ML20210G777
| ML20210G777 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 05/12/1986 |
| From: | Cosgrove M, Hunt G, Stone B DETROIT EDISON CO. |
| To: | |
| Shared Package | |
| ML20210G731 | List: |
| References | |
| FOIA-86-508 35.000.83, NUDOCS 8609250469 | |
| Download: ML20210G777 (29) | |
Text
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4 FEPM] 2 PROCEDURE - MAINTENANCE , ,
TITLE: REACTOR VESSEL HEAD REMOVAL AND INSTALLATION a '.. ,,i t i' ' ' f-[ f'j iI PROCE hRE NUMBER: 35.000.83 '
REVISION: 5 $-
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SAFETY CbSSIFICATION: SR
.Carv Hunt Name of preparer M P. Coserrae /s/ Date 05/12/86 Administrative Format Reviewer B. 3.IS$re l's / Date 05/12/86 Technical Reviewer (s)
Date Date 3 ',s , s W.E.M.*jleyhy/ Date 05/12/86 Supervisor, OA
'[ __G.ahthirter_ls1 Date 05/12/86 Resp Section Head or OSRO y Member / Alternate Further Approval Requitec' for SR or SP Procedures:
N _E,s. lena_rt /s/ Date 05/12/86 O'RO Chairman or Alternate 1 R. S. I.ena r t /s/ Date 05/12/86 Plant Manager
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. The following approved Procedure Change Requests are incorporated in this revision:
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., T3808 TNs revision lldoes l)(does not constitute periodic review.
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3 Rey 41an Summary '
, ~WAtli THROUGH SIGNATURES:
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R. Eberhardt /s/ 05/12/86
- , G. Ohlerud.her /s/ , 05/12/86
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i POM 35.000.83 Revision 5 Page 2 TABLE OF CONTF. HTS 8.agg 1.0 Furpose.......................,................ 3 2.0 Equipment Locatien. ........................... 3 3.0 References..................................... 3 4.0 Required Equipment............................. 4 5.0 Pr ec ent i?ns and Limi t a t ions . . . . . . . . . . . . . . . . . . . . 5 6.0 Prerequisites.................................. 7 7.0 Proceiures..................................... 9 7.1 Preparation to Remove The R* actor Vessel Head............................... 9 I 7.2 Reactor Vesse) Head Removal............... 11 7.3 Cleaning and Preparation of Vessel Head Se aling Sur f ace s and "O" Rings . . . . . . . . . . . . 13 7.4 Reactor Vessel Head Installation.......... 15 7.5 Restoration............................... 18 Enclosures -
Head Strongback and Attachments (083085)............. Enclosure 1 Head Holding Ped es t al (083085) . . . . . . . . . . . . . . . . . . . . . . . Enclosure 2 Attachments i
Ve s sel He ad Removal (051286) . . . . . . . . . . . . . . . . . . . . . . . . . At t achment 1 Cleaning and Preparation of Vessel Head Sealing g d
Sur f ac e s and "O" Rings ( 0 5128 6 ) . . . . . . . . . . . . . . . . . . . . . . A t t achme nt 2 Ves sel He ad Ins t allat ion (051286) . . . . . . . . . . . . . . . . . . . .At t achment 3 t
100/R54/3.0 051986 s
s- POM 35.000.83 Revision 5 Page 3 1.0 PURPOSE The purpose of this procedure is to provide detailed instructions for the removal and installation of the Reactor Vessel Head. This procedure will generally be performed in the sequence outlined in the Refueling Sequence Procedure, Reference 3.8.
This procedure addresses the concerns of License Comunitments 2245, z 2246, 2971, 2972 and 6964 listed in Reference 3.20. 7 1
2.0 EQUlPMENT LOCATION The Reactor Vessel Head is installed at the top of the Reactor Vessel during normal plant operation. During refueling outage activities the Head will normally be stored over the cask washdown area as shown on the Reactor Euilding 5th floor laydown space drawing, Reference 3.15.
The Head Strongback may be stored on or of f the Reactor Building 5th floor as determined appropriate by the Nuclear Shif t Supervisor and Fuel Handling Supervisor.
3.0 REFERENCES
3.1 Plant Operations Manual (POM) Procedure 12.000.15, PN-21 (Work Orderi Proces sir.g 3.2 POM Procedure 31.000.04, Control of Calibrated Maintenance Test Equipment 3.3 POM Procedure: 31.000.02, Maintenance itecord System 3.4 DELETED 5
- 3.5 POM Procedure 12.000.46, Refueling Floor conduct of Operations (as applicable) 3.6 POM Procedure 32.000.12, Requirenents For Operation of Cranes, Hoists and Lifting Devices
- 3.7 POM Procedure 32.000.07, Reactor Building Crane Operation
- 3.8 POM Procedure 32.000.09 Refueling Sequence 3.9 F10-00 Fermi II Heavy Load Rigging Manual 3.10 EF2-67,211, EF2-60,134, EF2-57,432, Control of Heavy Loads 3.11 Reactor Assembly and Servicing Equipment, CEK 45708
- Denotes "Une" Reference s
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. POM 35.000.83
,. R1 vision 5 Page 4 3.12 Fermi II Reactor Vessel Manual, B1101 A00lJA002 3.13 BWR Servicing and Refueling Improvement Program - Phase I Summary Report NEDG - 21860 Class I C00-4174-1 September 1978 3.14 Fermi 2 Power Plant Approved / Controlled Materials List, NE-84-0344
- 3.15 DECO Dwg 6C721-4858, Reactor Building Laydown Space-5th Floor f 3.16 NUREC 0612, Control of Heavy Loads at Nuclear Power Plants
- 3.17 DECO File Dwg RI-51, closure Head Final Machining
- 3.18 DECO File Dwg R1-163, Miscellaneous Details - 251 "I.D.'BWR
- 3.19 DECO File Dwg RI-229, closure Head Nozzle Details - 251" I.D. BWR 3.20 License commitments 2245, 2246, 2971, 2972 and 6964
- 3.21 DECc Dwg 6C721-2802, Reactor Pressure Vessel Head and Head Strongback Safeload Path 4.0 REQUIRED EQUIPMENT 4.1 Estimate of minimum tools, equipment , materials and manpower is as follows:
4.1.1 Reactor Pressure Vessel Head Removal
- 1. Manpower (3 to 5 hrs duration) -
- a. One rigger
- b. One crane operator
- c. One supervisor
- d. Four mechanics l
- e. One Health Phsyics representative
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- 2. Special Tools i
- a. Flange protector
- b. Head strongback
- c. Stud protectors and alignment sleeves
- De otes "Use" Reference A 3
POM 35.000.83 Revision 5 Page 5
- 3. Materials
- n. Vessel Head "O" rings Inner: 480-9092 Outer: 480-9093 4.1.2 Cleaning and Preparation of Vessel Head Sealing Surfaces and "O" Rings
- 1. Manpower (2 hrs each)
- a. Four mechanics
- b. One supervisor
- 2. Special Tools
- a. Retainer ring pliers 4.1.3 Reactor Pressure Vessel Head Installation
- 1. Manpower (7 hrs duration)
- a. One rigger
- b. One crane operator
- c. One supervisor
- d. Four. mechanics
- c. One Health Physics representative
- 2. Special Tcols
- a. Head Strongback
- b. Stud protectors and alignment sleeves 4.2 Measuring and test equipment used in performing this procedure will be recorded on Attachment 1, 2 or 3 (as applicable). [
5.0 PRECAUTIONS AND LIMITATIONS 5.1 Observe the material and personnel accountability and control requirements of Refueling Floor Conduct of Operations , Reference 3.5. b T
POM 35.000,83 Revision 5 i Page 6 I 5.2 Establish a designated storage area for parts removed duririg disassembly. Tag parts removed to ensure proper reinstallation. ~~
Document the storage area in the remarks sect ion of Attachment 1, 2 or 3 (as applicable).
5.3 The following material, or approved equivalent will be used in the performance of this procedure.
5.3.1 Acetone 5.3.2 New or redistilled Isopropyl or Methyl alcohol 5.3.3 Soft cotton cloth 5.3.4 Power or hand wire brush as appropriate 5.4 The sealing surfaces of the Reactor Vessel and Reactor Vessel Head must be protected from scratches, indentations, and corrosive substances.
5.5 Examine sealing surfaces of the Reactor Vessel and Reactor Vessel Head for scratches, ind ent a t ions , pitting or etching prior to installation of new "0" rings, and reassembly of the closure head on the vessel.
5.6 For the Reactor Vessel Head movement, ensure no obstacles are in the path of head movement. Observe the safe load path and lif t height shown on Reference 3.21. Although the maximum lif t height .
is listed as " unlimited ," restrict the lift height to the minimum required to safely complete the movement of the vessel head.
5.7 The Reactor Vessel Head and associated component s are subject to
. radioactive contamination. Radiation monitoring 'and protective measures shall be used to minimize exposure and avoid contamination of personnel and surroundings in accordance with the applicable Radiation Work Permit.
5.8 All maintenance and operations involved with the Reactor Vessel and it s components shall be accomplished in strict compliance with approved procedures.
5.9 No welding, burning, chipping or grinding shall be allowed on the Reactor Vessel or Closure Head. In performing any welding near the vessel, use extreme care that NO ARC STRIKIS are made on the vessel or clo ure head.
5.10 Due to the size, weight, and nature of the Reactor Vessel Head ,
care must be exercised to prevent inadvertent injury to personnel, or damage to Reactor internals or equipment , whenever lif ting or transporting the head .
s 1
POM 35.000.83
- Revision 5 Page 7 5.11 Observe head and strongback/ turnbuckle match markings (as applicable). Additionally, every time the Vessel Head is lif ted ,
the load distribution at the four lif ting paint s should be visually checked to ensure that the turnbuckles are properly -
adjusted and that the head lifts squarely. An unequal load could result in personnel injury and/or severe equipment damage.
5.12 Vacuum ventilation of the Vessel Head is performed concurrently with portions of this procedure, during head removal. Vacuum ventilation of the head may be secured at any time the desired reduction in concentrations of hydrogen and radioactive gases are met, but must be completed prior to step 7.2.4.
Coordinate with the Nuclear Shif t Supervisor and Health Physics to secure vacuum ventilation of the Vessel Head.
5.13 Reactor Building Crane operation shall be in accordance with
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Reference 3.7.
5.14 Verify all shackles are securely fastened prior to each lif t.
5.15 Due to contamination levels of the. Reactor Vessel Head, the head should be wrapped in a suitable plastic material or otherwise contained for interim storage af ter removal as directed by Health Physics.
5.16 Ensure Health Physics personnel are notified and present to
- perform any nacessary surveys, prior to lif ting the Reactor vessel Head away from the Reactor Vessel flange.
5.17 Prior to commencing Vessel Head or flange cleaning and/or "0"-ring inspection and replacement, obtain H.ealth Physics approval. Special Radiation Work Permits may be required to 1 perform certain steps for vessel head cleaning and preparation h covered in Section 7.3, as designated by Health Physics.
6.0 PREREQUISITES 6.1 A PN-21 (Work Order) shall be processed and shall be released by the Nuclear Shift Supervisor in accordance with Reference 3.1 prior to the performance of this procedure.
6.2 Personnel performing this procedure shall be briefed on any item deemed necessary to minimize job time, radiation exposure and spread of contamination. These considerations should include ensuring that:
6.2.1 All required refueling floor radiation monitoring and alarm systems are in operation.
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POM 35.000.83 Revision 5
. Page 9
. 7,0 PROCEDURE NOTE: Should any question or conflict arise in performance of this procedure, hold work at a safe point and inform the main-tenance foreman in charge immediately no a resolution can be obtained.
NOTE: Approximate weights of components handled are:
Reactor Pressure Vessel Head - 39 Ton.
Reactor Pressure Vessel head Strongback - 5 Ton CAUTION Vacuum ventilation of the Reactor Vessel Head is performed concurrently with portions of this procedure during head removal. Vacuum ventilation of the head may be secured at-any time the desired reduction in concentrations of hydrogen and radioactive gases are met, but must be completed prior to step 7.2.4 Coordinate with the Nuclear Shift Supervisor and Health Physics to secure vacuum ventilation of the Vessel Head.
l 7.1 Preparation to Remove The Reactor Vessel Head NOTE: The Head Strongback, shown in Enclosure 1, is a special lif ting device provided to facilitate handling of the Rea: tor Vessel Head. The top centerplate.of the strongback has a slot sized to accommodate the main hook (duplex hook) of the Reactor Building Overhead Crane. Two hook pins inserted through the holes in the strongback secure the crane hook in position.
The strongback is fitted with a set of turnbuckles and anchor shackles which connect to the lifting lugs on the Reactor Vessel Head for lif ting. When stored, the turnbuckles are placed in a horizon'tal position on their support brackets.
NOTE: Refer to Enclosure 1.
7.1.1 Connect the Main Crane Hook to the Head Strongback
- 1. Verify that the two centerplate hook pins on the Head Strongback are retracted onto the pin supports.
- 2. Position and lower the main crane hook into the strongback hook box.
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, PON 35.000.83 I Rsvision 5 Page 10 t
- 3. Locate the semi-circular groove in each hook pin so that it is facing downward . ,_,
4.
Using the pin insertion tool (or similar device),
push one of the hook pins through the hook box. h Secure locking pin through the opening in the end of the hook pin to secure the hook pin in place.
- 5. Insert the second hook pin in the same manner and secure with locking pin. [
- 6. Adjust crane hook until it seats securely into the recesses in the hook pins. Document on Attachment 1.
NOTE: Steps 7.1.2 and 7.1.3 may be performed concurrently.
7.1.2 Connect the Head Strongback to the Vessel Head
- 1. Lift and reposition the Strongback as necessary to allow turnbuckle adjustment. At each of the four lif ting arms on the Strongback, move the Vessel Head Turnbuckle Assemblies from the stowed position to the lifting (downward hanging) posi-
! tion (as applicable).
CAUTION
. Do not traverse over the spent fuel pool while transporting the Head Strongback..
- 2. Using the Reactor Building Main Crane, carefully lift and position the Head Strongback over the Vessel Head.
NOTE: Observe head and Strongback/ turnbuckle match markings (as applicable). [
l 3. Carefully lower the Head Strongback and manually i- align the lif ting arms and turnbuckles with the
! lugs on the Vessel Head. See Enclosure 1.
l
- 4. With the lif ting arms and turnbuckles properly positioned, attach the four shackles to the Vessel Head Lugs. Visually verify that all four turnbuckles are properly adjusted to equally share the load so that the Reactor Head will lif t i squarely. Document on Attachment 1.
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FOM 35.000.83
- Revision 5 Page 11 7.1.3 Coordinate with Operations and I&C as necessary to
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provide a suitable method of monitoring flange temperatures prior to the removal of the Reactor Head thermocouples.
7.1.4 Verify the vessel head is free for removal and if possible, make arrangements and set the vess'ei head replacement "O" rings inside the pedestals prior to removal of the head. Document on Attachment 1.
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7.2 Reactor Vessel Head Removal CAUTION Observe the safe load path of Reference 3.21 for the Reactor Vessel Head movement. Ensure no obstacles are in the path of head novement. Although the maximum lift height is listed as " unlimited ,"
f restrict the lift height to the minimum required to ssfely complete movement of the vessel head.
CAUTION
-Coordinate Vacuum Ventilation and Vessel Head removal with operations and Health Physics as outlined in the Refueling Sequence procedure, Reference 3.8.
Prerequisites of Steps 6.1 through 6.6 have been met as 7.2.1 (applicable).
7.2.2 Begin to take a slight strain on the head strongback without lif ting the head, and ensure turnbuckles are equally taking up the load. Again, perform a visual inspection to verify there are no obstructions which would restrain head lif t or movement.
CAUTION During the initial lif t of the Vessel Head (step 7.2.2), ensure by visual observation that there is no binding and that the head begins to lif t clear of the Vessel Flange evenly at the 0 * , 90 * , 180 * , and 2 70
- Reactor flange azimuth.
7.2.3 With Personnel approprately located to observe the Vessel Head Lift at the 0*, 90*, 180*, and 270* Reactor s
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POH 35.000.83 4+ Revision 5 Page 12 l
flange azimuth points, begin to lif t the head . If any binding is observed secure the lift and correct the -- l cause as necessary. When the head has been lif ted several inches check the head and vessel flanges for ,
parallelism. A machinist level or similar device will be sufficient for this check. Make adjustments as determined necessary to prevent interference. Document on Attachment 1.
CAUTION If not already done, coordinate with the Nuclear Shift Supervisor, and Health Physics to secure ventilating the Vessel Head. Ensure the desired
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reductions in con ~ centration of Hydrogen and Radioactive gases have been met prior to securing head ventilation.
7.2.4 Continue to raise the head enough to visually verify Reactor water level is above the top of the Steam Dryer. Ensure head does not bind on alignment sleeves (on stud covers 1 and 34) or studs as it is lifted.
Have water level adjusted if necessary.
I 7.2.5 Lift the vessel Head out of the Reactor Cavity and transport to the laydown area observing the safe load path shown on Reference 3.21 for the Reactor Vessel Head. Although the maximum lift height is listed as j
" unlimited," restrict the lif t height to the minimum
. required t'o safely complete movement of the vessel head.
CAUTION Due to contamination levels of the Reactor Vessel Head, the head should be wrapped in a suitable plastic material or otherwise contained, as directed by Health Physics.
7.2.6 Carefully guide the Vessel Head down on the three (3)
Head Holding Pede stals over the Cask Washdown Area, refer to Reference 3.15 or 3.21, as necessary. g
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.* POM 35.000.83 Revision 5 Page 13 ~ j 4
NOTE: The Strongback may be disconnected and - l rotated as necessary to allow it to rest on i blocking on the head . for intermediate j storage. Suitable straps (or slings) and j takeups or other appropriate restraining l devices must be used to secure the Strongback }
in place on the head. Other storage i arrangements may be made as determined {
appropriate by the Nuclear Shift Supervisor ;
and Fuel Handling Supervisor. l 7.2.7 Slacken the Crane Cable and disconnect the Strongback from the head. .
s 7.2.8 With the Strongback appropriately stored / secured .and '
crane cable slackened disengage locking pins from the g i' ends of the Strongback hook pins. Using the pin
- ~
insertion tool, or (similar device) push the hook pins
- onto the pin supperts to free the crane hook from the 1 .
center plate. Raise the crane hook clear of the
, strongback centerplate. 7 7.2.9 Arrange for installation of vessel flange protectors, f
as determined necessary, i 7.2.10 Proceed with preparation for Refueling activities in accordance with Reference 3.b.
7.3 Cleaning And Preparation Of vessel Head Sealing Surfaces And "O" Rings i _
- CAUTION I Prior to commencing Vessel Head or flange cleaning and/or "0"-ring inspection and replacement, obtain l
Health Physics approval . Special Radiation Work Permits may be required to perform certain steps covered in this Section (7.3), as designated by Health Physics.
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NOTE: Refer to Reference 3.19, Closure Head Nozzle Details, as necessary.
7.3.1 Prerequisites of Steps 6.1. through 6.3 and Step 6.6 have been met.
1 .
! 7.3.2 Clean ar.d inspect the sealing surfaces of the head vent j
and spray flanges and pipes. See step 5.3 for recommended cleaning materials f
. -- - ~ __ _ _ _ . . _ __.__._________________.______________.._----%
P0H 35.000,83
.. R2 vision 5 Page 14 NOTE (1): Refer to References 3.17 and 3.18, as necessary. --
NOTE (2): Arrange for "0"-ring support as necessary during removal from the head.
7.3.3 Remove the used "O"-rings, one at a time, from the head "O" ring grooves by removing the retainer clips which hold them in place (16 clips each). To do this remove the retainer rings which hold the clips to the pins.
7.3.4 Clean the sealing surfaces of the head flange and the "O" ring grooves using the appropriate materials listed in step 5.3 or approved equivalents. Also, clean the g upper head pipe flange connections, as necessary.
Document on Attachment 2.
7.3.5 Inspect the head flange and "0" ring grooves (see Step 5.5). Also, inspect the upper head pipe flange connections. If significant damage is noted on any flange surfaces, contact the responsible Foreman to arrange for an appropriate resolution. Document on Attachment 2.
CAUTION Head "O" rings are silver plated stainless steel. Do not reuse "O" rings. During installation or handling of new "O" rings use caution to prevent scratching of silver plating or excessive spring. Do not spr ead
. the "O" ring retainers any wider than "is necessary to engage the groove in the retainer pins.
NOTE: If the new replacement "0" rings are already located inside the pedestals and under the head proceed with step 7.3.12.
7.3.6 Observe head and strongback/ turnbuckle match markings (as applicable). Additionally, every time the Vesel Head is lifted, the load distribution at the four lifting points should be visually checked to ensure f
that the turnbuckles are properly adjusted and that the head lifts squarely. An unequal load could result in personnel injury and/or severe equipment damage.
7.3.7 Connect the main crane hook to the head strongback and vessel head as necessary in accordance with Steps 7.1.1, and 7.1.2.
7.3.8 Raise the head to a height suitable to remove the used "0" rings from under the head , and to position the new i, S "O" rings under the head without damaging, s
POM 35.000.83 )
Revision 5 Page 15 7.3.9 Carefully lower the head back down onto the Head Holding Pedestals.
NOTE: Steps 7.3.10 through 7.3.12 may be worked c oncur rentl y.
7.3.10 Slacken the Crane Cable .and disconnect the Strongback f rom the head .
7.3.11 With the Strongback appropriately stored / secured and crane cable slackened disengage the locking pins from g the ends of the Strongback hook pins. Using the pin insertion tool (or similar device), push the hook pins onto the pin supports to free the crane hook from the i center plate. Raise the crane hook clear of the strongback centerplate.
7.3.12 Install the two (2) new "0" rings in the "0" ring grooves of the Vessel Head, one at a time, using the retainer clips (16 clips each). The tongue of the retainer clips engage the slots provided in the "O" rings and are secured to the retainer pin by a retainer ring. The retainer ring is installed using retainer ring pliers and seated in the groove of the retainer pin with a retainer punch or similar device. Document on Attachment 2.
7.4 Reactor Vessel Head Installation 7.4.1 Prerequisites of Steps 6.1 through 6.3 and 6.5 and 6'.6 have been met. .
7.4.2 Ensure that the closure head studs have been cleaned and inspected . Ensure that the studs removed for refueling, inspection or maintenance have been re-installed. Ensure the Stud thread protection covers and alignment sleeves (on Studs 1 and 34) are installed, 7.4.3 Ensure the Vessel Head sealing surfaces and "O" ring grooves have been cleaned , and new "O" rings have been installed per Section 7.3.
7.4.4 Clean and inspect the vessel flange mating surf ace in the reactor cavity in preparation for head installation. See Step 5.3 and 5.5. Document on Attachment 3.
7.4.5 Connect the main crane hook to the head strongback and head in accordance with steps 7.1.1 and 7.1.2.
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,. POM 35.000.83 Revision 5 Page 16 W
CAUTION When lif ting the Reactor Vessel Head observe the safe load path shown on Reference 3.21. Although the maximum lift height is listed as " unlimited ,"
restrict the lift height to the minimum required to safely complete movement of the vessel head. Every
(
time the Vessel Head is lifted, the load distri-bution at the four lif ting points should be visually checked to ensure that the turnbuckles are properly adjusted and that the head lif t s squarely. An unequal load could result in injury to personnel and severe equipment damage.
NOTE (1): The head and vessel flanges shall be checked for parallelism (within 0.045" per foot diametrically is the desired range) (this equates to within 1" [approximately] overall h for the 23' diameter across the flanges) to prevent binding of the vessel head with the studs during installation. A machinist level j or similiar device will be suf ficient for ,
I this check.
NOTE (2): If adjustment of turnbuckles is required the head must be landed. Turnbuckles cannot be adjusted under load .
. 7.4.6 Lift the Vessel Head several inches and check for parallelism between the head and vessel flanges.
Adjust the turnbuckles, as necessary. Document on Attachment 3.
7.4.7 Slowly continue to lift the head of f the Head Holding Pedestals. Check to ensure the flange mating surface and "O" rings are clean and that the "0" rings are i properly positioned and held in place. Observing the safe load path of Reference 3.21, transport the Vessel f
Head into position over the Reactor Vessel to within several feet of the studs.
. POM 35.000.83 Revision 5
. Page 17 CAUTION The head may shift slightly as it is transported from the Refueling Floor into position over .the vessel flange. It is recommended that the head and vessel flanges be rechecked for parallelism prior to attempting to lower it over the studs and onto the vessel flange. This will help to prevent binding between the head and studs and ensure an even mating of the "O" ring seals with the vessel flange. If adjustment is required, appropriate temporary h blocking may be arranged in the reactor cavity between the flanges (head and vessel) to support the head allowing the turnbuckles to be unloaded for adjustment.
7.4.8 With the head properly orientated for correct azimuth, h slowly and incrementally continue to lower the head with personnel in position to guide and properly align the head with the vessel flange and studs. Use caution to ensure the head does not bind with stud covers, or alignment sleeves (on studs 1 and 34). Lower the head to within approximately l' of the vessel flange.
7.4.9 Perform a final verification for proper head to vessel flange alignment, and that the vessel flange and head mating surfaces are still clean. Also ensure the "O" rings have remained properly seated in their grooves.
4 CAUTION Coordinate with operations, to monitor vessel water level carefully until the head is fully tensioned.
Ensure water level does not exceed the level of the vessel flange. Improper sealing may occur if water level is allowed to exceed that of the vessel flange af ter the head is set in place and prior to full head tensioning.
7.4.10 Coordinate with operations to drain the flange leak detection sensing lines. The lines are drained by opening valves B21 F070 (V17-22041) and B21-F071 (V17-2042). Following completion of draining. the valves should be closed and locked, t
POM 35.000.83
.. R: vision 5 Page 18 7.4.11 Finish setting the head on the-vessel flange ensuring I
proper seating of "O"-rings (i.e. , head set ting squarely on flange and not binding on studs, covers, or alignment sleeves [on studs 1 and 34]). Document on i Attachment 3.
7.4.12 Disconnect the Head Strongback from the Vessel Head as follows:
- 1. Disassemble all four shackles from the lif ting lugs on the Vessel Head and return the turnbuckles and shackles to their stowed position on the strongback lif ting arms as necessary. h
- 2. Carefully raise the Head Strongback and return it to its designated storage area on the Refueling Floor or of f the floor as determined appropriate by the Nuclear Shift Supervisor and Fuel Handling Su pe rvi so r .
- 3. With the strongback properly placed , lower the I crane hook to slacken the cable. Disengage the locking pins from the ends of the strongback hook f pins, and using the pin insertion tool (or similar device), push the hook pins onto the pin supports to free the crane hook from the centerplate.
- 4. Raise the crane hook clear of the centerplane.
7.4.13 The head is now ready for stud nut installation and tensioning as directed by the Refueling Sequence Procedure, Reference 3.8.
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7.5 Restoration 7.5.1 After successful completion of all inspections and tests (as applicable), the Protection Leader / Work Leader shall sign the Maintenance Order and process the PN-21 in accordance with Reference 3.1.
END OF TEXT s
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POM 35.000.83
., Enclosure 2, Page 1 of I HEAD HOLDING PEDESTAL w-PAD g d, WEllEL MEAD FLANCE OUTLINE (REF)
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- MHJNTING PLATE 9
f MEAD MOLDING PEDESTALS
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POM 35.000.83 Attachment 1, Page 1 of 1 VESSEL HEAD RDf0 VAL MAINTENANCE DATA SHEET PIS No. BilOIA001 PN-21 No.
Prerequisites Het /
Signature / Date Step Acceptance M&TE No. Description Data Criteria Serial No. Verified by/Date 7.1.1.6 Cran *e hook hook pins attached to seated securely strongback NA in hook recesses NA /
7.1.2.4 Strongback attach- turnbuckles ad-ed to head justed to equally NA share load NA /'
7.1.4 Head free for No visible removal NA obstructions NA /
7.2.3 He ad leveled Parallel with NA vessel flange 1 /
Test Equipment Serial No. Range Calibratien Due Date Remarks:
Completed By:
Name (Print) Signature Initials Employed By Date Reviewed By: / _
Foreman /Date Approved By: /
Maintenance Engineer /Date or Designee 051286 4
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s POM 35.000.83 '
- At tachment 2, Page 1 of 1 CLEANING AND PREPARATION OF VESSEL HEAD SEALING SURFACES AND "O"-RINGS MAINTENANCE DATA SHEET PIS No. B1101A001 PN-21 No.
Prerequisites Het / -
Signature / Date !
Step Acceptance M&TE No. Description Data Criteria Serial No. Verified by/Date i
, 7.3.4 He ad flange see step 5.3 and "0" ring grooves cleaned NA NA /
7.3.5 Inspect head see step 5.3, flange and document dis-
"O" ring crepancies in grooves NA remarks section NA /
7.3.12 Install new All 32 (16 per flange "0" "0" ring) retainer rings clips secured to NA retainer pins NA /
1 Test Equipment Serial No. Range Calibration Due Date
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Remarks:
Completed By:
Name (Print) Signature Initials Employed By Date Reviewed By: /
Foreman /Date Approved By: /
Maintenance Engineer /Date or Designee s
. 051286 1
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- POM 35.000.83
- At tachment 3, Page 1 of 1
< :i VESSEL NEAD INSTAL 1ATION MAINTENANCE DATA SHEET d
PIS No. B1101A001 PN-21 No. ,
Prerequisites Het /
Signature / Date Step Acceptance M&TE No. Description Data Criteria Serial No. Verified by/Date 7.4.4 Clean and inspect See steps 5.3 and the vessel, head 5.5 flange mating surface NA NA /
i 7.4.6 Head leveled Parallel with vessel flange within 0.045" per NA foot diametrically NA /
, 7.4.11 Head properly Flanges square i seated on and not vessel flange NA binding NA /
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Test Equipment Serial No. Range Calibration Due D9te E
Remarks:
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Completed By:
- Name (Print ) Signature Initials Employed By Date Reviewed By
- /
Foreman /Date i
Approved By: /
Maintenance Engineer /Date or Designee i
END i 051286 4
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USILf CEPCOT RIII Un1E 06/19/86 FeCILITY/ LICENSEE: CLINTON NO T IF IC A TION: TELEPMomE my LICENSEE SodJLCT: SMONT IN ELECTRO HYORAULIC CbMTROL ILHCl CINCUIT EVEqis ILLINOIS PoeE4 COMPANY REPORTED THAT A FLASH OCCURRED IN A PANEL WHEN THE EHC UNIT WAS ENERSIZE0 FOLL0eING m4INTENANCE. INITIAL REvlEW IN0! CATES TMAT A METAL CA8LE 10ENTIFICATIO4 TAG SHORTED bETWEEN TWO OF THE 48G VOLT TERMINALS In Tnt PANEL. TnE LICcNSEE u!LL SE INWESTIGATING TO DETERMINE THE CIRCUNSTANCES IN WHICH THE METAL TAG WAS PLACEO ACROS$ THE IteminALS. eECIONAL ACTION: THE INCIDENT WILL RE FOLLowED HY EITHEN RLGIONAL OR RESIDENT INSPECTOR. FACILITY / LICENSEES FERN! 2 NOTIFICATION: TELECON FRON RESIDENT INSPECTOR budsECTs Ise0ICATI3gs UN REACTOR PRES $uRE WESSEL'HE40'; tvEwin ON mEONE SD AY AFTERN00No JUNE 18, 1986. REGION !!! WAS INFcRMC3 NY DETROIT EDISON COMPANY IDEC01 THAT Noetwous INDICATIONS wERE OBSERVED ON THE REACTOR PRESSURE WE5SEL HEAS INSIDE THE INNER "0" RING GROOVE. S0WE OF TME IN01 CATIONS APPEAR To et AdouT 0.003 INCHES DEEP. DECO IS SETTING Up A TASK FORCE TO INVESTIGATE THE OcTTEM AND ALREADY HAD bE AND OTHER CONSULTANTb INVOLVEn. THL DECO REPRESENTATIVE.ALSO INFORMED REGION III IMAT h!NILAd TYPE IwoICATIONS HA0 8EEN DISCOVERED IN THE PAST ON THE TOKAI 2 REACTOR. (ESIONAL ACTION: inE RESIDENT INSPECTORS AND REGIONAL MANA6EMENT WILL CLOSELY FOLLOW THE INVESTIGATION. FCCILITY/ LICENSEES SENEMAL n0TIFICATION: SudJECT TME NRC APPOINTED MATERIALS SAFETY REGULATION STUOY GROUPe COMPRISED OF DR. CLIFFORD SMITHe MR. EuhDN CASEe me. TM0eAS ENGELHARDT, me. HALPH PAGE, AND DR. JOHN 600GINe AND THE GROUP'S NRC LIAISONe OR. 00N1LO COOLe u!LL VISIT THE REGION III 0FFICE JuNL 19 1986 fu DISCUSS FUEL FACILITY AND MATERIALS LICENSING Amo INSPECTION MATTERS. EtEnis s CE310NAL ACT10N INFORMA T* 1080 C b \
RPV INDICATIONS , INDICATIONS OBSERVED IN INNER "0" RING GROOVE SIMILAR TO THOSE FOUND IN PAST ON TOKAl 2 APPEAR TO BE CHEMICAL CORROSION LICENSEE /GE/ REGION 111 EVALUATING I i G l 4 h -- a -
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> Edison Deviation / Event Report Nu-e r NP-% o;d4e , e. fy, P;rt 1 Identification and Description Otle .
Indications on Seatina surfaco Reactor Hoad B. Ouustence. Date Time C. Sa f ety . Related D. 5ystem E. PIS 06-12-86 1 1345 hrs 9 Y,s O No B 11 il l-10 il nl il il nlil al m nl il F. Description of occurrence or condetion Numernus indications nf unknown nrinin in (natinn curface
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of "0" Rina arooves. both inner and noter ornnvnt-Vt5eAs IN5PEcried luDunrC5 LincR hlDiM rhx/ ADO JNT7 mci M ?hr
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SEE Aff;eado fMuca (*f ) G. immediate act.on Informied D. Colo of nFC0 Maintenanco_ whn enntacted n_ F- Reds . on 3j_ta,_ H. Ce f erenc es I. Initi or / Org /Section Date 35.000.83 Sect /.3 4 #fr'ere/v4 I&/5-86 J. in ator's 5upervisor Date
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Part 2 ReporMbility D. 10CF R5012 O ves '2FQdo Person Contacted n 1 Hr n 4Hr Date - T.me 10CFR50 71 M Yes M No LE R Number 10CFR21 B Ye<; M No/ _ LE R Due Date o B D.termin.d Ry (A' /C,/4 /J3-T~ orn ,5et & ,r! .J tw e 4 - ~ - V4 - Scrt 3 / CARB Review l l l l suept description of ouurrence and immediate action lW Yes n No n No
,. Accept reportability determmat+0n @ Yes C. 05RO meeting required n Yes R No Meetinq No Date D. E valuation and Act.on Ass,qnment - F. Carb-NP Only n RadChem n NQA R NT n NA R NOM M Maintenance (9 Technical n NE O NS 19 NP O MNFM' O Crerstions n Other E nluator Section Evaluator _ $ection E. E valuation due date rov // Ofl% M Da e 6,-d3 -8b II G.C998OA Cfew_ l bu6M Part 4 Evaluatjdn A. Describe the root cause of the deviation 1
Ditermined B f Org /section Date B pernad s (If required, attach a Corrective Action Sheet) P;rt 5 l Work Completion C. Approved By Org / Section Date
, I art 6 l NQA. Completion Review l.
Revievved By Section Date I l
- Send To CAC DE 963-663108 85X
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\J Y l +s DAILY REPORT REGION LII L N '
x y, b ,3 s DATE: 07/11/86 l [ (1 q , %' a~ FACILITY / LICENSEE:', CLEVELAND ELECTRIC ILLUMINATING COMPANY
- PER9;Y NUCLEAR POWER PLANT UNIT 1 NOTIFICATION: REGIONAL INSPECTION TEAM 1',
SUBJECT:
. OFFGAS SYSTEM CHARC0AL ADSORBER FIRE (UPDATE) 2 'EVErbI ON JU.Y 11, 1986, THE LICENSEE PRESENTED THE NRC WITH THE PLAN FOR
, , RECOVERY'FR0ri THE CHAPC0AL ADSORBER BED COMBUSTION EVENT. THE REC 0VERY PLAN s .s 4'HAD BEEN REVISLO TO INCLUDE REMOVAL AND REPLACEMENT OF CHARC0AL IN ALL EIGHT a GFFG45 SYSTEM ADSORBER BEDS. THE LICENSEE PLANS TO PRESENT THE CHARCOAL UNLOADING AND LOADIt:G PROCEDURL1 MTI-0006 BEFORE N00N TODAY. THE LICENSEE
> # 5 NOT FIDMED UP A T;HE AND DATE FOR CHARC0AL UNLOADING BUT IT APPEARS THAT OHLOADING V4Y TAKE PLACE MONDAY. THIS AFTERNOON THE LICENSEE WILL DISCUSS X '" WITH THE NRC' THE WORK THAT WILL TAKE PLACE OVER THE WEEKEND FOR THE CHARC0AL sREMOVAL.
s' . ( - REGIONM. ACTION: FOLLOWUP BY THE RESIDENT AND REGIONAL INSPECTION STAFF TO VERIFY LICENSEE ACTIONS SET FORTH IN THE CONFIRMATORY ACTION LETTER ISSUED BY RECION III ON JUNE 23, 1986. s s. , Facility / Licensee: Fermi 2 i
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Notification: SRI
Subject:
REACTOR VESSEL HEAD INDICATIONS n
't Event: During the week of July 1,1986, the licensee completed inspections on
! the RV head and flange. Of the 200 indications on the RV head only one had
- any depth greater than 0.005". This indication was .027" deep. The RV
_5 4 1 ,- flange did not have as many indications as the head and none had any depth s
" greater than .005". Based on G.E. recomendations the .027" indication was weld repaired on Sunday, July 6, 1986 by GE personnel. Weld repair was completed by grinding out the indication to a depth of .040" and welding l new cladding in the ground out area.
l l Regional Action: InformationandfollowupperMC25$5 l [}}