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ME TROPOLITAN EDISON COMPhNY svepmanv or cr.wnsi weuc ununts cov==Ana.v
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! ar Sir:
L o ci e t No. 50-289 Ope rati n; i.i c -nse :;o. DPR-50
~ n..nical S;mcification Ch r;e Ea,ast ':o.
7, 1-m ' e a t ';o. 1 Enclosed are three signed originals and thi rty-seven confot ed copies of Technical Specification Change Request No. 7, Amends-nt 1, requesting fppendix A of Operating License No. DPR-50.
As a part of emndnent to s
t;is request, proposed replacc1 cat pager for Appendix A are enclosed.
Also enclosed is one signed copy of Certificate of Service for preposed Technical Specification Change Request No.
7, Amendaent 1, to the chief executives of the township and county in which the f acility is located.
Please note that this atendment supersedes our precious Change Request g
No. 7.
I Sincerely,
/s/ R.
C. Arnold R. C. Arnold Vice Pre sident RCA:CWS:pa File /./.4.3.6.1/20.1.1 f
Enclosures:
1.
Technical Spec ^ification Change Request No. 7, Acendment 1 l
(Tn re e (3) Originals / 37 Copies) 3 11.
Certificate of Service for Proposed Technical Specification Change Request No. 7, Anendment 1 l
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.a Opsrating License No. 6PR-50 Docket No. 50-289
^ ch -ic,1 S ecification Chan ce Eecu-st No. 7.'c.en dment No. 1
.:s..ci..1 cal % rification Chrng: Eeq est ir sub:cittec in support of Licesce's request to change
'.7 3ndix A to C7 2: at in;; Lic ens a No. DPR-50 fcr Three Mile Island Nuclear Station Unit 1.
5:T RO POL ITA's EDISON CO:'?Ala' By /s/ R. C. Arnold Vice President-Generation Sworn and subscribed to me this 28th day' of October 1975
/s/ Richard I. Ruth Notary Public I
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a copy of Technical Specificaticn Change Esquest Tnis is to certifv t.n a t idix A of the C,,erating License tor 2nree
': a. 7 nt '; o, 1 to
' 12 I s ::,3 ',ucl.. r S :c tion Uni t 1, cated Oc:cber 25, 1975,
.c filed with _.: U.
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~._.-'stor,, Cn~~ c c ce on O c; c'. e r 2 5, 19 7f, h as th is 15 th iay of Oc:o're-
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c?. 2 e : u ccu<1.ec of Londonlerry Tcwns',ip, Lauphin County, i c~.sylvania r ad Dauphin Ca caty, Pennsylvania by deposit in the United S tates nai', acidressed as follews:
M r. Welu on 3. Are'n a rt, Ch aircan Mr. Charles P. ' icy, Chai rcan Board of Supervisors of Eoard of County Cc. nirsioners Londonderry Township of Dauphin County R. D. #1, Geyers Church Road Dauphin County Court Houce Middletown, Pennsylvania 17057 Harrisburg, Pennsylvania 17120 METROPOLITAN EDISON COMPAhT By /s/ R. C. Arnold Vice President-Generation 1
I
Three Mile Island suelear Station l' nit 1 Operating License No. DPR-50 Docket No. 50-2S9
' r ua s t '!c. 7 A 2rdment No. 1 T2 c'. nic al.cmerification Chance L'censee r3,nats th n th e fo11cwing ch,nges be made to sppendix A of the 13 1 :c. c m e c..y.ae 3 ::aci. -d mr.,ngec r eges.
2nis T.- c'.m i c a l ( c i fi c a t i r s,
Chnge Rcq.2st super!.edes cur pre.icus Ch uge E. w st No. 7.
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Page iii.
I' 31s te "4.12 CONTROL ROOM FILT E?.ING SYS TI."", "4.12.1 OPEr.ATISG TE S TS ", "4.12.2 FILTER TESTS" and "4.14 r3ACTOP BUILDISG FURCE EX-
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.i Page 3-61 through 3-66.
'.dd new Specification Section 3.15.
Fase 4-55.
m let-W sting specification 4.12 and 23d revia-d Specification Section 4.12 (pages 4-55 through 4-55e).
Page 4-8 Change No. 8 on Table 4.1-2 as indicated on attached changed page.
Note that No, 11 of Table 4.1-?. has been requested to be deleted by our Change Request No. 19 (August 23, 1975).
Reasons for Proposed Change'
{
The change is proposed to provide additional specifications to ensure high confidence that these systems will function reliably, when needed, at a high degre e of eff iciency.
It should oe noted that this proposed change was requested by the Cor iissions',
Mr. George Lear, in his letter to the licensee dated Decenber 6,1974.
This Ace.n<' cent ircorporateSthe changes agreed upon at the July 28, 1975, meeting between the NRC and Met-Ed representatives.
te=peratures for the Control Room and Auxiliary and Fuel Handling Duilding Tent g
air treatment systees have been designated to be 125 F in that i
e
a) testing at 130 C could result.in teeting the laboratory decontamina-tion efficiency by removal of contaminants volatile at this high terperature thus providing an unrealistic carbon ef f'.ciency b) testing at 125 F provides for testing at a terperat2re which is realistic nder accident conditions fer Chese air treateent systers tnd therefore constitutes a worst case efficiency.
- st :2 --^ rature of 250 F for the Eeactor Building Purge Air Treattent E)<te:.cs '.2en ces.Lmated to provide a test t e r,n e r a t u re in d 23 rees Fah re nh eit.
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.ir d "j C - i! hazarCs monsideration nor an urz reviewed safety question and will not cause undue risk tc the health End safety of tc public.
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3.15 AIR TREATMENT SYSTEMS
. 3.15.1 EMERGENCY CONTROL ROOM AIR TREATMENT SYSTEM Appli c ab ility Applies to the energency control room air treattent syste= and its associated
filters.
C: { e c t._i c e-To s: -cify
.inir a a cailability and ef ficiency for the crergency control re : cir tr_ac.; synte cn: its.ssocir_ted filters.
Faaci'ication
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-,d c: a r _ ; a: m f il;e r.?m.-i35 shall b e operable at all tires, per the r3cuir ments of Specification 3.15.1.2 celew, when contain:ent integrity is required.
2.15.1.2
- a. The r-tults of the in-place LOF and h alegenated h>3rocarbcn testa at Ce. sign flews on.: EPA filters and cPa rccal 4 :-orier '. d.o n n11 s.u <1; K: y;retratien and <1: al:t nsted
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, except that the DOP test will be cer. ducted with pre-filters installed.
b. Th e results of laboratory carbon sc=ple analyses shall show
>90% radio:ctive c. ethyl iodide decontsmination efficiency o
when teated (125 F, 95% R.H.).
- c. The f ans AH-18A and ISB shall each be shown to operate within
+ 4000_CFM of design flow (40,000 CFM) j 3.15.1.3
- a. From and af ter the date that one control room air treattent system is made or found to be inoperable for any reason,'
l
_ reactor" operation'is' permissible only' during' the succeeding
.El.g3 7 '
seved days unless both circuits are sooner made operable.
3.15.1.4 If these conditions cannot be cet, reactor shutdown shall be initiated and the reactor shall be in cold shutdown within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
h Bases i
The emergency control room air treatment systems AH-E18A and 183 and their associated filters are two independent systecs designed to filter th e control room ateosphere for intake air and/or for recirculation during control room isolation conditions. The control building is designed to be automatically placed in the recirculation node upon an RM-Al high radiation alarm, air tunnel device actuation, ESAS actuation l
or station blackout condition.
The energency control reem air treattent fan and filter AH-E18A or B and AH-E3A or B is designed to be manually started by the operator if a high radiation alarm f rom RM-Al is indicated.
I T-61
Prefilters and high ef ficiency particulate absolute (HEPA) filters are installed
~ before the charcoal absorbers to prevent clegging of dhe iodine absorbers and remove particulate activity.
The charcoal absorbers are installed to reduce the potential intake of radiciodine to the control room. If the efficiencies of the HE?A filters and charcoal absorbers are as specified, the resulting deses will be less dhan the allowable levels stated in Criterion 19 of the General Design Criteria for Nuclear Power Plants, Appendix A to 10 CFR Part 50.
Operation of the fans significantly cif f er:nt f ree the design flew vill cF nge t'.e renoval ef ficiency of the IP A filt e rs and ch arcc =.1 abserb ers.
If cne sjster is f ound to be ira perable, tnere is no 1:: diate threat to the control roo: and reactor eperation may continue for a d
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3.15.2 REACTOR BUILDING PURGE AIR TREATMF_NT SYSTEM
- Applicability
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Applies to the reactor building purge air treattent syste and its associated
- filters, i
Objective
~o <::cify rininu: availability and efficiency for the reactor building purge sir t::atnant syster and its cssociated filters.
51 2 IElei2n the Eeactor 3.15.2.1 E a a, as rperf fiad in F eci ficat ion 3.15.2.3 below, -
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3.15.2.2
- a. The re sult s of tn e in-place DOP and halegenated hydrocarbon tests at design f1cus on HEPA filters and charcoal absarber banks for AH-F1 shall show <1% DOP p --tratic-nd <1L' hal og enat e d hydroca rb cr pen-tra tion except that th: ::? tas: will be ccndacted with pre-filters installed.
- b. The results of laboratory carbon sanple analys is f rom the reactor building purge syste= filter carbon shall shcw >9,0*
radioactive cethyl iodide decontamination efficiency (250 F, 95* R.H.).
- c. Fans AH-E 7A an-3 shall each be shown to operate within i 2,500 CFM of design flow (25,000 CFM) 3.15.2.3
- a. From and af ter the date that the filter AH-F1 in the reactor building purge system is made or found to be inoperable as defined by' SpecificafioE 3.15.2.'2[' abo've, or both f ans AH-E7A -
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and B are found to be inoperable, re tor operation is permissible only during the succeeding thirty days, unless such filter and at least one fan is sooner cade operable.
- b. If the required conditicas for the reactor building purge filter and f an cannot be cet af ter 30 days, operations shall be terminate <. innediately and the reactor placed in cold shutdown w:. thin 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
Bases The Reactor Building Purge Exhaust system filter AH-F1 while normally used to filter.all reacto-building exhaust air, serves also as the post accident purge filter when osed in conjunction with the Hydrogen Purge System to reduce hydrogen gas concentrations in the reactor building following a LOCA.
It is necessary to demonstrate operability of these filters to cssure readiness for service if recyired, approxicately thirty (30) days following a hypothetical LOCA.
3-63
High e f f iciency pa rticulate ab solute (HEPA) filte rs are ins talled before th e charccal absorbers to prevent clogging of the iodine cb sorb ers for all energency air treatment systens.
The charccal absorbers are installed to reduce the potential release of radiciodine to the envirennant.
If the ef ficiencies of the HEPA filters,and charcoal absorbers are as specified, the resulting doses will be less Chan dhe 10 CFR 100 guideliner for the accident analyzed in FSAR Supplement 1 Part III, which asst 2.es 90' e f ficiency.
1 The flew through AH-F1 by design can vary f rom O CFM to 50,000 CEK, the 22 x i -,:2 purge flow rate, with crke-up air being provided be twcan the filter AE-F1 and the f ans A'i-E 7A and E to naintain a constant reactor buildin; purge e:._.aust stack flew rate of 50,000 CDf regardless of the octual purge ficw.
>ferences
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3.15.3 AD:ILIARY M;D FUEL FJ2?DLING D3AUST AIR TREAT".ENT SYSTEM Applic ab ility
. Applies to the auxiliary and fuel handling exhaust air treatcent system.
Objective To specify the tinicus avm.1 ability and efficiency for the auxiliary M"hj and f uel handling exhaust air treatcent system.
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all tires when fuel handling c,:eraticas syster shall be operable at are in progress in the Fuel Handling building.P This applies
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.e f al 'andlir:s air t r : s t:.a nt systec is cade or found to be inrperable, that is the filters Ah-F 1A, B,C, and D and/or both sets of fans AL-E l'A and C an d AE-E 14 3 an d D, are inoperable, fuel h=ndling operations shall ne te rrina ted a ediat el:. until the ccupcnents are retu=2d to sercice.
3.15.3.2
- a..ae ru v.1:s of th e in-piece DOF and halogerat ed hydrocarben tests at design flows on HEpA filters and charcoal absorber banks shall show <1% DOP penetration and <1% halogenated hydrocarbon penetration
', except that the DOP test will be conducted with prefilters installed.
- b. The results of laboratory carbon sample analysis shall show
>90% radioactive methyl icdide decontamination efficiency
~
(125 F, 95% R.H.).
- c. Each set of f ans AH-E14 A & C and AH-E14 B & D shall each be
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' A " shown' to haveTthe cariaciti of"op'erating Yithin + 11,881 CFM 3, _r,fY.
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of design _ flow (118,810 CFM) _
Bases The Auxiliary and Fuel Handling Building Exhaust System consists prir:arily of the erhaust filte:s AH-F2A, B, C, and D and two sats of redundant exhaca t f ans AH-E14A and C or AH-E14B and D which take the exhaust air f rom both the Auxiliary Building and the Fuel Handling Building and discharge it to the Auxiliary and Fuel Handling building exhaust stack. All the air passes through the exhaust filters AH-F2A, B, C, and D 100% of the time prior to being discharged to the stack.
High efficiency particulate absolute (HEPA) filt'ers are installed before the charcoal absorbers to prevent clogging of the iodine absorbers for all emergency air treatment systems.
The charcoal absorbers are installed to reduce the potential relense of radiciodine to the environment.
3-65
If the ef ficiencies of the HFJA fi'.ters and charcoal absc b ers are as specified, the resulting doses will be less than the 10 C.;7.100 guidelines for the accidents analy.ed in Chap er 14 of the I'SAR, which assures 90 efficiency.
~
If the auxiliary and fuel handling-exhaust air systen is found to be inoperable, all fuel handling and fuel reve ent operations vi.ll be terninated tatil the system is cade operable.
IeferenceS (1)
FSAR Section 9.8 C) iS'3. Tizure 9-20 e4 es O
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3-66
TABLE 4.1-2 MINIMUM EQUlFMENT TEST FREQUENCY
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C' trol eds Eod crc; tinc of mil Each refueling chutdcun full le:.gth rods od Eve re te ce ns, d en reactor c
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7, 3.
7: s t arine r Safety Set;cint
? :1 2 :t :=fcalin; pcriad Valves 4.
Main Stca: Safety Setpoint 23:: each refueling period valves 5.
"2 'aling Fvs t a:
Functional 9 tart of rach refueling period I,t c r i o :~..s 6.
Main S team (See Section 4.8) 47 Isola tion Valves 7.
Tar.ctor Coolcnt Eval uat e hily, -hen reactor coolant System Leakage systen tegcrature is greater than 525 F 8.
Air Trcatment See Section 3.15 See Section 4.12 Systems
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...Each. refueling period pr.ior... t.o.P:
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fuel handling System 10.
Intake Pu=p House (a) Silt Accumulativu-Each refueling period Floo r Visual inspection of Intake (Elevation 262 Ft Pt=p House Floor 6 in.)
(b) Silt Accumulation Qunrterly Measurement of Ptcp House Flow I
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1 4-8 i
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4.12 AIR TFIATPINT SYSTEMS 4.12.1 EVERGENCY CONTROL ROOM AIR TREAFINT SYSTEM
' Applicability Applies to the energency control room air treat:ent system and associated ccrpor.2nts.
Obj~ctive, To. e ri fy th a t this syste: rnd assccf ated cenpor. ants will be able to perfo :
its 2:37 fc :.icns.
Spac!fication
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4.12.1.2
- a. The tests and sa ple analysis recuired by Specification 3.15.1.2 shall be ; rfor :d initially and at least once for s ta,dby service or af ter eury 720 houra of
- . e r. e n oper-Itica nd foll
- ing cipificcat painting, fire or c!.-Ieri rel_::e in any ntilatic a
- nc. cac ;nicating with the syc t2=.
- b. DCP testing shall be perfor 2d on the affected portions of the filter af ter cach cenplete or partial replacar2nt of the EEPA filter bin. or af ter any structural cinte rnce en the system housing.
- c. Halogenated hydrocarbon testing shall be performed on the affected portion of the filter after each complete or partial r placement of the charcoal absorber bank or after the system housing..
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- d. Each AH-E18A and B (AH-F3A and B) f an/ filter circuit shall -
be operated at least 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> every month.
4.12.1.
At lenst once per refueling interval, autor,atic initiation of the Control Building icclatica and recirculatica D:tpera AH-D28, 37, 39, and 36 shall be de:costrated as operable.
Eas es_
Pressure drop across the combined HEPA filters and charcoal absorbers of lecs then 6 inches of water at the system design flow rate vill indiente that the filters and absorbers are not clogged by excessive amounto of foreign matter. Pressure drop should be determined at least once per refueling ' cycle to chcv system perforcance ccpability.
4-55
"he f requency of tests and sa ple analy sis are necessa ry to shcw that th e EEPA filters and charcoal absorbers can perfcr as evaluated.
Tests of the charcoal absorbers with halogenated hydrocarbon shall be perforced in accordance with approved test procedures. Replacerent absorbent should be qualified according to Regulatory Guide 1.52 Ah% f t7y.
The charcoal absorber ef ficiency test procedures should allow for the removal of one absorber tray, ecptying of one bed from the tray, mixing the tb so rb ent thoroughly and obtaining at least two sacples.
Each sarple should be at least two inches in diameter and a length equal to the thickness of the bed.
If test results are unacceptable all absorbent in the systen shall be replaced.
Tests of the HEPA filters with DJF aerosol shall also be perfor ?d in accordance with appre.ed test pra:edures. Any HE?A filters f o.nd C2 fective should be replaced with ffiters qualified according to gul: tory Guide 1.52 /b4 iW Cperation of the systc; f or 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> every ranth will derenstrate
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. - :c r If significant painting, fire or cie-ical r21ecsc occurs duch that the HT_PA filter or charcoal absorber could become cont w.inated f rom the fuses, chemicals or foreign caterials, th e s cse tests cad sa ple analysis shall be perforced as required for operational use.
Tae d ater.ination of significance shall be nade by the I.* nit Superintendent, r=r-onstration of the nutcratic initiatica of the recir:ci stion ade of cp ? ration is nec essary to cs sure cys te= perfornac 2 cc,,1b ili ty.
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4.12.2 REAt'iOP. SUILDING PURGE AIR TFIATPWT SYSTEM Appl ic ab il l_t.v Applies to th e re actor building pur,ge air treattent syste= and cssociated corponents.
Ehje_ctive To verify that this syste= and associated conponents will be able to perform its desiga functicas.
S cificatfon 4.12.2.1 At Icast once per refueling int;;eal, it shall be deranstrated
' hat the,ressure drop acrcss the cerbined HEPA filters and
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- a. The tes ts cnd sample analysis required by Specification 3.15.2.2, shall be perforned initially and each 18 uonths or after each 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of operatien and following significant painting, fire, or chenical rsicase in say entil:tien ;rne cer:~nicating with the syrt t.
- b. LDP tec ting f-'11 b e p e r ic d
c, the cffected partion of the filt a r i. ; 2 r ec: h c _ :p' t2 or ; rcial r2plac; :nt of a HEPA filter bank or af ter any structurcl raintcrance on the system housing.
- c. Halcgenated hydrocarbcn testing sh911 be perfore-d on the affected portions of the filter af ter c ch c; glete or partial replace ent of a charcoal absorber bcnk or af ter any structural maintenance on the system housing.
- d. The Reactor Building purge exhaust fans AH-E7A and B shall be operated at least 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> every month, either during
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Eases Pressure drop across the combined HEPA filters and charcoal cbsorbers of less Chan 6 inches of water at the system design flow rate vill indicate diat the filters and absorbers are not cicgged by excessive acaents of foreign natter. Pressure drop should be determined at least once every refueling interval to shca system perfortcnce capability.
The frequency of tests and sample analysis are necessary to show that the HEPA filters and charcoal absorbers can perform as evaluated. Tests of the charcoal absorbers with halogenated hydrocarbon refrigercnt shall be performed in accordance with approved test procedures. The charcoal absorber efficiency test procedures should allow for the removal of one absorber tray, emptying of one bed from the tray, mixing the cbeorbent thoroughly and obtaining at least two sa ples. Each sample chould be at 1 cast two inches in diameter and a length equal to the thickness of the bed.
If test results are unecceptchle, all tbcorbent in the 4-55b
system should be replaced with an absorbent qualified according to Pegulatory Guide 1.52 AL.4 Ung.
Tests of the HEPA filters with LOP aerosol shall also be perforned in accordance with approved test procedures. Any HEPA filters found defective should be replaced with filters qualified according to Regulatory Guide 1.52 && (g-n.
Operation of the coergency air treatment system each nanth for at least ten (10) hours will deconstrate operability of the fans and when operated in de purge made vill tend to cause the filter and absorber system to r.:.a v : excessive caisture built up en the absorber.
- nting, fire, or ch_2ical rel_7s2 occurs such that th e If i;;.i fi._c.
- - :
- iEF^ filt -r or cht rce21 absorber could become contaminated f rc th e f tr.a s,
c'..ricris or f r ip. ratorial, the sr_:e tests and szc ple analysis shall be
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AUXILI ARY A'O FEI., RODLISG D3AUST AIR T TATMGT SYSEM 4.12.3 pplicability to the atotiliary and fuel hzndling building exhaust air treettent
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Applies
, system and associated components..
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Objective To verify that this system and associated cc ponents will be able to perfern its design functions.
S:ccification 14.2.3.1 At M st cace p:: ::fteling interval, it 2S 11 La de.;nstrated th e cer',ined
.b sorber b =hs is
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- er 2t syst:: design ficw rate.
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. shall 0: ; rion 2d iritidly CC G L 3.15.5.2 15 conths or af ter each 'T20 hours of ep::: tica and felle -ing significant pairting, fire, or chtnical release in any cernunicating with the systc.
vertilatien ecne
- b. ::P t tin ; sh,11 ': e perfomd en the af fected -artices fil:er cf cr each cc _plete or partisl replace cat of t'n e of a :E?A filter b nk or : ter any ot ruc cal r =iatanance en th e sys t. : m.:s in g.
- c. Halog:nated hydrocarbon testing shall be perforned cn the affected porticas of t' e filter af ter each cenplete or pa rtial replacement of a charcoal absorber b:.nk or af ter any structural maintenance on the AH-F 2A, B, C, or D housing.
- d. The fan coubination AH-E 14A and C and AH-E 14F and D shall be operated at least 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> every month.
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., Pressure drop ~ across the combined EL'PA filters and charcoal absorbers of less than 6 inches of water at the system design flow rate will the filters and absorbers are not clogged by excessive indicate that Fressure drop should be determined at letst arounts of fereign matter.
onca every refueling interval to shcw system perfomcnce capability.
Tae frequency of x.ests and sm ple analysis are necessary to show that the HEPA filters and charcoal absorbers can perfom as evaluated.
Tests of the charcoal absorbers with halogenated hydrocarbon refrigercnt shall The charcoal be perforced in accordance with approved test procedures.
absorber efficiency test procedures should allow for the recoval of one
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absorber tray, emptying of one bed from the tray, mixing the absorbent thoroughly and obtaining at ieast two samples. Each sc=ple should be at least two inches in diameter and a Jength equal to th'e thickness of If test results are unacceptable, all absorbent in the systen the bed.
4-55d
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should be re;2 aced with an ab sorhent ;ualified according to r.e gul a t o ry Guide 1.52 &<h rME Tests of the HEPA filters with D0? aerosol
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shall be perf orced in accordance with a,> proved procedures. Any HEPA filt ers found defective should be replaced with filters qualified according to Regulator,f Guide 1.52 m-c A19%
Operation of the Auxiliary and Fuel Handling Building Exhaust Fans each conth for at least ten (10) hours will deconstrate operability of the f ans.
If significant painting, fire, or chemical release occurs such that the HFPA filter or charcoal Ost:ber could becc e contaminated from th e fr es, cl.e-icals or '. c=
- r ner'.al, the sc_1c tests and sc
- ple
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-12 sh211 be perfo med :=.<;uired far - ; ' r at icnsl us e.
The d-ter-ination of significant sh ell be r.2de by th e Unit Superintendent.
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