ML20235P459
| ML20235P459 | |
| Person / Time | |
|---|---|
| Issue date: | 11/26/1986 |
| From: | Hind J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Cunningham R, Partlow J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE), NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20235P132 | List: |
| References | |
| FOIA-87-323 NUDOCS 8707200494 | |
| Download: ML20235P459 (27) | |
Text
!
l NOV 261986 MEMORANDUM FDR:
Richard E. Cunningham, Director, Division of Fuel Cycle and Material Safety, NMSS James G. Partlow, Director, Division of Inspection Programs, IE FROM:
Jack A. Hind, Director,. Division of Radiation Safety I
and Safeguards, Region Ill
SUBJECT:
ALLIED TEAM INSPECTIDN, NOVEMBER 3-7, 1986
)
1 1
Enclosed for your review is an Executive Summary (Enclosure 1) of the subject l
inspection and a copy of the Inspection Report (Enclosure 2) which addresses
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the inspection findings in more detail.
In addition, all remaining open items from the three team inspection are included in the Executive Summary.
Should you have any questions regarding this material, Mr. W. D. Shafer of my staff will be happy to meet with you.
gg i
4 rack A. Hind, Director Division of Radiation Safety
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and Safeguards
Enclosures:
As stated cc w/ enclosures:
i G. L. Sjoblem, IE W. Crow, HMSS J. G. Keppler, RIII I
l A. B. Davis, RIII L. R. Greger, RIII G. F. France, R111 l
9707200494 87071D SSE
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ENCLOSURE 1 Executive Summary
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The following summary information contains only a brief highlight of new issues or continuing issues identified in previous team inspections conducted earlier this year.
a.
Radiological Protection The licensee continues to have a good HP program.
Some progress was noted in the adequacy of personnel frisking techniques; however, personnel were again observed to be frisking themselves too rapidly to be able to detect 2
contamination levels of 200 dpm/100 cm.
This license condition appears 2 that to be very restrictive when compared to the limit of 1000 dpm/100 cm licensees administrative 1y impose on nuclear power plant personnel.
Independent measurements in the form of smear surveys were conducted in high traffic areas such as locker rooms, lunch rooms and the plant's main exit.
The results of these measurements confirmed the licensee's position that contamination is not a significant problem at this facility.
b.
Plant Operations The licensee is continuing in their effort to upgrade procedures in all areas of the plant.
The most important process procedures have been completed and procedure upgrades relating to other areas are expected to be completed in the near future.
A problem noted in the area of procedares is the negative attitude expressed by the licensee's employees.
In general, the employees took the position that while procedures are a nice reference, they did not need them to operate the systems they have operated for many years.
This position appears to ignore the fact that the procedures have been upgraded and the way things were done several years ago may have changed.
The licensee is aware of our concern and intends to take action to change this attitude.
1 Another area of concern was identified when a team inspector observed i
employees moving equipment with the overhead crane in the vicinity of the UFs fill station.
Several poor operating practices were noted such as:
(1) lifting empty UFs cylinoers with only two hooks instead of four; (2) lifting the cylinders higher than necessary; (3) mcving test weights over empty cylinders; (4) tailure te adequately control the load to prevent bumping into into obstructions; and (5) manipulating the overhead l
crane and the cylinder trolley at the same time.
While none of these l
l activities were observed during movements of full UFs cylinders, there was little evidence that these operating practices would not be conducted when 1
a hot, filled UFs cylinder was being handled. The licensee was informed l
cf our concerns and will identify their corrective action in writing.
I i
I
I c.
Fire Protection l
The inspection in this area was a new initiative at this facility. While there are no NRC regulatory requirenrmts imposed on the licensee relating to fire protection, we noted that the licensee appeared to-be violating several OSHA standards and were also violating the Policy established by Allied Chemical Company.
A copy of this report was sent to OSHA fer their review and action as they consider appropriate.
i d.
Emergency Preparedness The licensee has taken significant corrective action on the inspection findings identified during the team inspection conducted in early 1986.
-l Again, the major problem in this area appears to be training and retesining of plant personnel. The licensee is continuing to evaluate training needs with the assistance of a contract consultant.
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e.
Lessons Learned Committee (LLC) Recommendations A review of the licensee's initiatives regarding the LLC recommendations i
revealed that the licensee conducted evaluations of each issue and either implemented corrective actions or had developed plans to meet the i
recommendations in the near future. We understand that HMSS has the lead l
responsibility to determine the adequacy of the licensee's position for each LLC recommendation.
f.
Training 3
The licensee has completed initial training for 188 personnel to date and
]
is providing this training for additional personnel as needed oc videotape l
(instructors are present when the tapes are used).
However, a periodic j
retraining program has not been established.
The licensee is working l
closely with a consultant to identify and implement a retraining prcgras.
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g.
Licensee's Responsiveness to NRC In general, the licensee has been very responsive to the NRC concerns identified in the last three team inspections. The team managed to close out a significar,t number of open items from the past team inspections and only opened eleven new items as a result of this team inspection. While more work remains to be accomplished, we were assured by the Plant Manager that Allied Chemical will continue to be sensitive to safety issues.
The most notable initiative taken by the licensee was the development of a Hazard Review Committee. This Committee was tasked to walk the plant and identify any safety issue that had the potential to be a safety problem.
Issues considered to have the highest priority have been addressed and work was continuing on other issues.
h.
P1 ant. Condition Considerable effort was expended by the licensee to improve the condition of the plant.
Most notable were the improvements made in the Feeds Material Building Control Room.
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i Inspection Conclusion i
As stated previously, the licensee has been responsive to the initiatives l
proposed to date by the NRC; however, the licensee needs to develop'a more formal program that will not only ensure that the remaining work will i
be comoleted, but will include a permanent overview feature that will
{
prevent the' licensee from doing business as before. We understand that i
NMSS will request Allied Chemical Company to develop a Quality Assurance' Program which should provide this assurance; however, our routine j
inspection effort will continue to monitor tiie licensee's performance.
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L 1.
6 Inspection Findings Remaining Open Items from Previous Team inspections in 1986 Report No. 40-3392/85002 j
02 - Open Item - Fresh air supply for the control room.
11 - Open Item - Backup communications link l
Repntt No. 40-3392/86003 02 - Open Item - Lack of expertise and independence of auditors.
1 08 - Open Item - Personnel perform ineffective frisking, j
09 - Violation - Survey instruments could not measure 200 dpm/100 cm2 as required by license.
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19 - Open Item - Control Room instruments and alarms not on emergency power.
37 - Open Item - No retraining on chemical or distillation process.
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40 - Open Item - Memos used to instruct personnel on operation activities.
No l
l review process.
)
New Open Items l
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Report No. 40-3392/86006 l
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01 - Open Item - Use of respirators in roped off areas of the Feeds Material i
Bujlding.
1 02 - Open Item - Evacuation of UFs from cylinder with leaking plug.
03 - Open Item - Line-of-sight use of remote chance controls (response required).
04 - Open Item - questionable operating practices when using overhead crane l
response required) 05 - Open Item - Identify items critical to health and safety on maintenance joblist.
06 - Open Item - Control of combustible material housekeeping.
1 07 - Open item - Flush test of fire hose stand pipe system in the F?cds Materia! Building (response required).
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9 4
i
..,_.f.-
Storage Tank (response l
08 - Open Item - Review hazards associated with CO2 required).
09' Violation - Failure to conduct monthly training for emergency response l
teams (response required)
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10 - Open Item - Develope a retraining program on Radiological Contingency-l Plan.
i 11-- Open Item - Monitor employee's attitude toward using procedures.
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't 9 DEC teet i l
J N.R.Williamsen ALLIED 10-TON CYCLINDERS..
(Name:AL 10 TN) 12/29/86 I have a copy of their procedure for weighing cylinders of less than 14-ton, namely 10-ton cylinders...
4 The artual pages for 10-ton" are pages 18 and 19 in the
~19-page bundle of procedures,,,
l Two problemsa (1)-they did not give us the 'UF-6 Cylinder check Sheet" whereon they apparently enter the *real" tare weight (that is, +,he tare that might have a UF-6 heel, in C0tRRADISTINCTION to the ' Historical Tare" which has no heel and is probably' stamped on the cylinder ' boiler plate'...
Both ' tares", however, are evacuated..)
(2) The DISTILLATION CYLINDER FILL RECORD, page 17 in the 19 page bundle, does NOT have a place to indicate what the nominal size of the cylinder is (10-ton-versus 14-ton)..
f(o 005 -26
,/ My team was satisfied that they could close the open b
item and in my draf t of the Allied report (86007) I so 1
indicated.. - 0EORGEFI C# NOTI!SStCTNE'RtiPORT tNTIL I GET
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YOUR.0 PINION,.. HATLDO YOU THINK??
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2.3 Continuous operations i
Once the distillation unit is in operation, very little adjustment should be required by the operator.
An increase or decrease in rates is accomplished by adjusting FRC-404 (product takeoff control valve) to the desired flow rate.
The rest of the system should automatically adjust itself.
The rate of impurity takeoff is accomplished by adjusting either FRC-406 (low boiler) or FRCu413 (high boiler).
Once again, the balance of the system should adjust itself.
Selected parameters from the distillation unit will be recorded on the log sheet every two hours.
See the end of this section for a copy of the log sheet as well as a list of typical operating parameters.
A.
Product Cylinder Pilling During the filling process, the " Distillation cylinder Fill Record" will be completed on each cylinder.
Tinis log sheet provides a condensed record of cylinder fill times and resulting cylinder weights.
See a copy of the " Distillation Cylinder Fill Record" 3ater in this procedure.
1 Transport a cylinder from the yard staging area to the distillation area.
Empty cylinders are transported on a forklift truck of_the appropriate capacity.
2.
Evacuating UF6 Cy}inder:a UF6 cylindere that contain air must be b
c
= ew ew w<r o w (T W dse 29,86:08:53 ALLIED-ENG. MTLS. SECTOR-METROPOLIS, IL-618 524 2111 P-.03/1 avacuateu prior to filling.
There are a variety of reasons for this requirement t They includes c.
If.the air contains molature UF6 Will-r re&ct with the water to form.UO F2 2 snd BF.
Both of these_ compounds can' create sampling and analytical problems, b.
A cylinder that-contains air at 0 psig (no pressure /no minus) will weigh l
approximately 12 pounds more than an evacua ted _ _ cyl inder. < Pressurized air w,ill weigh..even more.
If the cylinder _ is pressurized, there
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c.
may be problems filling the cylinder.
In order to prevent this, all clean and new cylinders will be evacuated' prior to filling.
The procedur4 is as follows:
a.
Determine that the cylinder does not contain a heel of UFg.
Normally, a cylinder with a heel will.already:have a strong vacuum.
If any doubt existw do not. evacuate the cylinder until notified by your' supervisor.
6.
Connect the vacuus line to the _ cylinder-
' valve. -Vacuum source is-frot the distillation Kinney pumps (P-4451, P-408).
-The. evacua tion.. li ne bypasses -
the' sample cold. traps.
T. tart one of-(
1 1
tr e v D5e 29,86 08:54 ALLIED-ENG. HTLS. SECTOR-METROPOLIS, IL-618 524 2111 P.04/1g the kinney pumps.
c.
Open the cylinder valve and observe the pressure on the gauge.
If the vacuum is below 22 inches of mercury, the cylinder has already been evacuated or has a heel in it.
d.
Open the valve on the vacuum source.
Allow the cylinder to evacuate until the reading on the gauge stabilizes.
1 (less than 22 inches mercury minus).
e.
Valve the vacuum source off and watch the reading on the gauge.
1.
If the gauge doesn't move, the cylinder has been evacuated.
2.
If the gauge shows that you are losing vacuum, then there is a leak (tighten connections) or the cylinder may have some UF6 in it.
f.
Once the cylinder has been evacuated, close the cylinder valve (trapping a strong vacuum in the cylinder) and disconnect the minus source.
The cylinder is now ready for filling.
NOTE:
If a cylinder with a heel in o
1 it needs to be evacuated, a si=ilar proccdure is used except the minus source is provided by the PP-8 line at
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9,86'08:54 ALLigD-ENG. MT6s SECTon-H a
OPOLIs, IL-618 524 2111 P.05/1g 5'
the cylinder scale, or at one of the fill spots.
3.
Perform the profill check sheet.
See a copy of the "UF6 Cylinder Check Sheet" at the end of this section.
4.
An evacuated and tare weighed cylinder shall be placed in the desired fill spot (see UF6 Cylinder Weighing Procedure).
The cylinder checkliat shall be completed and the cylinder hydrostatic pressure test date shall be i
checked.
If any items are not in compliance (i.e.,
test date more than five years old),
the cylinder is not to'be filled.
The cylinder valve shall be in the 12:00 O' clock position.
The cylinder shall be chocked and the roller locked out.
5.
An "in date" cylinder filling pigtail shall be visually inspected.
Put 2 new TFE gaskets in each end of the pigtail.
6, Remove the plate covering the pigtail slot in the base of the steam chest. ' Connect the pigtail to the cylinder valve then to the filling manitold making sure the pigtail fits down into the slot in the base of the steam.
chest.
Proper additional safety attire is leather gloves.
NOTE: See Section 5.0 for the JSA concerning the hook up of a pigtail.
.-m vm w
tr e s Dec 29,86 08:55. ALLIED-ENG. htL6.
SECTOR-METROPOLIS,-IL-618 524 2111 P.06/1!
7.
~ wrap serpentine. heaters around pigtail and valve and pleeg thee in.
This will prevent UF6 freezeout from plugging the pigtail.
Ensure that the pigtail' is getting hot, 8.
"Zero* the corresponding point on WR-421 using the keyswitch in the control room.
This must be done af ter the cylinder pigtail' I
is connected but before filling begins.
If the distillation system is on total recycle, and you are preparing to fill the first cylinder, then ensure that the toggle switch for the Ur6 flow totalizers is in the' i
- RECYCLE" position then press the "ZsRO" l
button to sero the totalized flow.
I NOTE: 1.
The zero and recycle buttons are located in the control room and 1st Floor Distillation.
i 2.
If a cylinder is already being filled and you are just changing filling to a new position, the l
toggle switch should remain in the
" OPERATION" position and the l
"ZERO" button should not be l
pressed until the full cylinder is l
1 valved off.
See Step "18".
9.
Adjust the flow rate through FRC-404 to the i
desired cylinder fill rate.
Rates are set j
based on available and. projected crude UP6
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Dec 29;86f08:55 ALLIED-ENG. HTLS.-SECTOR-METROPOLIS, IL-618 524 21111 P.07/1 t
feed.
Rates should not be changed In the i
middle of a.-cylinder under. normal operating q
conditions.
10.
With the cylinder valve closed, open the PP-8 valve and' evacuate-the pigtail.
close'the'
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PP-8 valve.
If the minus drope, cheek.both pigtail connections.
i 11.
Should the connections leak, it is.usually j
necessary to -evacuate the pigtail and' install l
2 new TFE pigtail. gaskets ~ at the ' leaking '
connection.
NOTE: 'If PP-16 or PP-8 valves. leak through, a vacuum check will'not be'possible. - A i
" smoke check' is the only check that can be performed.
12.
If the system pressure checks good, filling can commence, or the cylinder.can ba lef t until the preceding cylinder is : full.
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13.
If the cylinder is a cylinder that contains a heel check the "minus" on the-cylinderfat i
this time.
1.
Close PP-8 on the-manifold.
I 2.
Close PP-16 on the manifold.
i 3.
Open the cylinder valve.
4 If the gauge on;the manifold doesn't indicate at least 14 inches mercury.
i minus, open PP-8 and allow the cylinder to be evacuated down as low as 'it will'
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i Dac 29,86 08:56 ALLIED-ENG. HTLS. SECTOR-METROPOLIS, IL-618 524 2111
- P.08/1(
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spoTar If the cylinder has to be evacuated it will also have to be disconnected from the fill marifold and a new tare weight obtained.
14.
Close the PP-17 recycle valve just below the product condenser to the still feed tanks.
the PP-17 valve at each still feed tank remains open during normal distillation operation.
Open PP-16 product fill valves-l l
f rom the product condenser through to the i
filling manifold on the first floor (there are two valves, one at the product condenser and one at the manifold feeding all four fill spots.
15.
Plush about 500 to 1000 pounds of UF6 through the product manifold and back to the cold traps by opening the product manifold valve and the pigtail evacuation (PP-8) valve.
This will flush the filling system.
'If a switch is being made from one full cylinder to an empty cylinder, this step isn't necessary.
16, close the product manifold valve and wait two l
minutes, then close the pigtail evacuation' line.
17.
With trie cylinder valve open and the evacuation line (PP-8) valve closed,
. _ _ _ - _ = _ _
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. J C:23 '86-0?!53
-P09 29,C6 08:57 ALLIED-ENG. MTLS. SECTOR-METROPOLIS, IL-618 524 2111' P.09/19 s$
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l gradually open the valve fron the product manifold to the cylinder pigtail.
This i.e.
L called ' smoke checking *. Any leaks are repalred and the connections retested.. The
. cylinder is ready to' fl1~1 or.ce all leaks are -
stopped.- If the conn'ections don't leak wait a couple of minutes then fully open the PP-16 l
valve.
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18.
Relect the fill position on the four position i
selector switch that you are beginning te fill into.
Ensure that the toggle switch for the UF6 flow totalizers is in the " OPERATION" position and press the '2ERO' button.
NOTES:
1.
When you select a fill position with
.1 the four position selector switch, this will cauce two large lights to come on at the fill position you have selected.
This is tn ahnw the nrane nperator the position that is currently being filled into.
l 2.
At any. time during the filling of a cylinder that the distillation system l
aust be placed in total recycle, the UP6 flow totaliser toggle switch must-be plac ed in - the ' RECYCLE" position to stop flow tota 11 ring.
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19.
There may be a loss or decrease in flov l
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DEC 29 '86 07353-P10 Dsc 29,86 08:57 ALLIED-ENG. HTLS. SECTOR-METROPOLIS, IL-618 524 2311 P.10/1 through rac-404.
This is due to the system being closed for flushing, connecting and pressure testing.
A testorary loss is normal and flow.should be reestablished upon I
casamencement of cylinder filling.
20.
Failure of flow to reestablish osually indicai;es blockage in the cylinder valve or pigtail.
Check that the serpentine heaters are on and rewrap heaters if necessary.
NOTES:
The operator should remain at the cylindeer -
during the first' S to 10 minutes of filling ince valve or pigtail blockage is most s
likely to occur during this time.
The operator should check indications that the cylinder is filling such as hearing the flow entering the cylinder, noticing that there is no pressure buildup in the filling nanifold, and watching the cylinder's. weight gain on the WR421, digital indicators at the fill l
spots.
21.
Record information concerning the cylinder number, fill position, and the. fill start time in columns 1, 2, and 3 of the
' Distillation cylinder Pill Record" respectively.
Record the historical tore weigh of the cylinder in colume. 12.
22.
In column 4 of the fill record, record ' the
DEC 29 *86 07i34' P11 Dsc 29,86 08:58 ALLIED-ENG. MTLS. SECTOR-METROPOLIS, IL-618 524 2111 P.11{
estimated time for completion of the fill cycle.
Record the time of day in column 4, not the elapsed fill time.
The estimated time for completion of the fill cycle can be computed as in-the following example:
{
Example:
A model 48Y~ cylinder is to be i
filled to the Allied-target weight 1
of 26,000 lbs UF.
The fill rate 6
from FRC-404 (ie. 3500 lbs UF /hf) 6 i
can be divided into the desired i
fill amount (26,000 lbs UF ) to 6
l determine the estimated fill elap. sed time.
This time (7.4 l
hours-or 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> and 24 minutes) 1 can be added to the start time i
(0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br />) to determine the full i
time (1424 hoors).
This time is o
l to be recorded in column 4.
23.
Set the control room fill timer to alarm at the estimated full time.
In the above example, the timer should be set to alarm 7.4 l
l hours later.
The timer alarm is an extra measure to alert the ope ator that the end of-i the fill cycle is near.
24.
At least once per shift for each cylinder filled, check the fill rate from WR-421 and i
l write the calculated fill rate on the WR-421
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(PU7A Doc.29,86'08:58 ALLIED-ENG. MTLS. SECTOR-METROPOLIS, IL-618 524 2111 P.12d l
calculation is done as follows:
Mark the WR-421 chart at some point on the fill line.
Time the chart for at least one hour and mark the fill line again.
Use the following i
equation to determine the fill rate.
weight at Time _ 2_ (1be)-weight at Time 1(1bs)
=
Time (Bours)
Fill Rate (lbs UF / hour) 6 i
i NOTE: During each shift, a supervisor is to check the operator's fill calculation and is to initial the " Distillation I
Cylinder Fill Record
- in the
" Initials
- column if the information is correctly filled out.
25.
Cylinder fill weights will not exceed the limits on the cylinder weight chart for the type of cylinder being filled.
See Section 5 Part D for cylinder information and Allied target weights.
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26.
If a cylinder is believed to be overfilled, l
see Section 5.0 Part A for the procedures 1
that deal with overweight UF6 cylinders.
l
_UNDER NO__C_ CIRCUMSTANCES SHALL HEAT BE APPLIED T0_AN OVERFILLED CYLINDER 1 i
1 27.
When full as determined by either the weight l
on WR-421 or the totalized weight from either l
of the product flow totalizers, close the product manifold (PP-16) valve and open the l
DEC 29 '86 07:55 P13 Dec 29,86 08:59 ALLIED-ENG. HTLS. SECTOR-METROPOLIS, IL-618 524 2111 P,13/
t 1
1 pigtail evacuation (PP-4) valve.
l 30TES:
l.
The two product flow totalizers and i
i WR-421 will rarely exactly agree with each other.
In decidf.ng when to terminate the filling of a cylinder, 1
l the following guidelines should be
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used:
If there is no deviation alarm, a.
then use the cylinder weight on WR-421.
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b.
If ther: is a deviation alarm active, then use the highest of all three indicators (WR-421, Chameleon A, Chameleon B).
2.
It is acceptable to operate with only one Chameleon product flow totalizer in service if the other Chaneleon is clearly labeled as being out of service and approval is granted by the UP6 1
General Foreman and Distillation l
Technical Supervisor.
If this is the case, then in Ib, above, you must terminate cylinder. filling based on the highest of WR-421 or the active Chameleon.
28.
Leave the PP-8 cvacuation valve open for a bou t ; e t a n *
='8-
_. _ _ 86 07:561 P14 LLLIED-ENG. MTLS. 5ECTOR-METROPOLIS, IL-618 524 2111 P.14/.
residual EF impurity fros the cylinder.
29.-
Close the cylinder tralve using the 110 foot-pound torque wrench.
Stop closing the valve when the torque wrench " clicks".
Allow the pigtail to evacuate through PP-8 for at lesst two minutes.
l 30.
When pigtail evacuation is complete, close the pigtail evacuation line and.then open it slightly.
Disconnect the pigtail fron 'the cylinder and lay the pigtail down leaving heaters plugged in.
Proper safety gear is l
leather gloves and an operating vacuum hose.
Disconnect the pigtail from the filling manifold and replace the cap on the manifold.
Leave the PP-S valve open.
31.
During routine operations, another tared and evacuated cylinder will be in place and ready to fill.
Record the actual ending full time, the elapsed fill time, and the final weight from WR-421 (before Durping) on the
" Distillation Cylinder Fill Record" in columns 5, 6, and 7 respectively.
Also record the final totalized flow values l
(Register 508) f rom Chameleon A & B in -
columns.9 and 10 r0Jpectively.
Return to step "8" and proceed as usual.
32.
This cylinder is now ready to be initial weighed and campled.
-mm p-l Doc 29,86.09:00 ALLIED-ENG. MTLS. SECTOR-METROPOLIS, IL-618 524 2111 P.15/h, i
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l 33.
Initial weigh the cylinder with the j
Port-A-Weigh scale which is built into the 1
cylinder strong back.
Subtract the i
historical te,re weight and record the initial
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net weight of UF6 in column 8 of'the j
" Distillation Cylinder Fill Record".
See Section 5.0 Part F for Port-A-Weigh l
instructions.
34.
Prepare the cylinder for samplfng.
See Section 2.0 Part C for cylinder sampling procedures and final weighing ir.structions.
Record the final net weight of UP, as 6
determined by the beam scale gross weight less the historical tare weight of.the:
cylinder, in column S of the " Distillation Cylinder Fill Record".
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B.
Cylinder Weighing i
1.
This is a general outline of the various
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weighing procedures used for weighing UF6 cylinders.
A detailed procedure follows.
2.
There are four types of weights obtained on f
UF6 cylinders.
They are historical tare, tare, initial and gross weights.
Each weight serves a different purpose and they are explained below.
a.
Historical tare This is the weight of an evacuated UF6 cylinder before it is filled for the i
first time following manufacture or j
washing.
This weight is used along with the tare weight to determine the weight of the heel.
It is used with the gross I
weight to determine the total weight of UF6 in the cylinder.
b.
Tare This is the weight of an evacuated UF 6 cylinder immediately prior to filling.
)
For new or clean cylinders, the historical tare and tare are the same.
The tare is used along with the gross weight to determine the amount of UF 6 4
filled into the cylinder in order to determine production.
Tare weight is b
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Model 44 (10-Ton) Cylinder Pill Procedure the basic fill procedure given in Section 2.0, Part E.
Section 1 can be used for filling 10-Ton UF6 cylinders.
Due to the different target weights involved, however, some additional preparations must be made prior to fillkHJ 10-Ton cylioders.
Preparation n
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1.
Accumulate 10-ton cylinders until there are several to fill.
These should be filled in succession.
2.
Clear all 14-Ton cylinders out of all fill positions after filling and sampling in the normal manner.
3 Put the distillation system on total recycle.
4.
Have maintenance readjust the load cell (WR-421-I through WR-421-4) alarms to the Allied 10-Ton target weight of 19,500 lbs and also readjust the UP6 flow totalizor high weight alarm to 19,500 lbs.
5.
Test the alarms to ensure that they operate properly.
6.
Tare, connect, and fill the cylinders per the fill procedures outlined in Section 2.0.
7.
Initial weight, sample, and move the cylinders to
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the cooling area per the procedures outlined in Section 2.0.
8.
Fill all 10-Ton cylinders in succession.
No other,
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types of' cylinders are to be filled while filling 10-Ton cylinders.
9.
Nave maintenance readjust the high weight alares on the load cells (WR-421-1 through WR-421-4) and the high weight alara on the UF6 flow totalizer to l
_26,000 lbs.
10.
Test all alata to ensure that they operate properly.
11.
Begin preparing 14 -Ton cylinders for filling per the procedure in Section 2.0.
I NOTF;r Do not fill 10. ton cylinders without i
authorization from the UF6 general l
foreman and Distillation Technical Supervisor.
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'l RETENTION OF DOCUMENTS:
l Allied Chemical maintains the following records of weighings:
Scale Log Bocik: A log book is kept by the weighing operator.
In this book is recorded, with appropriate dates and shifts, all scale calibration check -
j weighings, working weight official weighings, both tare and filled cylinder i
weighings together with the cylinder numbers, and any pertiner.t remarks con-cerning scale conditions, scale calibrations, scale cleanings and adjustseents or other weighing activities.
All scale. log books and stand,ard weight cal-ibration records are maintained intact for at'least one year after completion for possible review. No scale log book is destroyed until after acceptance l
by all parties of the weight of any given cylinder of UF, even though such 6
acceptance may exceed one year.
Printed Weigh Tickets: Each completed tare weighing and filled cylinder
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weighing is printed on weigh tickets. These tickets, showing dates cylinder number,. weight, and scale operator's name, are forwarded daily to the' Plant Controller where the information is checked and recorded on permanent. records.
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- ... e AUDITS AND DfX.9tENTATION
' This proced'are shall' be audited on an annual basis or as necessary d ue-to changes in procedure, equipsnent, and personnel.
The. auditor shall insure that the qualification list is current and that all procedures h ave been revised to reflect any changes made since the previous audit.
A statement of audit shall be maintained with the original copy of thi s
Procedure as proof that the audits are being performed as prescribed The statement shall contain the name of the auditor and date of au shall be signed by the auditor.
The audit shall. be performed by the technical supervisor in charg e of the
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I Quality Assurance program or his designated representative.
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