ML20203A333
| ML20203A333 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 01/28/1999 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20203A320 | List: |
| References | |
| NUDOCS 9902090338 | |
| Download: ML20203A333 (15) | |
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FHVES ;
3.7.13 ;
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. . SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY i
SR 3.7.13.1 Verify required FHVES train in operation. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SR 3.713.2 Operate required FHVES train for > 10 continuous hours 31 days with the heaters operating.
SR 3.7.13.3 Pedorm required FHVES filter testing in accordance with in accordance with !
the Ventilation Filter Testing Program (VFTP). the VFTP l SR 3.7.13.4 Verify one FHVES train can maintain a pressure 18 months on a ,
s -0.25 inches water gauge with respect to atmospheric STAGGERED ;
pressure during operation at a flow rate s 8 2 cfm. TEST BASIS ,
6,MO SR 3.7.13.5 Verify each FHVES filter bypass darnper can be closed. 18 months i
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Catawba Units 1 and 2 3.7.13-2 Amendment Nos.
9902090338 990128 i PDR ADOCK 05000413 C P PDR i
FHVES B 3.7.13 I
... B 3,.7 PLANT SYSTEMS B 3.7.13 Fuel Handling Ventilation Exhaust System (FHVES)
BASES BACKGROUND The FHVES filters airborne radioactive particulates from the area of the fuel pool following a iuel handling accident. The FHVES, in conjunction with other normally operating systems, also provides environmental control of temperature and humidity in the fuel nool area. .
GM +w0-f,1+e-c v d,+.t p f ra Q The FHVES consists of two independent and redundant trainsf Each 7 ,lb 74- nsists of a heater, a prefilter,g high efficiency particulate air (HEPA) filte8, an activated carbon adsorber section for removal of gaseous activity (principally iodines), and a fan. Ductwork, valves or dampers, and inctrumentation also form part of the system. A second bank of HEPA filters follows the adsorber section to collect carbon fines and provide backup in case the main HEPA filter bank fails. The downstream HEPA filler is not credited in the analysis, but serves to collect carbon fines, and to back up the upstream HEPA filter should it develop a leak. The system initiates filtered ventilation of the fuel handling building following receipt of a high radiation signal.
The FHVES train does not actuate on any signal. One train is required to be in operation whenever irradiated fuel is being moved in the fuel handling building. The ope. ration of one train of FHVES ensures,if a fuel handling accident occurs, ventilation exhaust will be filtered before being released to the environment. The prefilters remove any large particles in the air, and any entrained water droplets present, to prevent excessive loading cf the HEPA filters and carbon adsorbers.
The FHVES is discussed in the UFSAR, Sections 6.5,9.4, and 15.7 '
i (Refs.1, 2, and 3, respectively) because it may be used for normal, as well as atmospheric cleanup functions after a fuel handling accident in the spent fuel pool area.
APPLICABLE The FHVES design basis is established by the consequences of SAFETY ANALYSES the limiting Design Basis Accident (DBA), which is a fuel handling l accident. The analysis of the fuel handling accident, given in Reference 3, assumes that all fuel rods in an assembly are damaged.
The DBA analysis of the fuel handling accident assumes that only one
( Catawba Units 1 and 2 B 3.7.13-1 Revision No%
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FHVES ;
B 3.7.13 I BASES APPLICABLE SAFETY ANALYSES (continued) train of the FHVES is OPERABLE and in operation. The amount of fission products available for release from the fuel handling building is I determined for a fuel handling accident. These assumptions and the l analysis follow the guidance provided in Regulatory Guide 1.25 (Ref. 4). l The FHVES satisfies Criterion 3 of 10 CFR 50.36 (Ref. 5).
i LCO One train of the FHVES is required to be OPERABLE and in operation whenever irradiated fuel is being moved in the fuel handling building. ,
Total system failure could result in the atmospheric release from the fuel handling building exceeding the 10 CFR 100 (Ref. 6) limits in the event of a fuel handling accident.
1 The FHVES is considered OPERABLE when the individual components l necessary to control exposure in the fuel handling building are j OPERABLE. An FHVES train is considered OPERABLE when its j associated: -
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- a. i OPERABLE;
- b. HEPA filte@nd carbon adsorbedre not excessively restricting flow, and are capable of performing their filtration function; and
APPLICABILITY During movement of irradiated fuelin the fuel handling area, the FHVES is required to be OPERABLE and in operation to alleviate the consequences of a fuel handling accident.
ACTIONS Al Required Action A 1 is modified by a Note indicating that LCO 3.0.3 does
- not apply.
I With the movement of irradiated fuel in the fuel handling building, one train of FHVES is required to be OPERABLE and in operation. The movement of irradiated fuel must be immediately suspended, if the train Catawba Units 1 and 2 B 3.7.13-2 Revision No(f)
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FHVES B 3.7.13 BASES SURVEILLANCE REQUIREMENTS (continued)
SR 3.7.13.3 This SR verifies that the required FHVES testing is performed in accordance with the Ventilation Filter Testing Program (VFTP). The FHVES filter tests are in accordance with Regulatory Guide 1.52 (Ref. 7).
The VFTP includes testing HEPA filter performance, carbon adsorber officiency, minimum system flow rate, and the physical properties of the ;
activated carbon (general use and following specific operations). Specific j test frequencies and additional information are discussed in detail in the l VFTP. I i
SR 3.7.13.4 l l
This SR verifies the integrity of the fuel building enclosure. The ability of the fuel building to maintain negative pressure with respect to potentially i uncontaminated adjacent areas is periodically tested to verify proper function of the FHVES. During operation, the FHVES is designed to ;
maintain a slight negative pressure in the fuel building, to prevent unfiltered LEAKAGE. The FHVES is designed to maintain s -0.25 inches water gauge with re t to atmospheric pressure at a flow rate of The Frequency of 18 months (on a l 1
[MsN 18 2 cfmGo t e fuefbuil STAGGERED TEBT BASI is consistent with the guidance provided in I
1 50 ~ UREG-0800, Section 6.5.1 (Ref. 8).
SR 3.7.13.5 Operating the FHVES filter bypass damper is necessary to ensure that the system functions properly. The OPERABILITY of the FHVES filter bypass damper is verified if it can be manually closed. An 18 month Frequency is consistent with Reference 8.
Catawba Units 1 and 2 B 3.7.13-4 Revision Noh I
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ATTACEMBET 2 ;
- REPRINTED TECHNICAL SPECIFICATICBIS PAGES FOR CATAWRh a
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I FHVES 3.7.13 i
,, , SURVEILLANCE REQUIREMENTS i SURVEILLANCE FREQUENCY SR 3.7.13.1 Verify required FHVES train in operation. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> l
SR 3.7.13.2 Operate required FHVES train for 210 continuous hours 31 days with the heaters operating.
' SR 3.7.13.3 Perform required FHVES filter testing in accordance with in accordance with the Ventilation Filter Testing Program (VFTP). the VFTP l SR 3.7.13.4 Verify one FHVES train can maintain a pressure 18 months on a .
! s -0.25 inches water gauge with respect to atmospheric STAGGERED !
l pressure during operation at a flow rate s 36,443 cfm. TEST BASIS l l
SR 3.7.13.5 Verify each FHVES filter bypass damper can be closed. 18 months !
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i Catawba Units 1 and 2 3.7.13-2 Amendment Nos.
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FHVES !
B 3.7.13 - !
,, , B 3,7, PLANT SYSTEMS l
B 3.7.13 Fuel Handling Ventilation Exhaust System (FHVES)
BASES 1
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~ BACKGROUND The FHVES filters airt>orne radioactive particulates frorn the area of the I fuel pool following a fuel handling accident. The FHVES, in conjunction with other normally operating systems, also provides environmental control of temperature and humidity in the fuel pool area.
The FHVES consists of two independent and redundant trains with two filter units per train. Each filter unit consists of a heater, a profilter, high efficiency particulate air (HEPA) filters, an activated cart >on adsort>er section for removal of gaseous actMty (principally lodines), and a fan.
Ductwork, valves or dampers, and instrumentation also form part of the system. A second bank of HEPA filters follows the adsort>er section to collect carbon fines and provide backup in case the main HEPA filter bank fails. The downstream HEPA filter is not credited in the analysis, but serves to collect carbon fines, and to back up the upstream HEPA
- filter should it develop a leak. The system initiates filtered ventilation of the fuel handling building following receipt of a high radiation signal.
The FHVES train does not actuate on any signal. One train is required to be in operation whenever irradiated fuel is being moved in the fuel handling building. The operation of one train of FHVES ensures,if a fuel handling accident occurs, ventilation exhaust will be filtered before being released to the environment. The profilters remove any large particles in the air, and any entrained water droplets present, to prevent excessive loading of the HEPA filters and carbon adsorbers.
The FHVES is discussed in the UFSAR, Sections 6.5,9.4, and 15.7 (Refs.1,2, and 3, respectively) because it may be used for normal, as well as atmospheric cleanup functions after a fuel handling accident 'n the spent fuel pool area.
I APPLICABLE The FHVES design basis is established t'y the consequences of SAFETY ANALYSES the limiting Design Basis Accident (DBA), which is a fuel handling accident. The analysis of the fuel handling accident, given in l Reference 3, assumes that all fuel rods in an assembly are damaged. l The DBA analysis of the fuel handling accident assumes that only one I
Catawba Units 1 and 2 B 3.7.13-1 Revision No.1 l
l FHVES i B 3.7.13 - i BASES !
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- APP'LICABLE SAFETY ANALYSES (continued) l l train of the FHVES la OPERABLE and in operation. The amount of l fission products available for release from the fuel handling building is {
determined for a fuel handling accident. These assumptions and the :
analysis follow the guidance provided in Regulatory Guide 1.25 (Ref. 4). l The FHVES satisfies Criterion 3 of 10 CFR 50.36 (Ref. 5). l l i LCO One train of the FHVES is required to be OPERABLE and in operation whenever irradiated fuel is being moved in the fuel handling building. i Total system failure could result in the atmospheric release from the fuel :
handling building exceeding the 10 CFR 100 (Ref. 6) limits in the event of ;
a fuel handling accident. j l The FHVES is considered OPERABLE when the individual components }
l necessary to control exposure in the fuel handling building are OPERABLE. An FHVES train is considered OPERABLE when its !
associated: j l
Fans are OPERABLE;
- a. l
- b. HEPA filters and carbon adsorbers are not excessively restricting l flow, and are capable of performing their filtration function; and j
APPLICABILITY During movement of irradiated fuel in the fuel handling area, the FHVES !
is required to be OPERABLE and in operation to alleviate the consequences of a fuel handling accident.
ACTIONS M Required Acticn A.1 is modified by a Note indicating that LCO 3.0.3 does l not apply.
With the movement of irradiated fuel in the fuel handling building, one i train of FHVES is required to be OPERABLE and in operation. The movement of irradiated fuel must be immediately suspended, if the train l,
i l Catawba Units 1 and 2 B 3.7.13-2 Revision No.1 l
s FHVES i B 3.7.13 BASES #
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SURVEILLANCE REQUIREMENTS (continued) i SR 3.7.13.3 '
This SR verifies that the required FHVES testing is performed in accordance with the Ventilation Filter Testirig Program (VFTP). The FHVES filter tests are in accordance with Regulatory Guide 1.52 (Ref. 7).
The VFTP includes testing HEPA filter performance, carbon adsorber efficiency, minimum system flow rate, and the physical properties of the activated carbon (general use and following specific operations). Specific -
test frequencies and additional information are discussed in detail in the VFTP. '
j SR 3.7.13.4 This SR verifies the integrity of the fuel building enclosure. The ability of ;
the fuel building to maintain negative pressure with respect to potentially ;
uncontaminated adjacent areas is periodically tested to verify proper j function of the FHVES. During operation, the FHVES is designed to )
maintain a slight negative pressure in the fuel tuilding, to prevent i unfiltered LEAKAGE. The FHVES is designed to maintain s -0.25 inches water gauge with respect to atmospheric pressure at a flow rate of s 36,443 cfm. The Frequency of 18 months (on a STAGGERED TEST l BASIS) is consistent with the guidance provided in NUREG-0800, Section 6.5.1 (Ref. 8). j I
SR 3.7.13.5 l l
Operating the FHVES filter bypass damper is necessary to ensure that l
the system functions properly. The OPERABILITY of the FHVES filter i bypass damper is verified if it can be manually closed. An 18 month {
Frequency is consistent with Reference 8.
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Catawba Units 1 and 2 B 3.7.13-4 Revision No.1 l
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j DESCRIPTION OF PROPOSED CHANGES AND TECHNICAL JUSTIFICATION
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l l Description of Proposed Changes and Technical Justification T5 3.7.13 delineates requirements for the FHVES at Catawba.
The FHVES filters airborne radioactivity from the fuel pool area following a postulated fuel handling accident. The FHVES consists of two independent and redundant trains.
l Each train, in turn, consists of two 50% capacity filter units. Each filter unit consists of a heater, a prefilter, high efficiency particulate air (HEPA) filters, an activated carbon adsorber section for removal of radioactivity, and a fan. The FHVES is depicted in Figure 9-118 of the Catawba UFSAR.
SR 3.7.13.4, as presently written, requires verification that each FHVES train can maintain the required pressure (5
-0.25 inches water gauge with respect to atmospheric l pressure) during operation at a flowrate 5 18,221 cfm. This SR is incorrect as written, because the flowrate specified l is actually that through a single filter unit / fan combination (one-half of one train). The FHVES is not j tested on a per filter unit / fan basis; it is tested on a per i train basis. Therefore, there is a compliance problem with I this SR as presently written. Under Catawba's previous TS, prior to implementation of the Improved TS, a compliance problem did not exist, because there was no numerical value for flowrate embedded in the SR itself. During development i of Improved TS SR 3.7.13.4, the flowrate value utilized in the SR should have been that for a complete FHVES train, since the SR is performed on a per train basis.
This amendment request modifies the flowrate specified in SR 3.7.13.4 so that it is representative of an entire FHVES train. The per train flowrate for the FHVES to be input into SR 3.7.13.4 is:
16,565 cfm per filter unit / fan x 2 filter units / fans per FHVES train x 110% = 36,443 cfm In addition, appropriate changes are made to the SR 3.7.13.4 Bases to reflect this proposed change. Finally, changes are made to the Bases to reflect the fact that each train of FHVES actually contains two complete filter units and two fans. Refer to the TS 3.7.13 markups for the changes.
l These revised requirements are consistent with the design l and operation of the FHVES at Catawba.
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I ATTACHMENT 4 NO SIGNIFICANT HAf.ARDS CORISIDERATION DETERMINATION 1
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l No Significant Hazards Consideration Determination The following discussion.is a. summary of the evaluation of !
the changes contained in this proposed amendment against the i 10-CFR 50.92(c) requirements to demonstrate that all three standards are satisfied. A no significant hazards i consideration is indicated if operation of the facility in i accordance with the proposed amendment would not: .
- 1. Involve a significant increase in the probability or 1
consequences of an accident previously evaluated, or :
- 2. Create the possibility of a new or different kind of !
accident from any accident previously evaluated, or ;
- 3. Involve a significant reduction in a margin of safety.
First Standard Implementation of this amendment would not involve a significant increase in the probability or consequences of ;
an accident previously evaluated. Approval of this '
amendment will have no eff+ct on accident probabilities or consequences. The FHVES A4 not an accident initiating system; therefore, there will be no impact on any accident probabilities by the. approval of this amendment. The design of the system is not being modified by this proposed !
amendment. The amendment merely aligns TS requirements with the existing design and function of the system. Therefore, there will be no impact on any accident consequences.
Second Standard Implementation of this amendment would not create the possibility of a new or different kind of accident from any accident previously evaluated. No new accident causal mechanisms are created as a result of NRC approval of this i amendment request. No changes are being made to the plant i which will introduce any new accident causal mechanisms. i This amendment request does not impact any plant systems that are accident initiators; neither does it impact any accident mitigating systems.
Third Standard Implementation of this amendment would not involve a significant reduction in a margin of safety. Margiu of safety is related to the confidence in the ability of the i fission product barriers to perform their design functions during and following an accident situation. These barriers t
include the fuel cladding, the reactor coolant system, and
.the containment system. The performance of these fission
- 'oduct pr barriers will not be impacted by implementation of this proposed amendment. The FHVES is already capable of performing as designed. No safety margins will be impacted.
Based upon the preceding analysis, Duke Energy has concluded that the proposed amendment does not involve a significant hazards consideration.
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ATTACIDENT 5 ENVIRO!OODITAL ANALYSIS I
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F~ l l Environmental Analysis i
-Pursuant to 10 CFR 51.22 (b) , an evaluation of this license amendment request has been performed to determine whether or l not it meets the criteria for categorical exclusion set l- forth in 10 ' CFR 51.22 (c) (9) of the regulations.
This amendment to the Catawba TS modifies requirements for i the FHVES to align these requirements with the design and l function of the system. Implementation of this amendment i will have no adverse impact upon the Catawba units; neither I will it contribute to any additional quantity or type of effluent being available for adverse environmental impact or l
personnel exposure.
It has been determined there is:
- 1. No significant hazards consideration, l
- 2. No significant change in the types, or significant increase in the amounts, of any effluents that may be released offsite, and
- 3. No significant increase in individual or cumulative occupational radiation exposures involved.
l Therefore, this amendment to the Catawba TS meets the criteria of 10 CFR 51.22 (c) (9) for categorical exclusion from an environmental impact statement.
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