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					     AFPC Norm Decontamination Facility Plant
                                  (NDF)
1.         Introduction
-   The passage of produced water through pipe work and plants leads to the
     built up of Norm scale on the inner surfaces, which can present an
     external radiation Hazard during normal operation and an Internal and
   external hazard during maintenance work.
- AFPC have made a policy decision to manage the NORM wastes in
   accordance with best international practice.
- AFPC constructed a Norm Decontamination plant by the AEA
   Technology.




                                                                              1
- The AFPC NDF plant is used to remove NORM contaminated scales
   from Production equipments in order to be prepared for re-use or
   safe disposal.
- The plant is   run continuously for 10 HRs per day and 365 days per year
     (except the break down maintenance & De- sludging shutdowns)
-   Sump pumps to transfer process water from the jetting bays / lancing
     machine into settling tanks that designed to allow fine NORM
     particulate to fall out of suspension in the process water stream.
- The AFPC     NDF plant achieves decontamination level down to 0.37
     Bq/Cm² for Alpha radiation and 3.7 Bq/Cm² for Beta radiation.




                                                                             2
2. NDF Main Parts:

1- A general area with:
  a) Operators Change room with showers: with barriers and
     monitoring equipments
 b) Visitors Change room with showers
 c) A hooded Gas Cutting area: breathing air supply is
    required for Operators
 d) An active Laundry: with ventilation and waste feed direct
    to a disposal tank
 e) A water Jetting area for Decontamination


                                                                3
2- A Pump House with High Pressure Pumps for Equipments
    Decontamination:
   * Process water is extracted from settling tanks and
     conveyed to the water filter units, where cartridges will
     remove particulate down to 10 micron.
a) High pressure pump for tubular decontamination
b) Low pressure pumps for sump and water re-circulation
3- Active air samplers to monitor airborne activity and
   ventilation system




                                                                 4
Extract Ventilation System
HEPA filters
4- A tubular Decontamination plant for tubes Decontamination:
   - 1000 bar operational pressure
   - It is hydraulically operated and controlled de- scaling
     machine
water chiller: is to cool the process water temperature which
  has gained heat after passing through high pressure pumps
  and lances.




                                                                5
5- A lay down area for equipments dismantling to be
    decontaminated
6- A Lay down area for decontaminated equipments
7- A temporary waste store building for main and
    secondary waste temporary storage.
8- Health Physics Laboratory




                                                      6
                                  AFPC NDF Plant Layout
                          W. Chiller          NDF Layout                                   A. Chiller


                                                                                      W.Shop          H.
                  Tubular lance                                            Store                      VAC
                 1K.bar Press
Controlled                                                                                   Air
                Tubular      Primary     Secondary
Area            C.Room        Settling   Settling
Tube Racks                     Tanks     Tanks                                               Luck
                                                        Dismantling Bay
Contaminated                                                                                          Delay
Equipments                                                                                            Tanks
                 Hepa                    Jetting Bays                                      Op.Cha.
                 Filter    Pump                                Burning Bay                 Room
                                         2.K. bar.
                 Room      House                        S.Ch.R




                                                                                                        Laundry
                                         pressure                         HPS
                                                                                           Visitors
                                                                          Office           Change
                                                                                           Rooms
                                                                                    Mess
                                         Offices                          W.C      Room

                                                                                               Main
                                -Gate




                                                                                               Gate

                                                                                              Guard
                                                                                              House
      Contaminated
      Scale Drum Store                               Clean Area                             Sun                   7
                                                                                            Shade
               The NDF External Layout

Drum Store        Offices, Mess   Controlled Area At The back
                  Room, W.C.
       Clean      Spares
                  Stores                                Air Luck
       Area




                     Main Gate
                     Guard
                                                                   8
Burning Bay




              9
High Pressure Jetting Bay




                            10
Tube Plant Machine




                     11
Jetting & Burning Curtain




                            12
Waste Bags




             13
Filters Bank




               14
                Controlled Area
       Contaminated Equipments Wrapping




1. Received items are wrapped in plastic bags.
2. Vehicle wheels must be checked by the plant
   HPS Prior to leave the Plant. Apply
   Decontamination if required.
                                                 15
H.P.S Office




               16
3. Decontamination of equipment
1. Receipt of equipment from Owners with all the required info
   included in job work Request form (Owner name, indicator
   and telephone number, location, equipment explanation for
   reused OR scrap, numbers of equipments, Norm certificate
   checked by the location RPS, job priority based on
   equipments reuse or HSE condition)
2. NDF Plant manager and HPS Recheck the work request
   information and compare.
3. HPS Recheck the Norm contamination of the received
   equipments
4. Off loading At NDF controlled area
5. Check the vehicle body and wheels prior to leave the facility
   and Decontaminate if required

                                                                   17
Clothing Minitor




                   18
Air Sampler




              19
PPEs




       20
6. Write NDF Local number
7. Organizing Job based on priority
8. Start Decontamination based on equipments type until
   back ground
9. NDF contact the person who raised the WO when achieve the
   Decontamination.
10. Transport the Decontaminated equipments to the Central
   work shop for maintenance OR contact the Owner to take
   the equipments back as required.
10. Issue Clearance Certificate OR Radiological Survey
    Report as required



                                                               21
22
Clean Equipments Area




                        23
        4. Important Issues Of AFPC NDF Plant:

1) Modern, closed recycled process water system, Air extracts
   system (safer)
2) Tight environmental controls
3) All NDF workers are Norm aware and radio logically
   classified
4) All the plant workers carry out annual Radiological and
   Medical examination at AESC Establishment.
5) Personal Film Badges are inspected each two months by
   AESC
6) All unsafe act/condition and incidents shall be reported
7) The plant building is air conditioned to give a maximum
   working temperature of 25 C°
8) Work schedule is 12 hrs day shift, Actually 9 HRs work
   (From 06:00 to 08:30, from 09:30 to 12:00, from 13:00 to
   15:00 and from 16:00 to 18:00 HRs)                           24
9) HPS Checks vehicle body and wheels prior to leave the
    plant. Apply Decontamination if required
10) All employees wear the appropriate PPEs as required
    (Where Respiratory Protective Equipment (RPE) is
    provided for use in particular Circumstances)
11) First Aid is provided at all times
12) All employees shall be made aware of Permanent
    Instruction, which is to be followed in the event of an
    incident requiring First Aid or Ambulance.
13) The Norm contaminated scale & Sludge are removed from
    the tanks, and containerized in plastic drums and stored in
    the waste drum store through a sequentially De-sludging
    shutdown of the plant.



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