE KEPT CLEAR OF THE AREA BELOW THE CASK DUE TO POTENTIALLY HIGH NEUTRON EXPOSURES.
When the Aux Building Crane main hook is within 1 foot of NOTE: high hook, the rotary limit switch enters a dead band. Do not lower the cask unless 2 feet of clearance is available.
1 8.23 Move the cask into the enclosure. Steps may be worked concurrently. l 8.23.1 OPEN the SFP south double doors.
8.23.2 Unbolt the railing outside the SFP south double doors leaving one bolt in until the cask is ready to pass by. Mark the area i as a safety hazard AND keep people clear of the railing.
l 8.23.3 Remove the stantioned railing around the SFP to allow the cask to pass through.
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 21 of 57 CAUTION:- THERE IS SPENT FUEL IN THE RACKS IMMEDIATELY TO THE NORTH OF THE SAFE LOAD PATH. CARE MUST BE TAKEN TO MINIMlZE ANY CASK SWING WHEN MOVING THE CASK NORTH AND SOUTH TO ENSURE THE CASK DOES NOT PASS OVER OR IMPACT THE SPENT FUEL RACKS. USE BRIDGE JOG MOTIONS WHEN CASK IS IN THE SFP BELOW THE 755' LEVEL.
8.23.4 Move the cask within the safe load path as shown on Figures 12 and 13, and as delineated on the floor and railings in the fuel receipt area. When the white permissive light is LIT on the bridge, then the trolley is aligned with the hatch centerline.
8.23.5 Restare the handrail.
8.24 Lower the cask.
8.24.1 Slowly lower the cask into the spent fuel pool while spraying the cask and lift beam with demineralized water to provide a film of clean water on the cask surfaces.
8.24.2 Continue lowering the cask until the Griff tape, placed nine (9) feet from the cask flange, is underwater. Nine feet from the cask flange is the minimum for flooding the cask, the cask may be lowered further if desired.
8.25 From Appendix A, Cask Loading Report, note the time of the independent boron samples A_NE record the time that the cask flooding begins. Verify both samples were drawn within four (4) hours of cask flooding.
8.26 Evaluate the need for special precautions based on the chemistry results from the grab sample.
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NoRTHEPN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 22 of 57 CAUTION: THE WATER / STEAM MIXTURE FROM THE VENT PORT HOSE MAY CONTAIN SOME RADIOACTIVE GAS. THE AREA DIRECTLY ABOVE WHERE THE HOSE IS DISCHARGING SHALL BE CLOSELY MONITORED TO DETERMINE IF THERE IS A RADIOLOGICAL HAZARD.
8.27 Fill Cask with Water 8.27.1 Attach a fill hose to the Hansen coupling in '.he drain port.
8.27.2 Attach the vent port adapter (Figure 14).
A. Record the temperature and pressure gauge calibration information in Section 1.0 of Appendix A, Cask Loading Report.
B. Position the vent port adapter ANR tighten the bolts.
C. Verify the sample vent is CLOSED.
D. Attach the hose to the vent port adapter AND arrange so that the adapter is not supporting the weight of the hose.
NOTE: The depth of the drain hose underwater directly affects the back pressure on the cask.
8.27.3 Route the drain hose underwater due to the possibility of steam being forced out of the cask AND secure to prevent whipping.
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TRLE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 23 of 57 CAUTION: - THE PRESSURE IN THE CASK COULD INCREASE RAPIDLY IF THE WATER BEGINS TO FLASH TO STEAM WHEN IT COMES IN CONTACT WITH THE FUEL.
MONITOR THE PRESSURE CAREFULLY AND DECREASE FLOW IF THE PRESSURE BEGINS TO RISE.
8.27.4 Slowly pump water from either pool (the 121 SFP is preferred if level is above yellow mark) into the cask through the drain port. Continuously monitor the temperature and pressure. lE pressure exceeds 10 psig or temperature exceeds 240 F, THEN stop pumping water into the cask until the temperature decreases to less than 215 F. Increase the flow if the pressure is stable.
CAUTION: THE VENT PORT ADAPTER MAY BE HOT.
8.27.5 After verifying that a steady stream of water is coming from the drain line by checking for bubbles or carefully lifting the hose out of the water, take a grab sample for chemistry analysis per RPIP 4105.
8.27.6 Continue pumping water into the cask until the temperature decreases to 190 F. Regulate the water flow to keep pressure s10 psig.
8.27.7 Stop the pump.
8.27.8 Pull the drain hose out of the water ANLQt verify no water flow indicating the cask is depressurized.
8.27.9 Remove the hose from the drain port AND the hose and vent port adapter from the vent port.
N 8.27.10 Apply two layers of Griff tape over the sealing surface and outer diameter of the vent and drain ports. DO NOT obstruct the vent port opening with Griff tape.
?
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE ' NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 24 of 57 8.28 Remove the remaining lid bolts AND store in the bolt storage box. l CAUTION:1 THERE IS SPENT FUEL IN THE r'ACKS IMMEDIATELY TO THE NORTH OF THE SAFE LOAD PATH. CARE MUST BE TAKEN TO MINIMlZE ANY CASK SWING WHEN MOVING THE CASK NORTH AND SOUTH TO ENSURE THE CASK DOES NOT PASS OVER OR IMPACT THE SPENT FUEL RACKS. USE BRIDGE JOG MOTIONS WHEN CASK IS IN
- THE SFP BELOW THE 755' LEVEL 4
8.29 Lower the cask and gently place it on the bottom of the pool. Make reference marks for the crane bridge and trolley position. l l 8.30 Evaluate the need for special precautions based on the chemistry results form the grab sample.
8.31 Release the lift beam from the cask trunnions per Appendix C, Lift Beam Operating Instructions.
8.32 Slowly raise the lift beam from the cask removing the cask lid. Closely monitor the removal of the cask lid, watching for any binding and/or kinked cables.
8.33 Rinse the lift beam and cask lid with clean water as they emerge from the pool.
8.34 E fuel is to be moved THEN raise the level in 121 Spent Fuel Pool per procedure C16, Spent Fuel Cooling System.
8.35 E fuel assemblies will be moved into the large pool, ItiFE remove the weir gate per:
W. O.
l 8.36 E fuel is to be offloaded, THEN remove the lid from the lift beam AND proceed to Step 8.38. E only the lid gasket is to be replaced, IHEN leave the lid attached to the lift beam A_NJ2 N continue with Step 8.37.
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PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TULE NUMBER:
TN-40 D
Section CASK UNLOADING PROCEDURE D95.2 REV: 2 Page 25 of 57 8.37 Cask Lid Metallic Gasket Replacement Instructions if greater than 2 gallons of acetone are brought in to clean NOTE: the gasket groove, a combustible source use permit must be issued.
8.37.1 Carefully remove all gasket retaining screws using a flat blade screwdriver AND remove the gasket.
8.37.2 Decon gasket groove and seal area with radiac wash.
8.37.3 Clean the gasket groove with acetone, wipe dry with a clean cloth AND visually inspect the gasket groove to ensure that the surfaces are free of scratches or imperfections.
The new gasket must be continuously and uniformly
- NOTE: supported while bringing it to the lid and during Installation.
N 8.37.4 Prepare the new gasket.
A. Using a 3/16" drill bit, drill new mounting holes for the lid gasket screws. The new holes should be offset a consistent length from the existing holes.
B. Locate the OP port, drain port and vent port passageways on the lid surface AND carefully drill 1/8" holes in the center of the metallic gasket corresponding to the locations of the port passageways.
C. Clean the new gasket with lint free clotm and acetone.
D. Inspect the gasket AND verify free of dents and scratches across the sealing surface.
8.37.5 Position the gasket in the groove. Assign sufficient personnel to hold the gasket so that the O-ring is not damaged during installation.
8.37.6 Reinstall the gasket retaining screws AMQ tighten using a flat blade screwdriver.
r
's PRAIRIE ELAND NUCLEAR CENERATIN3 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES j k TITLE NUMBER: j TN-40 D95.2 DT% CASK UNLOADING PROCEDURE REV: 2 Section '
Page 26 of 57 8.37.7 NA remaining steps A_ND proceed to D95.3, TN-40 Cask Removal and Storage Procedure.
8.38 Perform the following if fuel assemblies are to be offloaded.
8.38.1 Inspect the plastic on the top face protective cover for foreign material A_N_Q lower the cover into position using tag-lines (Figure 15). I 8.38.2 CLOSE all of the SFP doors, including the roof hatches.
I CAUTION; THE DRAIN LINE CONNECTION IS ABOUT 4" ABOVE THE TOP OF THE CASK BASKET. AS THE ASSEMBLIES ARE .
MOVED TO THE CASK, THE OPERATOR SHOULD AVOID l GOING DIRECTLY OVER THE DRAIN LINE CONNECTION.
8.38.3 Proceed with fuel offloading per procedure D5.1 and C17.
8.38.4 Document the Work Order number and fuel move numbers on Appendix A, Cask Loading Report.
8.38.5 Gently remove the top face protective cover by lifting with the tag lines and tying them off with the protective cover still in the SFP but away from the cask.
8.39 Write a separate Work Order to disposition the off loaded cask.
9.0 ATTACHMENTS 9.1 Table 1 - Required Tool 9.2 Figure 1 - TN-40 Cask 9.3 Figure 2 - TN-40 Cask Transporter 9.4 Figure 3 - TN-40 Cask Transporter 9.5 Figure 4 - Lift Beam 9.6 Figure 5 - Crane Hook Extension 9.7 Figure 6 - Lift Beam Air Controller
- r PRAIRIE ISLAND NUCLEAR C ENERATIN3 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
Section" CASK UNLOADING PROCEDURE REV: 2 Page 27 of 57 9.8 Figure 7 - Safe Load Path into and Out of the Transporter 9.9 Figure 8 - Bolt Torquing Order 9.10 Figure 9 - Bolt Torquing Order 9.11 Figure 10 - Ud Lifting Assembly 9.12 Figure 11 - Bottom Protective Cover 9.13 Figure 12 - Safe Load Path To and From the Decon Area 9.14 Figure 13 - Cask Orientation 9.15 Figure 14 - Cask Vent Port Adapter 9.16 Figure 15 - Top Face Protective Cover 9.17 Appendix A - Cask Loading Report 9.18 Appendix B - Transporter Operating Procedure 9.19 Appendix C - Lift Beam Operating instructions 9.20 Appendix D - Lifting Devices Visual Check
r PRAIRIE ISLAND NUCLEAR CENERATIN2 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
M W
TN-40 CASK UNLOADING PROCEDURE REV:
D95.2 2 -
Page 28 of 57 TABLE 1 - REQUIRED TOOLS Outside the Spent Fuel Pool Griff Tape Key, hex 3/4" Key, hex 7/8" Ratchet Screwdriver, flat blade Socket,1-5/16" deep (min. depth 2-3/8")
Socket, hex 2-1/4" Socket, hex 1-7/8" Rope for taglines
~
Inside the Spent Fuel Pool Pump Socket,1-5/16" deep (min. depth 2-3/8")
Ratchet l
1 l
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o PRAIRIE ISLAND NUCLEAR GENERATING PLANT NCRTHERN STATES POWER COMPANY MAINTENAtlCE PROCFDURES TITLE NUMBER:
TN-40 D95.2 D
Section CASK UNLOADING PROCEDURE REV: 2 Page 29 of 57 i FIGURE 1 -TN-40 CASK i
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l TN-@ D95.2 E# CASK UNLOADING PROCEDURE REV: 2 Page 30 of 57 FIGURE 2 -TN-40 CASK TRANSPORTER Cask Heistl Cask links o
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TN-@ D95.2 D "
CASK UNLOADING PROCEDURE REV: 2 Page 31 of 57 FIGURE 3 -TN-40 CASK TRANSPORTER
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PRAIRIE CLAND NUCLEAR CENERATIN3 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TULE NUMBER:
TN-40 D95.2 D
s.ction CASK UNLOADING PROCEDURE REV: 2 Page 32 of 57 FIGURE 4 - LIFT BEAM O
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TN-40 CASK UNLOADING PROCEDURE D95.2 REV: 2 Section '.
Page 33 of 57 FIGURE 5 - CRANE HOOK EXTENSION
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. i PRAIRIE ISLAND NUCLEAR CENERATIN3 PLANT NORTHERN STATES POWER COMPANY
_ MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
SEctiort CASK UNLOADING PROCEDURE REV: 2 Page 34 of 57 FIGURE 6-LIFT BEAM AIR CONTROLLER l
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l PRAIRIE ISLAND NUCLEAR CENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
Section CASK UNLOADING PROCEDURE REV: 2 Page 35 of 57 FIGURE 7 -SAFE LOAD PATH INTO AND OUT OF THE TRANSPORTER I .I .I 1 I I l l
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PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES i TRLE NUMBER:
TN-40 D95.2 D " -
CASK UNLOADING PROCEDURE REV: 2 Page 36 of 57 FIGURE 8 - BOLT TORQUING ORDER i l l
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TN-40 D95.2 :
D "
CASK UNLOADING PROCEDURE REV: 2 Page 37 of 57 FIGURE 9 - BOLT TORQUING ORDER 160'
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. . i PRAIRIE ELAND NUCLEAR CENERATIN3 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES i TITLE NUMBER: l TN-40 D95.2 D "'
CASK UNLOADING PROCEDURE REV: 2 Page 38 of 57 l FIGURE 10-LID LIFTING ASSEMBLY l
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PRAIRIE ISLAND NUCLEAR CENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES ;
TITLE NUMBER: l TN-@ D95.2 D "
CASK UNLOADING PROCEDURE REV: 2 l
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Page 39 of 57 FIGURE 11 - BOTTOM PROTECTIVE COVER i 1
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- s PRAIRIE l' LAND NUCLEAR CENERATIN3 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
Section CASK UNLOADING PROCEDURE REV: 2 l
Page 40 of 57 FIGURE 12 -SAFE LOAD PATH TO AND FROMTHE DECON AREA l k
NORTH 9e 8 20'-0* . 35'. P "
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PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
Section CASK UNLOADING PROCEDURE REV: 2 Page 41 of 57 FIGURE 12 - SAFE LOAD PATH TO AND FROM THE DECON AREA (Continued) i i l l-l l
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PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TRLE NUMBER:
TN-40 D95.2 D
Section -
CASK UNLOADING PROCEDURE REV: 2 Page 43 of 57 FIGURE 14 - CASK VENT PORT ADAPTER THERMCMETER
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FOR lf*NPT
@h 3 \ BOLTS TO BE 2'x M' - 10 UNC
/ A490 (4-RE0'0). APPLY NEVER-SEIZE TC THREADS PRIOR TO BOLTING. TICHTEN BOLTS EVENLY (WRENCH TICHT ONLY).
0-R[NG TO BE PARKER SEALS 2-425-E540-80 OR EDU! VALENT.
(CAUTION: ASSEMBLY MAY BECOME HOT DURING USE.)
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
Section CASK UNLOADING PROCEDURE REV: 2 Page 44 of 57 )
FIGURE 15 -TOP FACE PROTECTIVE COVER 1 1 0 l
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PRAIRIE ISLAND NUCLEAR GENERATfNG PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TRLE NUMBER:
TN-40 D95.2 D "'
CASK UNLOADING PROCEDURE REV: 2 Page 45 of 57 Page 1 of 1 APPENDIX A - CASK LOADING REPORT ltems with an asterisk are ISFSI Tech Spec acceptance
- NOTE: criteria, if these criteria cannot be met, an evaluation SHALL be made of the applicable data.
1.0 SPENT FUEL POOL PARAMETERS 1.1 initial boron concentration ppm Chemist Sample Date/ Time
- 1.2 Boron concentration prior to flooding the cask verified > 2280 ppm.
ppm Chemist #1 Sample Date/ Time ppm Chemist #2 Sample Date/ Time 1.3 Time cask placed in the water.
Date Time initial 1.4 Vent port adapter calibration information Temperature gauge No. Cat Date Pressure gauge No. Cal Date 2.0 FUEL UNLOADING 2.1 Fuel unloaded YES NO (If NO, this section will be N/A) 2.2 Fuel Move Work Order Number 2.3 Fuel Transfer Log Move Numbers to Nuc Eng I
. . _- . ~ . - - - . - . . . .. . . . . . . . . - _ -- . .~ _ . - . _ - _ - . - _
PRAIRIE ISLAND NUCLEAR GENERATING PLANT '
NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2
~
CASK UNLOADING PROCEDURE REV: 2 ;
sesion '
Page 46 of 57 I Page 1 of 6 l APPENDIX B - TRANSPORTER OPERATING PROCEDURE PRECAUTIONS Warning lights for PARKING BRAKE SET and REAR TURNTABLES LOCKED will not function after i disconnecting power from the unit. Visually check the i state of these items.
The parking brakes are to be used only when the transporter is completely stopped, and must be
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disengaged before any motion. If the parking brakes are
' NOTE'.- .
engaged while the transporter is in motion, severe damage tc the brake components will result. The emergency
, brake la to be used while the transporter is in motion (Section 5.0).
The pressure in the system as indicated on the brake ;
pressure gauge must be in the green band (above 3
1900 psi) before traveling. A loss of pressure while in I motion may cause the parking brakes to engage, resulting '
in severe damage to the brake components.
DO NOT use Jack assemblies on loose or soft ground.
NOTE'. .: -
Figures 2 and 3 provide identification and location of many 4
of the transporter components.
1.0 TRANSPORTER STARTUP l 1.1 Verify the transporter is plugged into the welding receptacle, if not perform the following:
1.1.1 Verify that the 30 Amp circuit breaker in J-BOX 3 is in the "OFF" position.
1.1.2 Connect one end of the power cable to the connector on the right jack assembly.
1.1.3 Connect the other end of the power cable into the designated welding receptacle.
1.1.4 Turn the 30 Amp circuit breaker in J-BOX 3 to the "ON" position.
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D CASK UNLOADING PROCEDURE REV: 2 Page 47 of 57 Page 2 of 6 el APPENDIX B - TRANSPORTER OPERATING PROCEDURES [ CONTINUED) 1.2 Start the hydraulic power unit using the button on the Control Pendant. If the ambient temperature is below 32 F, allow the power unit to run until the reservoir temperature is above 50'F before operating the transporter.
2.0 TOW VEHICLE FROCEDURES
. 2.1 Connecting t_he Tow Vehicle 2.1.1 StartLp the transporter (Section 1.0).
1 2.1.2 Set the transporter parking brakes. '
2.1.3 Align the tow vehicle with the centerline of the transporter.
2.1.4 Back up the tow vehicle until the hitch tongue can be lowered onto the tow l vehicle hitch.
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2.1.5 Lower the hitch tongue onto the tow vehicle hitch ANQ secure the tow vehicle i hitch mechanism CLOSED. ;
2.1.6 Connect the 12VDC power cord between the transporter and the tow vehicle.
2.1.7 Unlock the front steering of the transporter by using the Control Pendant.
2.1.8 Release the transporter parking brakes.
2.1.9 If desired, shutdown the transporter and prepare for travel (Section 4.0).
2.2 Disconr.9cting the Tow Vehicle 2.2.1 Position the transporter with the hitch tongue parallel to the long axis of the transporter.
2.2.2 Startup the transporter (Section 1.0).
2.2.3 Set the transporter parking brakes.
2.2.4 Disconnect the 12VDC power cord from between the tow vehicle and the transporter.
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-@ D95.2 D
Section CASK UNLOADING PROCEDURE REV: 2 Page 48 of 57 Page 3 of 6 i
APPENDIX B - TRANSPORTER OPERATING PROCEDURES [ CONTINUED]
2.2.5 Unlock the tow vehicle hitch mechanism.
2.2.6 Use the Control Pendant to raise the hitch tongue to the fully disengaged position.
2.2.7 The transporter can either be shutdown (Section 4.0 ) OB is ready for use.
3.0 TOW DOLLY PROCEDURES 3.1 Connecting the Tow Dolly 3.1.1 Align the tongue of the transporter with the transporter centerline using the tow vehicle.
3.1.2 Startup the transporter (Section 1.0).
4 3.1.3 Lock the steering of the transporter using the Control Pendant.
3.1.4 Set the transporter parking brakes.
3.1.5 Disconnect the tow vehicle from the transporter AtLQ connect the tow dolly to the tow vehicle. Lock the tow dolly steering with pin provided.
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3.1.6 Raise the transporter using both right and left . LACK EXTEND pushbuttons simultaneously. Raise the transporter to the full extent of the jacks.
3.1.7 Using the tow vehicle, position the tow dolly under the transporter so that the sockets of the upper tow dolly frame are below the engaging blocks on the transporter frame.
3.1.8 Lower the transporter onto the tow dolly, adjusting the upper frame as required to engage the transporter blocks in the tow dolly sockets.
CAUTION: - THE TOW DOLLY WILL LIFT OFF ITS TONGUE CASTER AS THE TRANSPORTER IS LOWERED.
3.1.9 Unlock the tow dolly steering by removing the pin from the turntable of the tow dolly.
PRAIRIE CLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
Section CASK UNLOADING PROCEDURE REv: 2 Page 49 of 57 Page 4 of 6 APPENDIX B - TRANSPORTER OPERATING PROCEDURES [ CONTINUED]
3.1.10 Put pins in upper ears when aligned to the transporter.
3.1.11 Continue retracting both jacks until they are in the stown position (completely i retracted). I l
3.1.12 Shutdown the transporter in preparction for travel (Section 4.0).
3.2 Djsconnect the Tow Dolly i
3.2.1 Startup the transporter (Section 1.0).
4
- 3.2.2 Hitch the tow dolly to the tow vehicle.
3.2.3 Set the transporter parking brakes.
3.2.4 Slowly raise the transporter using both JACK EXTEND pushbuttons to remove pins from upper ears. Use one of the pins to lock the tow dolly steering.
3.2.5 Raise the transporter clear of the tow dolly by using both the left and right JACK EXTEND pushbuttons simultaneously.
i 3.2.6 Use the tow vehicle to park the tow dolly.
3.2.7 Lower the transporter to the ground by retracting both Jacks until they are in the stowed position (completely retracted).
3.2.8 Reconnect the tow vehicle to the front hitch of the transporter.
3.2.9 Unlock the front steering of the transporter from the remote pendant.
3.2.10 Release the transporter parking brakes.
3.2.11 if desired, shutdown the transporter and prepare for travel (Section 4.0).
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D CASK UNLOADING PROCEDURE REV: 2 Page 50 of 57 Page 5 of 6 APPENDIX B -TRANSPORTER OPERATING PROCEDURES [ CONTINUED]
4.0 IBANSPORTER SHUTDOWN 4.1 Deactivate Hydraulic Power Unit 4.1.1 Retract all hydraulic systems to their home position or the appropriate position for travel.
4.1.2 Manually verify the position of all vehicle components.
4.1.3 Ensure that the system pressure is at the correct level by checking the gauge on the left jack assembly. The pressure must be in the green zone (above 1900 psig).
4.1.4 Turn OFF the power unit at the Control Pendant.
4.2 The transporter will ordinarily be stored with the electrical cord connected. IE the transporter is to be stored unplugged or is being prepared for travel, THEN perform the following:
4.2.1 Verify that all the systems requiring power are in the " READY FOR TRAVEL" i position.
4.2.2 Turn the 30 Amp circuit breaker in J-BOX 3 to the "OFF" position.
4.2.3 Detach the power cord from the welding receptacle.
1 4.2.4 Remove the other end of the cord from the connector on the right jack assembly.
4.2.5 Coil the cord AND return it to the storage area on the transporter.
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PRAIRIE ISLAND NUCLEAR CENERATIN2 PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TULE NUMBER:
TN-40 D95.2 D
Section CASK UNLOADING PROCEDURE REV: 2 l Page 51 of 57 j Page 6 of 6 l l
APPENDIX B -TRANSPORTER OPERATING PROCEDURES [ CONTINUED]
5.0 EMERGENCY CASK LOWERING In the event that the cask must be lowered when the transporter is not able to power up to !
complete a full unloading procedure, the cask can be lowered to the ground by using the following procedure. Once the cask is on the ground, the transporter will be unable to move without completely unloading the cask. It will be necessary to bring a portable 460VAC generator to the transporter in order to move it again.
5.1 If possible, move the transporter to level ground.
5.2 Set the parking brakes AND chock the wheels if on a grade.
j IF the Lower Cask Restraints cannot be removed, the cask NOTE: can still be lowered but it will not lower straight down. l This may make reloading difficult.
5.3 Remove the Lower Cask Restraints from the cask.
5.4 Release the pressure to the cask lift from the valve on top of the power unit. The lift is ;
valve No. 9. I 5.5 Allow the cask to lower to the ground.
PRAIRIE ISLAND NUCLEAR CENERATIN3 PLANT !
NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
D95.2 D'
Section TN-40 CASK UNLOADING PROCEDURE REV: 2 Page 52 of 57 Page1 of 4
' NOTE: Figures 4,5,6 and 10 provide details for this Appendix.
APPENDIX C - LIFT BEAM OPERATING INSTRUCTIONS 1.0 ATTACHING THE LIFT BEAM TO THE AUXILIARY BUILDING CRANE, 1.1 Required Equipment e Ratchet e 3/4" socket 1.2 Remove the crane hook extension keeper plate.
1.3 Remove the 6-7/8" lift pin from the crane hook extension.
4 1.4 Lower the crane hook between the vertical plates of the crane hook extension AND align the holes with the crane hook eye.
1.5 Insert the pin through the vertical plates.
1.6 Install the keeper plate AN_Q tighten the bolts.
1.7 Remove the keeper plate of the lift beam.
1.8 Remove the 6-7/8" lift pin from the lift beam.
1.9 Lower the crane hook extension between the horizontal plates of the lift beam ANQ align the holes with the crane hook eye.
1.10 Insert the pin through the vertical plates.
1.11 Install the keeper plate AND tighten the bolts.
2.0 CONRECTING THE AIR SUPPLY 2.1 Connect the air controller to an air supply of 75-125 psig.
2.2 Estimate the mavimum distance that the air controller will be from the air supply during the intended operation to determine the appropriate number of air hose sections required.
PRAIRIE ISLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TRLE NUMBER:
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CASK UNLOADING PROCEDURE REV: 2
) Page 53 of 57 Page 2 of 4 APPENDIX C - LIFT BEAM OPERATING INSTRUCTIONS [ CONTINUED]
It may be necessary to disconnect the flexible hose from the ilft beam during certain out-of-pool operations. Be
- NOTE: certain the hose connections are fully seated. A distinct click can be heard when the quick connectors are properly engaged.
2.3 Attach the section(s) of the lift beam hose to the three quick connectors on the air controller. The hoses and quick connectors are color-coded to assure proper connection (Figure 9).
2.4 Connect the three hoses to the fittings on the right hand side of the beam as one faces the side with the piping. The hoses, piping and air controller are color coded.
2.5 Verify that both bypass toggle va!ves located on the beam are in the " CLOSED" position (Figure 9).
2.6 Verify the red handle of the locking cylinder valve on the air controller is in the " LOCK" position.
2.7 Depress the black handled toggle valve labeled " Flow Reset" on the air controller until a pressure of at least 75 psig is indicated on the pressure gauge. Release the toggle to close this valve AN_D Q activate the automatic cut off valve in the air controller. This valve is designed to cut off the air supply to the system if a leak develops in the hoses, piping or connections.
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PRAIRIE tOLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D "
CASK UNLOADING PROCEDURE REV: 2 Page 54 of 57 Page 3 of 4 APPENDIX C - LIFT BEAM OPERATING INSTRUCTIONS [ CONTINUED]
3.0 MOVING THE LIFT BEAM ARMS TO " RELEASE" CAUTION:7 DO NOT ATTEMPT TO MOVE THE ARMS WHEN THE RED HANDLE IS ON " LOCK" OR THE AIRLINES ARE DISCONNECTED. HOWEVER,IF THIS SHOULD HAPPEN, RETURN THE ARM POSITIONING LEVER TO THE POSITION CORRESPONDING WITH THE CURRENT POSITION OF THE ARMS ON THE BEAM BEFORE MOVING THE RED HANDLED LOCKING CYLINDER VALVE TO " UNLOCK".
When the system is in the " LOCK" position, visual confirmation la provided by small metal flags which ar6 mounted on one side of the lift beam. The flags extend horizontally over the lock pins when the pins are fully extended through the lock plate. They can be seen from the surface of the pool when the cask is under water.
% ten changing the lift arm position, wait until the pressure gauge indicates line pressure after moving the red handled valve to the " UNLOCK" position. Then reposition the arms to the desired position. The arm repositioning will take longer if the air lines are especially long or if the air pressure is on the low side.
3.1 Set the red handled locking cylinder valve to " UNLOCK".
3.2 Move the arm positioning lever to the " RELEASE" position.
3.3 Visually verify that the arms have moved fully to the" RELEASE" position.
3.4 Set the red handled locking cylinder valve to " LOCK".
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,. a PRAIRIE ISLAND NUCLEAR GENE.";ATING PLANT NORTHERN STATES POWF.". COMPANY MAINTENANCE PROCEDURES h
.{h ' TITLE NUMBER:
TN-40 D95.2 D4
- l. - .
CASK UNLOADING PROCEDURE REv: 2
^ Sectio'ni -
4 Page 55 of 57 Page 4 of 4 APPENDIX C - LIFT BEAM OPERATING INSTRUCTIONS [ CONTINUED]
4.0 MOVING THE LIFT BEAM ARMS TO " ENGAGE" 4
~ CAUTION:': DO NOT ATTEMPT TO MOVE THE ARMS WHEN THE RED HANDLE IS ON " LOCK" OR THE AIRLINES ARE l DISCONNECTED. HOWEVER,IF THIS SHOULD HAPPEN, l l RETURN THE ARM POSITIONING LEVER TO THE j POSITION CORRESPONDING WITH THE CURRENT !
POSITION OF THE ARMS ON THE BEAM BEFORE MOVING THE RED HANDLED LOCKING CYLINDER VALVE TO " UNLOCK".
When the system is in the " LOCK" position, visual
! confirmation is provided by small metal flags which are i mounted on one side of the lift beam. The flags extend l horizontally over the lock pins when the pine are fully I extended through the lock plate. They can t.e seen from the surface of the pool when the cask is under water.
. NOTE:'
When changing the lift arm position, wait until the ,
pressure gauge Indicates line pressure after moving the !
i* red handled valve to the " UNLOCK" position. Then .
reposition the arms to the desired position. The arm l repositioning will take longer if the air lines are especially long or if the air pressure is on the low side. i 4.1 Set the red handled locking cylinder valve to " UNLOCK". l 4.2 Move the lifting arms positioning lever on the air controller to the " ENGAGE" position.
4.3 Visually verify that the lift arms are positioned properly on the lifting shoulders and there is no binding.
4.4 Set the red handled locking cylinder valve to " LOCK".
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s ,. n PRAIRIE CLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D
section '
CASK UNLOADING PROCEDURE REV: 2 Page 56 of 57 Page 1 of 2 APPENDIX D - LIFTING DEVICES VISUAL CHECK 1.0 LIFTING BEAM VISUAL INSPECTION NOTE: , Figures 4 and 5 should be used as references.
1.1 Verify no damage or deformation to the:
1.1.1 Lift arms 1.1.2 Air cylinders 1.1.3 Connecting hardware 1.1.4 Crane hook extension 1.2 Verify no dirt or grit on the bearing surfaces.
1.3 Verify that the locking pins are in place.
L NOTE: If r8 Painting la required, a work order should be lasued to repair and repaint area.
1.4 Verify no chipped, cracked or peeling paint.
1.5 Document any discrepancies in Section 3.0 and indicate if the issue i has been resolved.
1 2.0 LID LIFTING SLING ASSEMBLY HEAVY LOADS INSPECTION Visually inspect the lid lifting sling assembly (Figure 10). Conditions for replacement are as follows (list is from D58):
2.1 Six randomly distributed broken wires in one rope lay, or three broken wires in one strand in one rope lay.
2.2 Wear or scraping of one-third the original diameter of outside individual wires.
2.3 Kinking, crushing, bird-caging or any other damage resulting in distortion of the rope structure.
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$ ,, e PRAIRIE CLAND NUCLEAR GENERATING PLANT NORTHERN STATES POWER COMPANY MAINTENANCE PROCEDURES TITLE NUMBER:
TN-40 D95.2 D "~
CASK UNLOADING PROCEDURE REV: 2 Page 57 of 57 Page 2 of 2 APPENDIX D - LIFTING DEVICES VISUAL AND FUNCTION CHECK [ CONTINUED]
2.4 Evidence of heat damage.
2.5 IE the paint on the hook has cracked or shows other signs of deformation, THEN the throat opening SHALL NOT be > 15% more than the normal throat opening OR twisted by more than 10 degrees from the plane of the unbent hook. (The hook is a Crosby 319-A, NA hook with a normal throat opening of 3.38 inches. ) ,
2.6 Corrosion of the rope or end attachments.
3.0 OisSERVATIONS
.