ML20203K426
| ML20203K426 | |
| Person / Time | |
|---|---|
| Site: | Paducah Gaseous Diffusion Plant |
| Issue date: | 02/25/1998 |
| From: | John Miller UNITED STATES ENRICHMENT CORP. (USEC) |
| To: | Paperiello C NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| GDP-98-0023, GDP-98-23, NUDOCS 9803050082 | |
| Download: ML20203K426 (27) | |
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USEC A Clobal Energy Company JAMES H. MILLER Dir: (301) 564-3309 VicE PRESIDENT, PRODUCTION Far (301) 571-8279 February 25,1998 i
GDP 98-0023 Dr. Carl J. Paperiello Director, Office of Nuclear Material Safety and Safeguards Attention: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Paducah Gaseous Diffusion Plant (PGDP)
Dockei No. 70-7001 Transmittal of Revision 23 to Paducah Certification Application
Dear Dr. Paperiello:
l In accordance with 10 CFR Part 76, the United States Enrichment Corporation (USEC) hereby submits twenty (20) copies of Revision 23 (February 25,1998) to USEC-01, Application for United States Nuclear Regulatory Commission Certification, Paducah Gaseous Diffusion Plant.
Revision 23 incorporates changes to the Technical Safety Requirements (TSR) and Safety Analysis Report (SAR). These changes were previously submitted for your review in accordance with 10 CFR 76.45 and were approved as Amendment 14 to the Certilicate of Compliance GDP-1 in your letter dated January 26,1998 (TAC NO, L32046). Revision bars are provided in the right-hand margin to identify the changes. Revision 23 was implemented on February 25,1998.
Should you have any questions or comments on Revision 23, please call me at (301) 564-3309 or Steve Routh at (301) 564-3251. The enclosure identifies commitments made in this submittal.
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PDR dge Drive. Bethesda. MD 20817-1818 om.u Telephone 301-564-3200 Fax 301-564 3201 http://www.usce.com Omces in 1.ivermore, CA Paducah, KY Portsmouth, OH Washington, DC
4 Dr. Carl J. Paperiello February 25,1998 GDP 98 00.13, Page 2
Enclosures:
1.
Affidavit 2.
USEC-01, Application for United States Nuclear Regulatory Comrnission Certification, Paducah Gaseous Diffusion Plant, Revision 23, Copy Numbers
$67 through 586 cc: NRC Region til Office Copy Numbers 442,664 I
NRC Resident Inspector - PGDP Copy Number 697 NRC Resident inspector - PORTS Copy Number 665 Mr. Joe W. Parks (DOE)
Copy Numbers 641 through 644 l
l l
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OATil AND AFFIRMATION 1, James II. Miller, swear and affirm that I am Vice President, Production, of the United States Ennchment Corporation (USEC), that I am au6iorized by USEC to sign and file with the Nuclear Regulatory Commission this Revision 23 of the USEC Application for United States Nuclear Regulatory Commission Certification, Paducah Gaseous Diffusion Plant (USEC-01), that I am familiar with the contents thereof, and that the statements made and matters set forth therein l
are true and correct to the best of my knowledge, infomtation, and belief.
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On this 25th day of February,1998, the officer signing above personally appeared before me, is known by me to be the person whose name is subscribed to within the instrument, and acknowledged that he executed the same for the purposes therein contained.
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. $Mul M AL<2fu o.-
I!aurie M. Knirley, Notary Public j
State of Maryland, Montgomery County My commission expires March 17,1998
GDP 98-0023 USEC-01 Application for United States Nuclear Regulatory Contmission Certification Paducah Gaseous Diffusion Plant, Revision 23 4
n APPLICATION FOR UNITED STATES NUCLEAR REGULATORY COMMISSION CERTIFICATION PADUCAH GASEOUS DIFFUSION PLANT REMOVE / INSERT INSTRUC"3NS REVISION 23 FEBRUARY 25,1998 Remove Pages Insert Pages VOLUMEI List of Effective Pages List of Effective Pages LOEP-1/LOEP-2, LOEP-5/LOEP-6, LOEP-1/LOEP-2, LOEP-5/LOEP-6, LOEP-7/LOEP-8 LOEP-7/LOEP 8 Section 3.6 Section 3.6 3.6-9/3.6-10,3.6-17/3.6-18 3.6-9/3.6-10,3.6-17/3.6-18 Section 3.15 Section 3.15 3.15-25/3.15-26 3.15-25/3.15-26 VOLUME 2 IJst of Effective Pages List of Effective Pages LOEP-1/LOEP-2, LOEP-5/LOEP6, LOEP-1/LOF.P-2, LOEP 5/LOEP6, LOEP-7/LOEP-8 LOEP-7/LO:lP-8 VOLUME 4 List of Effective Pages List of Effective Pages ii ii 4
Section 2.1 Section 2.1 2.1-13,2.1-14,?. 1-15.2.1-16 2.1-13.2.1-14.2.1-15,2.1-16
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Rev. 23 d
As a result, high conductivity will oe detected which will operate an interlock system to put the autoclave into containment.
3.6.7.2 UF. Detection Each autoclave, the laboratory room, and the basement area in C-360 are equipped with general area UF detectors. 'Ihe UF. release detection systems are arranged in zones. Zone 1 is the laboratory area, Zoi.es 2 and 3 are the autoclave heads, Zone 4 is the basement area, and Zones 5-8 are the autoclave heated housings. Figure 3.6-5 provides a simplified schematic of the UF. release detection systems.
The laboratory area (Zore 1) contains two UF. detectors. When either detector is activated, the associated circuitry initiates closing the UF. sample line isolation valves, XV *48 and XV *51, closing the UF. transfer line isolation valves, FV *47, XV *49, XV *50, and XV *52, and sounding of alarms.
This isolates all sample cabinets from their corresponding autoclave. The alarms sound at the local autoclave panel, the C 360 supervisor's office, and in the CCF in C-300. The Zone I detection system does not initiate building containment.
Detector heads in the basement area (Zone 4) are located above the receiving cylinder pigtail, cold trap, the relief tanks, surge drums and on the ceiling in the transfer room. When any of these detector heads is actuated, the associated circuitry initiate closing the UF. transfer sample line and transfer line block valves on all autoclaves (FV *47, XV *49, XV *50 and XV *S2), c!osing the transfer line block valve WV-042, closing the receiving cylinder valve, actuating building contcinment which allows the automatic door closures on the drain station enclosure to close, providing confinement, and sounding l(o')
a' arms. The Zone 1 and portions of the Zone 4 detection systems are identified as systems required to be included in the TSR. The portion of the Zone 4 system includes only those detector heads located within the transfer room.
The Zones 2 and 3 UF. detection systeins are located above the autoclave heads. Zone 2 consists of the detectors over autoclaves 1 and 2, and Zone 3 consists of the detector heads over autoclaves 3 and 4.
If either detector head in a zone actuates, automatic transfer isolation valves close on the two autoclavea associated with that zone only. Actuation of the Zone 2 or 3 detection system also initiates building containment and initiates alarms sounding in the C-360 supervisor's office, and in t' : CCF in C-300.
Zones 5-8 consists of the detector heads sampling the heated housing of each autoclave. Alarms and the closure of the steam supply isolation valves are initiated. The alarms sound in the C-360 supervisor's office, and in the CCF in C-300.
There is a :ime delay of 45 seconds between actuation of a PGLD head sending the building into containment and the closure of the overhead doors. Alarms sound to alert operators that the doors will close. The time delay allows the continued movement of the crane or scale carts to get out of the path of the closing doors.
The cylinder valve closer is air operated with a nitrogen backup. On loss of plant air or low plant air pressure, a pressure switch on the air supply line (set at or above 75 psig) actuates to open a solenoid valve which makes nitrogen available to the air supply line. The cylinder valve can be closed by the p
3.6-9 1
9 SAR PGDP November 20,1997 Rev. 20 nitrogen in 30 seconds. The nitrogen connection to the air supply line is made downstream from a check valve in the line which prevents loss of nitrogen pressure. The nitrogen bottle which supplies the system with backup nitrogen is a 1.55 ft' tank and must have an indicated pressure of at least 1200 psig. The nitrogen is regulated to an indicated 80 psig.
Check valve operability is verified during quarterly testing by monitoring for detectable flow from tubing located upstream from the check valve that is open to atmosphere open to atmosphere (no detectable flow after nitrogen has been supplied to the supply header down stream from the check valve indicates the valve has seated properly). Another indication of proper check valve performance is closing a cylinder valve using the nitrogen backup (also part of the quanerly test). If the cylinder valve will close within the required 30 seconds using nitrogen, then the check valve is providing sufficient resistance to backflow for the system to function properly if called upon to do so.
3.6.7.3 Water Inventory Control As mentioned in Section 4.2.3, the maximum pressure generated in an autoclave from an accidental UF. release and subsequent reaction with the available water is best contrclled by limiting the water in the autoclave. Redundant condensate level probes LE *07 and LE *08 are mounted in the 3-in. drain pipe slightly below the autoclave level. A strainer basket is placed over the drain pipe to prevent trash from blocking the drain line. If the ultrasonic probes detect a high water level, the steam supply isolation valves XV *S3 and FV *05 and the thermovent line t. lock valve FV *34 close to limit the total water in the autoclave. This system has been designated a system required to be.'Cuded in the TSR (see Figure 3.6-3).
3.6.7,4 Autoclave Steam Pressure Control The autoclave steam pressure control system is used to stop the steam flou to the autoclave while heating a cylinder prior to reaching temperatures which could result in reaching the maximum allowable working pressure of the cylinder. This system is identified as a system required to be included in the TSR. The steam pressure control system closes the steam isolation valves and sounds an alarm if the autoclave steam pressure reaches the set point of a maximum of 8 psig. The components of this system are the pressure transmitter PT *15 and associated pressure switch PSH *15A, pressure switch PSH.*15B, steam supply isolation valves XV *53 and FV *05, associated relays, solenoids and switches (see Figures 3.6-3 and 3.6-4).
3.6.7,5 Autoclave High Pressure Isolation System The autoclave high pressure isolation system causes the autoclave to go into the containment mode and sound an alarm if the internal pressure of the autoclave reaches 15 psig. In addition, the system disables the hydraulic system required to open the autoclave shell preventing the autoclave from opening until the alarm condition has been cleared. This system is identified as a system required to be included in the TSR. The system components include the autoclave shell, head, and locking ring, pressure transmitter PT *15 and associated pressure switch PSHH *15A, pressure blind switch PSHH *15B, 3.6-10
l SAR.PGDP i
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4 EAR PGDP February 25,1998 Rev. 23 3.15.1.4.5 tiF Release *:<tection System - Laboratory Area (Zone 1) l 0 Function The UF. release detection system provides the means to detect g UF release in the sampling laboratory area. The system function is to isolate the sampling manifold from the parent cylinder by closing the sampling valves and end the release.
See Section 3.6.7.2 for a descript.on of this system.
Boundan-The system boundaries include:
1.
Two UF. detector heads located in the laboratory area, YE-005A and YE.00$B 2.
UF. detector control pmel 3.
Sample line isolation valves and transfer line isolation valves l
4.
Solenoid valves, and associated c!rcuitry to close the valves.
p 5.
Alarms and associated alarm circuitry d
3.15.1.4.6 UF Release Detection System - Transfer Room (Portions of Zone 4) 0.Funcdon The UF. release detection system provides the means to detect a Uf release in the transfer room when either of the two heads detect UF.. The system function is to automatically isolate the drain manifold from the parent cylinder by closing the block valves and automatically isolate the cylinder by closing the cylinder valve. (Buildii.; containment is also actaated but is not a credited Q function.)
See Section 3.6.7.2 for a description of this system.
Boundan-The system boundsries include:
1.
UF detector heads located in the transfer room 2.
Autoclave drain line block valves 3.
Transfer line block valves and transfer sample line block valves l
4.
Cylinder valve closer 3.15 25
SAR PODP May 31,1996 Rev.3 5.
Backup N supply 3
6.
Associated solenoid valves and circuitry to close the valves.
7.
Alarms and associated alarm circuitry The Q systems in those areas are described in Section 3.6.'s.
3.15.1.4.7 UF. Release Detection System - lleated IIct"' ags (Zones 5'8)
O Function
}
The UF. release detection system provides the means to detect a UF release in the heated housing.
The system function is to detect a UF. release and alarm. (The system also closes the steam supply isolation valves, but this is not part of its Q function.)
See Section 3.6.7.2 for a description of this system.
Boundary The system boundaries include:
1.
UF detector heads located near the heated housing 2.
Alarms in the C 360 supervisor's office and C 300 3.
Associated alarm circuitry 3.15.1.4.8 Scale Cart Movement Prevention System
- aY O Function The scale cart movement prevention system prevent moving a scale cart with a pressurized pigtail attached.
See Section 3.6.9.1 for a description of this system.
Boundary The system boundary includes:
1.
Differential pressure sensors 2.
Solenoid valves 3.15 26
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CT)
TSR PGDP Rbruary 25.1998 Rev.23 w
SECTION 2.1 SPECIFIC TSRs FOR TOLL TRANSFER AND SAh1PLING J
FACILITY (C-360) 2.1.4 GENERAL LIhtITING CONDITIONS FOR OPERATION 2.1.4.1 UF. RELEASE DETECTION SYSTEM LABORATORY (ZONE ?)
LCO 2.1.4.1: Zone 1 (Laboratory) of the UFe, release detecolon system shall be operable.
APPLICABILITY: Modes: 7 ACTIONS:
Condition Required Actior.
Completion Time A.
One Zone I detector head A.1 Restore operability.
Prior to entering mode 7 on a NOTE: The existing operating cycle may le completed.
B.
Both Zone i detector heads B.1 Stop operations in mode 7. I hour inoperable.
M i
B.2 Evacuate sample manifold I hour (place the sample cabivt in mode 8 and the autoclave in mode 4).
'q C.
Valve XV *48 or XV *51 C.! Restore operability.
Prior to entering mode 7 on a J
new operating cycle.
NOTE: The existing operating cycle may be completed.
D.
Valve FV *47, XV *49 XV *S0, D.1 kestore operability. See Prior to entering mode 7 on a or XV *52 inoperable section 2.1.3.1 for impact new operating cycle on the autoclave.
NOTE: The existing coerating cycle may be complete'd.
E.
' Valves XV *48 and XV *51 E.1 Stop operations in mode 7 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> inoperable.
M E.2 Evacuate sample manifold Ihour (place thc sample cabinet in mode 8). See section 2.1.3.1 for impact on the autoclave.
F.
V.lve XV *49 inoperable F.1 Stop operations in mode ?
Ihour AND M
Either valve FV *47 XV *50 or F.2 Evacuate sample manifold Ihour l
XV *52 inoperable.
(place the sample cabinet in mode 8). See section 2.1.3.1 for impact on the autoclave.
2.1-13
TSR PGDP F:bruary 25,1998 Rev.23 SECTION 2.1 SPECIFIC TSRs FOR TOLL TRANSFER AND SAMPLING O
FACILITY (C-360) 2.1.4 GENERAL LIMITING CONDITIONS FOR OPERATION 2.1.4.1 UF, RELEASE DETECTION SYSTEM - LABORATORY (7.ONE 1)
(continued)
SURVEILLANCE REQUIREMENTS:
Surveillance Frequency SR 2.1,4.1-1 Test each Zone 1 UP. release detection head to Quarterly verify it will detect " smoke" and close the appropriate UF, manifold isolation valves (FV *47, l
XV *48, XV *49, XV *SO, XV *51, and XV *52).
BASIS:
The reaction of UF. and water (free atmospheric humidity) in the case of a UE release produces uranyl fluoride (UO F ) as particulates and hydrogen fluoride (HF) as a gas which will hydrate.
22 The UO F and IIF*x(H O) are highly visible as " smoke." This system detects the presence of 2
2
(~'
this " smoke" in the laboratory area and isolates the parent cylinder from the release point.
(
[SAR Section 4.3.5.1.1)
'Ihe functional test surveillance requirement associated with TSR 2.1.3.1 verifies valve closure times are within accident analysis assumptions on a quanerly basis. SAR Section 4.3.5.1.1 assumes the manifold valves will close in 10 seconds.
1 0
2.1-14
TSR-PGDP February 25,1998 Rev.23 e
SECTION 2.1 SPECIFIC TSRs FOR TOLL TRANSFER AND SAh!PLING FACILITY (C-360) 2.1.4 GENERAL LIhtITING CONDITIONS FOR OPERATION 2.1.4.2a UF, RELEASE DETECTION SYSTEM - BASEMENT TRANSFER ROOM (A PORTION OF ZONE 4)
LCO 2.1.4.2a: Zone 4 (Basement transfer room) of the UF release detection system shall be operable.
APPLICABILITY: Modes: 6B ACTIONS:
Condition Required Act on Completion Time i
A.
One basement transfer A.1 Restore operability.
Prior to entering mode 6B room detector head on a new operating cycle inoperable.
NOTE: The existing operating cycle may be with a new parent or completed.
daughter cylinder.
5.
IWh basement transfer B.1 Stop operations in mode 6B 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> room detector heads M
B.2 Evacuate transfer manifold (place the Ihour transfer station in mode 8),
bv B.3 Place the autoclave in mode 4.
I bour C.
Valve FV.*47, C.1 Restore operability.
Prior to entering mode 6B XV *49 XV *50 or on a new operating cycle XV *52 inoperable.
NOTE: The existing operating cycle may be with a new parent or completed.
daughter cylinder.
D.
Valve XV *$2 D.! Stop operations in mode 6B 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> inoperable M
AND D.2 Evacuate transfer manifold (place the I hour Either valve FV *47, transfer station in mode 8). See XV *49, or XV *50 2.1.3.1 for impact on the autoclave.
E, Valve WV 042 E.1 Stop operations in mode 6B 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> inoperable.
M E.2 Evacuate transfer manifold (p? ace the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> transfer station in mode 8)
M E.3 Place the autoclave in mode 4.
I hour F.
Receiving cylinder F.1 Stop operations in mode 6B 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> valve emergency valve M closer inoperable.
F.2 Close the cylinder valve manually I hour (valve closer may be removed)
M F.3 Evacuate transfer manifold (place the I hour trarsfer station in mode 8)
's /
F.4 Place the autoclave in mode 4.
I bour 2.1-15
_ ____ _ j
TSR PODP February 25, 1998 Rev. '23 SECTION 2.1 SPECIFIC TSRs FOR TOLL TRANSFER AND SAhtPLING O
FACILITY (C460) 2.1.4 GENERAL LIhtITING CONDITIONS FOR OPERATION 2.1.4.2a UF, RELEASE DETECTION SYSTEh! - BASEhfENT TRANSFER ROOh!
(A PORTION OF ZONE 4) (continued)
SURVEILLANCE REQUIREMEfTTS:
Surveillance Frequency SR 2.1.4.2a 1 Test each Zone 4 (basement transfer room)
Quarterly UF release detection head to verify it will 6
detect " smoke" and close the appropriate UF6 manifold isolation valves (FV *47, XV *49, XV *50, and XV *S2), the transfer line block valve (WV-042) and the receiving cylinder valve. The receiving cylind.:r valve must close within 30 seconds of detection.
SR 2.1.4.2a 2 Verify that nitrogen is av&ilable to power the Ouarterly receiving cylinder valve closer air motor in order to close the cylinder valve (pressure check).
SR 2.1.4.2a-3 Verify that the automatic transfer from plant Quarterly air to nitrogen is operable for the receiving cylinder valve closer.
SR 2.1.4.2a 4 Verify that tne check valve on the air supply Quarterly line to the transfer cylinder valve closer air motor just upstream of the nitrogen supply interface is operable.
I BASIS:
The reaction of UF.and water (free atmospheric humidity) in the case of a UV releas: produces uranyl fluoride (UO F ) as particulates and hydrogen fluoride (HF) as a gas which will hydrate.
22 The UO F and HF*x(H O) are highly visible as " smoke." This system detects the presence of 22 2
this " smoke" in the basement transfer room and isolates the parent and receiving cylinders from the mlease point. [SAR Section 4.3.5.1.1)
The receiving cylinder valve closer motor is driven by plant air and is backed up by bottled nitrogen in the event plant al-header pressure is Ic,w concurrent with a demand for receiving cylinder valve closure.
The functional test surveillance requirement associated with TSR 2.1.3.1 verifies valve closure times are within accident valysis assumptions on a quarterly basis. SAR Section 4.3.5.1.1 V
assumes the manifold valves will close in 10 seconds.
2.1-16 o