ML20096G721
| ML20096G721 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 05/11/1992 |
| From: | Chris Miller Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20096G724 | List: |
| References | |
| NUDOCS 9205260214 | |
| Download: ML20096G721 (17) | |
Text
_ ____ -_.
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je UNITED STATES g
g NUCLEAR REGULATORY COMMISSION E'
WASHINGTON, D. C 20$55
%*..../
PHILADELP4IA ELECTRIC COMPANY DOCKET N0. 50-352 LIMERICK GENERATING STATION. UNIT 1 MENDMENT TO FACILITY OPERATD;G -LICENSE Amendment No. 54 License No. NPF-39 1.
The Nuclear Regulatory Commission (the Commission) has found that:
A.. The application for amendment _by Philadelphia Electric Company (the licensee) dated March 3,1992, complies with the standards and requirements of the Atomic Energy Act of 1954, as aaended (the Act),
and the Commission's rules and regulations set forth in 10 CFR Chapter I; B.
The facility r:ill operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.
There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.
The issuance of this-amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.
2.
Accordingly, the license is amended by changes to the Technical Soecifications as indicated in the attachment to this license amendment, and paragraph 2.C.(2) of Facility Operating License No. NPF-39 is hereby amended to read as follows:
I l
9205260216 920511 PDR ADOCK 05000352 P
. Technical Specifications The Technical Specifications contained in Appendix A and the Environmental Protection Plan contained in Appendix B, as revised through Amendment No.
54. are hereby incorporated into this license.
Philadelphia Electric Company shall operate the facility in accordance with the Technical Specificatiores and the EnvironmentaT Protection Plan.
3.
This license amendment is effective as of its date of issuance.
FOR THE NUCLEAR REGULATORY COMMISSION cry h NY Charles L. Miller, Director Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Attachment:
Changes to the i
Technical Specifications Date-of Issuance:
May 11, 1992
l
-ATTACHMENT TO LICENSE AMENDMENT NO. 54 FACILITY OPERATING LICENSE NO. NPF-39
-DOCKET NO. 50-352 Replace the following pages o' the Appendix A Technical Specifications witn the attached pages. The revised pages are identified by Amendment number and contain vertical lines indicating the area of change. The overleaf page is provided to maintain document completeness.*
Remove Jngr_t 3/4 7-13 3/4 7-13 3/4 7-14 3/4 7-14 3/4 7-15 3/4 7-15 3/4 7-16 3/4 7-16 0 3/4-7-3 B 3/4 7-3 8 3/4 7-4.
B 3/4 7-4*
W m._.__
PLANT SYSTEMS 1
i SURVEll. LANCE REQUIREMENTS (Continued) e.
Functional Tests At least once per 18 months a representative sample of each type of snubber shall be tested using the following sample plans.
The sample plan (s) shall be selected for each type prior to the test period and cannot be changed during the test period.
The NRC Regional Administrator shall be notified in writing of the sample plan (s) selected for each type prior to the test period or the sample plan (s) used in the prior test period shall be implemented:
1)
At least 10% of the total population of a snubber type shall be functionally tested. For each snubber of that type that does not meet the functional test acceptance criteria of Specification 4.7.4f., an additional sample of at least 1/2 the size of the initial sample shall be tested until the total number tested is equal to the initial sample multiplied by the factor, 1+C/2, where C is the total number of unacceptable snubbers or until all the snubbers of that type have been tested; or 2)
A representative sample of 37 snubbers of a snubber type shall be functionally tested in accordance with Figure 4.7.4-1.
"C" is the total number of snubbers of that type found not meeting the acceptance requirements of Specification 4.7.4f.
The cumulative number of snubbers of the type tested is dsaoted by "H".
If at any time the point plotted falls in the " Accept" region, testing of snubbers of that type may be terminated. When the point plotted lies in the " Continue Testing" region, additional snubbers of that type shall be tested until the point falls in the " Accept" region, or all the snubbers of that type have been tested.
1 t
LIMERICK - UNIT 1 3/4 7-13 Amendment No.,26', 54 1l 1
PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) l The representative sample selected for the function test sample plans l
shall be randomly selected from the snubbers of each type and reviewed before beginning the testing. The review shall ensure as far as practical that they are representative of the various configurations, operating environments, range of size, and capacity of snubbers of that type.
Snubbers placed in the same locations as snubbers which failed in the previous functional test period shall be retested at the time of the next functional test period but shall not be included in the sample plan, and failure of this functional test shall not be the sole cause for increasing the sample size under the sample plan.
Testing equipment failure during functional testing may invalidate the day's testing and allow that day's testing to resume anew at a later time provided all snubbers tested with the failed equipment during the day of equipment failure are retested.
If during the functional testing, additional testino required due to failure of snubbers, the unacceptable snubbers mai atergorized into failure mode group (s). A failure mode group shali enclude all unacceptable snubbers that have a given failure mode and eli other snubbers subject to the same failure mode. Once a f aikre mode group has been established, it can be separated for continued testing apart from the general population of snubbers.
However, cll unacceptable snubbers in the failure mode group shall be counted as one unacceptable snubber for additional testing in the general population.
Testing in the failure mode group shall be based on the number of unacceptable snubbers and shall continue in accordance with the sample plan selected for the type or until all snubbers in the failure mode group have been tested.
Any additional unacceptable snubbers found in the failure mode group shall be counted for continued testing only for that test failure mode group.
In the event that a snubber (s) becomes included in more than one test failure mode group, it shall be cM nted in each failure mode group and shall be subject to the correctia action of each test failure mode group.
f.
Functional Test Acceptance Criteria The s~ubber functional test shall verify that:
1)
Activation (restraining action) is achieved within the specified range in both tension and compression; 2)
Snubber bleed, or release rate where required, is present in both tension and compression, within the specified range (hydraulic snubbers only);
3)
For mechanical snubbers, the force required to initiate or maintain motion of the snubber is within the specified range in both directions of travel; and 4)
For snubbers specifIcally required not to displace under continuous load, the ability of the snubber to witLstand load without displacement.
LIMERICK - UNIT 1 3/4 T-14 Araendment No. 54 g
PLANI 5 0lLMS SURVEILLANCE REQUIREMENTS (Continued)
Testing methods may be used to measure parameters indirectly or parameters other than those specified if those results can be correlated to the specified paramel rs thruugh estf.elished methods.
g.
Funct1onal Test failure Analysis An engineering evaluation shall be made of each failure to meet the functional test acceptance criteria to determine the cause of the failure.
The results of this evaluation shall be used, if applicable, in I
selecting snubbers to be tested in an effort to determine the OPERABILITY of other snubbers irrespective of type which may be subject to the same failure mode.
For the snubbers found inoperable, an engineering evaluation shall be o~ formed on the components to which the inoperable snubbers are attached.
The purpose of this engineering evaluation shall be to determine if the comnonents to which the ir. operable snubbers are attached were adversely affectt:d by the inoperability of the snubbers in order to ensure that the component remains capable of meeting the designed service.
h.
Functional Testing of Repaired and Replaced Snubbers Snubbers which fail the visual inspection or the functional test acceptance criteria shall be repaired or replaced.
Replacement snubbers and snubbers which have repairs which might affect the functional test result shall be tested to meet the functional test criteria before installation in the unit. Mechanical snubbers shall have met the acceptance criteria subsequent to their most recent service, and the freedom-of-motion-test must have been performed within 12 months before being installed in 'he unit.
i.
Snubber Service Life Replacement Program.-
(
The service life of all snubbers shall be monitored to ensure that the service life is not exceeded between surveillance inspections.
The maximum expected service life for various seals, springs, and other critical parts shall be extended or shortened based on monitored test n
):
results and failure history. Critical parts shall be replaced so that the maximum service life will not be exceeded during a period when the snubber is required to be OPERABLE. The parts replacements shall be documented and the documentat'on shall be retained in accordance with Specification 6.10.3.
LIMERICK - UNIT 1 3/4 7-15 Amendment No. 54 l
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10 9
8 7
6 C
5 l
4 CONTINUE -
TESTING p
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2 ACCEPT 1
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10 20 30 40 50 60 70 80 90 100 N
1 Figure 4.7.4-1 SAMPLE PLAN 2) FOR SHUBBER FUNCTIONAL TEST IEs Se LIHERICK - UNIT 1 3/4 7-16 Amendment No. 54 l
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l SHOBBERS (Continued)
To provide assurance of snuober functional reliability one of two functional testing methods is us?d with the stated acceptance criteria:
I 1.
Functionally test 10% sample of a type of snubber with an additional 1/2 sample tested for each functional testing f ailure,. or 2.
Functionally test 37 snubbers and determine sample acceptance using Figure 4.1.4-1.
Functional Testing sample plans are based on ASME/ ANSI OMc-1990 Addenda to ASME/ ANSI OH-1987, Part 4.
1
?igure 4.7.4-1 was developed using "Wald's Sequent M Probability Ratio Plan" as described in " Quality Control and Industrial S'M 3sv U" by Acheson J. Duncan.
Permanent c' other exemptions from the surveillant.e program for individual snubbers may bc granted by the Ccmmission if a justifiable basis for exemption is presented and, if applicable, snubber life destructive testing was performed to qualify the snubbers for the applicable design conditions at either the completion of thei-fabrication or at a subsequent date.
Snubbers so exempted shall be listed in the list of individual snubbers indicating the extent of the exemptions.
The service life of a snubber is evaluated via stanufacturer input and in?ormation through consideration of the snubber service conditions and associated installation and maintenance records (i.e., newly installed snubber, seal replaced, spring replaced, in high radiation area, in high temperature area, etc.).
The requirement to monitor the snubber service life is included to ensure that the snubbers periodically undergo a performance evaluation in view of their age and operating conditions. These records will provide rJatistical base-for future consideration of snubber service life.
3/4.7.5. $EAL.ED SOURCE CONTAMINATION
.The limitations on removable contamination for sources requiring leak testing, inciuding alpha emitters, is based on 10 CFR 70.39(c) limits for plutonium.
This limitation will ensure that leakage from byproduct, source, and 5Hcial nuclear material sourrJI will not exceed allowable intake values.
Sealed sources are classified into three groups according to their use, with surveillance requirements convnensurate with the probabiitty of damage to a source in that group.
Those sourcet which are frequently handled are required to be tested more often than those which are not.
Sealed sources which are continuously enclostd within a shielded mechanism, i.e., sealed sources within radiation monitoring devices, are Considered to be stored and need not be tested unless they are removed from the shielded mechanism.
LlHERIU - UNIT 1 B 3/4 7-3 Amendment No. 54
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1 PLANT SYSTEMS
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BASES 3/4 7.6 FIRE SUPPRE5310N SYSTEMS The OPERABILITY of the fire suppressior, systerrs ensures that adequate fire suppression capability is availaole to confine and extinguish fires occurring in any portion of the fJcility where safety-related (qui.pment is located.
The fire suppre;sion system consists of the water s,ystem, spray and/or sprinkler systems, C0g systems, Halon systems, and fire hose stations.
The collective capability of the fire suppression systems is adequate to minimite potential damage to safety-related equipment and is a major element in the facility fire protection program.
In the event that portions of the fire soppression systems are inoperable, alternate backup fire fighting equipment is required to be made available in the affected areas until the inoperable equipmer<c is restored to service.
When the in-operable fire fighting equipment is intendeJ for use as a backup means of fire supp-ression, a longer period of time is alloweq to provide an alternate means of fire fighting than if the inopersble equipment is the p-imarj means of fire suppression.
The surveillanc( requirements prove assurances that the minimum OPERABILITY requirements of tne fire suppression systems are met.
An allowance is made for ensuring a sufficient volume of Halon in the Halon storage tanks by verifying the weight and cressure of the tanks.
The source of water for the fir; protection system is two cooling tower basins that have a capacity of 7.2%,000 gallons each, for a total coacity of 14,400,000 gallons.
For a system, umping capacity of 5000 gpm, this allows continuous operation of both fire pumps for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
If-one cooling tower basin or. supply line is not available,.the remaining A3ter source provides both fire pumps with a 24-hour supply of water.
Water for the fire pumps is taken from either Uait 1 or Unit 2 cooling tower water basins through connections to the circulating water lines.
One cooling tower will be out*of service for up to 30 days each refueling outage on each unit, to remove the accumulated mud deposits.
k The minimum contained volurse of 311,000 gallons is based on the CHEB BTP 9.5-1 requirement of 500 gpm for manual hose streams plu: the largest design demand of any sprinkler or deluge system for a period af 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.
The largest plant sprinkler system flow is 2090 gpm for the turbine condenser compartment.
The mininium fuel supply of 330 gallors for the diesel driven fire pump is based an providing fuel for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of fall load. operation.
In'the event the. fire suppression water system becomes inoperable, immediate corrective raeasures ruust he taken since this system Drovides the major fire suppression capability of the plant.
314.7.7 FIRE RATED A55fMBLIES The OPERA 31LITY o' the fire barriers and barrier penetrations ensure that
' fire damage will ta if nited, these design features minimize the possibility L
of a single fire involving more than one five area prior to detection and I
extinguishment.
The fire barriers, fire barrier penetrations for conduits, j,
. cable trays and piping, fire windows, fire campers, and fire doors are periodic-ally inspected to verify their Of'ERABILITY, LLIMERICK - UNIT.1 3 2/4 7-4
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'o, UNITED STATES
-8 NUCLEAR REGULATORY COMMISSION r,
R WASHINGTON, o, C. 20$$$
h,..... f' EtiLMQLL?HIA ELECTRIC COMPA_R1 DECXLT No 50-353 LlHERICK GENERATJMjilA110N. UH1T 2 6tif@difiT TO FACILITY QEfE11NG LICENSI i
Amendtent No. 19 License No. NPF-85 1.
The Nuclear Regulatory Commission (the Comm12sion) has found that:
A.
The application for amendment by Philade'phia Electric Company (the licensee) dated March 3, 1992, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act),
and the Commission't rules and regulations set forth in 10 CFR Chapter '.;
B.
The facility will operate in conformity with the application, the previsions of the Act, and the rules and regulations of the Commission:
C.
There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.
The issuance of this amendment will not be inimical to the common defense ar.d security or to the health and safety of the public; and
.E.
The issuance of this amendrtent is in accordance with 10 CFR Part 51 of V
the Commission's regulations and all applicable requirements have been satisfied.
2.
Accordingly, the. license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment, and paragraph 2.C.(2) of.Facilfty Operating License No. NPF-85 is hereby amended to cead as follows:
n
4 2-Ig.chnic.41 Seeeificatieqi The Technica1' Specifications contained in Appendix A and the Envirsnmental 3
Protection Plan contained in Appendix B, as revised through Amendment
-No.
19
, are hereby incorporated into this license.
Philadelphia Electric Company shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.
3.
This license amendment is effective as of its date of issuance.
FOR THE NUCLEAR RECULAT097 COMMISS10tl n b IWA.)
Charles L. Miller, Director Project Directorate 1-2 Division of Reactor Projects - 1/II Office of Nuclear Reactor Regulation
Attachment:
Changes _to the Technical Specifications
- Date of issuance:
May 11, 1992 S
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1 ATTACHMENT TO llCENSE AMENDMENT 110.19 BCMY OPERATING LICENSLjp. NPF-85 09.CKCLE 50:.111 Replace the following pages of the tppendix A Technical Specifications with the attached pages. The revised pages are identified by Amendment number and contain vertical lines indicating the area of change, t
.Y.S bb 3/4 7-13 3/4 7-13 3/4 7-14 3/4 7-14 3/4 7-15 3/4 7-15 3/4 7-16 3/4 7-16 B 3/4 7-3 B 3/4 7-3 8
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- PLANTSYS_TEh5 SURVEILLANCE REQUIREMENT $ (Continued) l e.
Functional Tests t
At least unce-per 18 months a representative sample of each type of j
snubber sna11 be tested using the following s mple plans.
The sample plan (s) shall be selected for each type priur to the test period and cannot be changed during the test period.
The NnC Regional Adminissrator shall be notified in writing of the sample plan s prior to the test period or the sample plan (s) u(se)d in the prior testselected i
period snell be implemented:
1)
At least 10% of the total population of a snubber type shall be functionally tested.
For each snubber of_that type that does not meet the functional test acceptance criteria of Specification 4.7.4f., an additional semple of at least 1/2 the size of the initial sar,ple shall be tested until the total number tested is equal to the initial sanple multiplied by the factor, 1+C/2, where C is the total number of unacceptable snubbers ci until all the snubbers of that type have been tested; or l
s 2)
A representative sample of 37 snubbers of a snubber type shall be functionally tested in accordance witn figure 4.7.4-1.
"C" is the total number of snubbers nf that type found not meeting the acceptance requirements of Specification 4.7.4f.
The cumulative
-number of snubbers of the type tested is denoted by "h".
If at an) time the point plotted falls in the " Accept" region, testing of snubbers of that type may be terminated. When the point plotted lies in the " Continue Testing" region, additional snubbers of that type shall be tested until the point falls in the " Accept" region, or all the snubbers of that type have been tested.
I L
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L LIMERICK - UNIT 2 3/4 7-13 Amendment No.19 l,
PLANT SYSTEMS I
SURVEILLANCEREQUIREMENTS(Continued)
The representative sample helected for the function test sample plans shall be randomly selected from the snubbers cf each type and rt. viewed before beginning the testing.
The review shall ensure as far as practical that they are representative r' the various con #1gurations, operating environments, range of size, und capacity of snubu rs of that type.
Srubbers placed in the same locations as sN bbers whict failed in the previous functional te;it period shall be retested at the time of the next functional test period but shall not be included in the sample plan, and failure of this functional test shall not be the sole cause for incteasing the sample size under the sample plan.
Testing equipment failure durirg functional testing may invalidate the day's testing and i
allow that day's testing to resume anew at a later time provided all i
snubbers tested with the failed equipment during the day of equipment failure are retested.
If during the functional testing, additional testing is required due to failure of snubbers, the unacceptable snubbers may be catergorized into failure ".ade group (s). A failure mode group shall include all unacceptable snubbers that have a given failure mode and all other snubbers subject to the same failure mode.
Once a failure mode group has been established, it can be separated for continued testing apart from the general r>opulation of snubbers. However, all unacceptable snubbers in the failure. mode group shall be counted as one unacceptable snubber for additional testing in the general population.
Testir; in the failure mode group shall be based un the number of unacceptable srubbers and shall continue in accordance with the sample plan selected for the type i
or until ali snubbers in the failure mode group have been tested. Any-additional unacceptable snubbers found in Ghe failure mode group shall be counted for continue testing only for that test failure mode group.
In the event that c snubber (s) becomes included in more than one test failurt mode group, it shall be counted in each failure mode group and shall be subject to the corrective actiort of each test failure mode e
group.
f.
FunctionQlestAcceptanceCriteria i
The snubber functional test shall verify that:
I 1)
Activation (restraining action) is achieved within the specified j
range in'both tensim and compression; l
2)
Snubber bleed, or release rate where required, it, present in both tension and compression, within the specified range (hydraulic snubbersonly);
i 3) for mechanical snubbers, the force requirer' *o initiate or maintain motion of the snubber is within the specifieJ range in both directions of travel; and 4)
For saubbers spicifically reg red not to displace under continuous load, the abilltj of the snubber to withstand load without displacement.
L MERICK - UNIT 2,
3/4 7-14 Amendment No.19 l
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P_LANT SYSTEMS j
l SURVEILLANCEREQUIREMENTS(Continued) i i
Testing methods may be used to measure parameters indirectly or parameters other than those specified if those results Caa be torrelated to the specified parameters through established methods.
g.
Functional Test Failure Analysis An engineering evaluation shall be made o' each fai?ure to meet the functional test acceptance criteria to determine the cause of the failure.
The results of tnis evaluation shall be used, if applicable, in selecting snubber:. to be tested in an effort to determine the OPERABILITY of.other snubbers irrespective of type which may be subaect to the same failure moce.
For the snubbers found inoperable, an engineering evaluation shall be performed on the components to which the inoperable snubt.ers cra attached.
The purpose of this engineering evaluation shall be to determine if the components to which the inoperable snubbers are attached were adversely affected by the inope ability of the snubbers in order to ensure that the component remains capable of meeting the designed service.
h.
Functional Testino_of Repaired and Replaced Snubbers Snubbers which fail the visual inspection or the functional test acceptance criterie. shall be repaired or replaced.
Repivement snubbers and snubbers which have repairs which might affect the functional test result shall be tested to meet the functional test criteria before installation in the unit. Mechanical snubbers shall have met the acceptance criterin subsequent to their most recent service, and the freedom.of-motion test must have been performed within 12 months before being instcIled in the unit.
1.
Snubber Service Life Replacement 'rogram -
The service life of all snubbers shall be monitored to ensure that the service life is not exceeded between surveillance inspections.
The maximum expected service life for variou; seuls, springs,_and other critical parts shall be extended or shortened based on monitored test results and failure history.
Critical parts shall be replaced so that the maxi.num service life will not be exceeded during a period when the snu %er is required to be OPERABLE.
The parts replacements shall be documented and the documentation shall be retained in accordance with Specificat. ion 6.10.3.
LIMERICK - UNIT 2 3/4 7-15 Amendment No.19
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8 i
7 6
C 5
4 1-CONTINUE TESTING
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ACCEPT
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10 20 30 40 50 60 70 80 90 100 N
Figure 4.7.4-1 SAMPl.E PLAA 2) FOR SNUBBER FUNCTIONAL TEST
. LIMERICK - UNIT 2
~
3/4 7-16 Amendment No.19 l
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PLANT $YSTE15 BASES
'~~
INUBBERS (Continued)
To provide assurance of snubber functional reliability one of two functional testing methods is used with the stated acceptance criteria:
1 1.
Functionally 'est 10% sample of a type of snubber with an additional 1/2 sample tested for each functional testing failure, or 2.
Functionally test 37 snubbers and determine sample acceptance using 1
Figure 4.7.4-1.
functional Testing sample plans are based on ASME/ ANSI OMc-1990 Addenda to ASME/ ANSI OM-1987, Part 4.
Figure 4.7.4-1 was developed using "Wald's Sequential Probability Ratio Plan" as described in " Quality Control and Industrial Statistics" by Acheson J. Duncan.
Permanent q* other exemptions from the surveillance program for individual snubbers may be granted by the Commission if a justifiable basis for exemption is presented and, if applicable, snubber life destructive testing was performed to qualify the snubbers for the applicable design conditions at either the completion of their fab-ication or at a subsequent date. Snubbers so exempted shall be listed in the list of individual snubbers indicating the extent of the exemptions.
The service life of a snubber is evaluated via manufacturer input and Information through consideration of the snubber service conditions and associated installation and maintenance records (i.e., newly installed snubber, seal replaced, spring replaced, in high radiation area, in high temperature area, i
etc.).
The requirement to nonitnr the snubber service life is included to ensure that the_ snubbers periodically andergo a performance evaluation'in view of their age and operating conditions.
These records will provide statistical bases for future cofesideration of snubber service life.
3/4.7.5 SEALED SOUPCE CONTAMINATION The limitations on removable contamination for sources requiring i?.k testino, inclnding alpha emitters, is based on 10 CFR 70.39(c) limits for plutonium.
This limitation will ensure that leakage from byproduct, source, and special nt(' ear material sources will not exceed allowable intoke values. Sealed sources are classified into tnree groups according to their u;e. with surveillance requirements commensurate with-the_pecbability.of-damage to a source in that group. Those sources which are frequently handled are required to be tested more often than-those which are not. Sealed sources which are centinuously erciosed within a shielded mechanism, i.e., sealed sources within radiation monitoring devices, are considered to be stored and need not be tested unless they are
. removed from the shielded mechanism.
L1HEPICV - UNIT 2 0 3/4 7-3 hunkbent No.19 l
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