ML20136A803

Forwards Oversized Drawings of Corrected Feedwater Lines to Steam Generator,Including Results of Stress Analysis Tests & Details of Welding Processes Used in Making nozzle-to-pipe, pipe-to-sparger & Pipe Welds,In Response to 790525 Request

ML20136A803
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/18/1979
From:	Trimble D ARKANSAS POWER & LIGHT CO.
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
NUDOCS 7906200214
Download: ML20136A803 (19)

Text

d I ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 UTTLE ROCK. ARKANSAS 72203 (5011371-4000 June 18,1979 1-069-11 2-069-7 Director of Nuclear Reactor Regulation ATTN:

Mr. Darrel G. Eisenhut, Acting Director Division of Operating Reactors V. S. Nuclear Regulatory Commission Washington, D. C.

20555

Subject:

Arkansas Nuclear One - Units 1 & 2 Docket Nos. 50-313 & 50-368 License Nos. DPR-51 & NPF-6 PWR Feedwater Lines (File:

1510, 2-1510)

Gentlemen:

The following is provided in response to your letter of Pay 25, 1979 con-cerning PWR feedwater lines.

Item Provide as-built piping or isometric drawings of the feedwater line to steam generator sparger within containment.

Show details of the design such as dimensions, pipe schedule, support type and locations, pipe restraints, and valve (s).

Response - Unit 1 Attached is drawing EBB-1, Sheets 1 and 2.

These drawings show the design details requested in the above item, with the exception of the pipe size and schedule.

Response - Unit 2 Attached are drawings 2DBB-1-2 and 208B-2-2.

These drawings show all of design details requested with the exception of locations and type of pipe restraints and supports.

These are shown in the attached figures 2DBB-1 and 20BB-2, The attached Bechtel Calculations, Num-j bers 6600-2-1018 and 6600-2-1019 identify hangar types, pipe size, and schedule.

Item Provide the results of any stress or fatigue analyses which was perfonned for this system.

7 906200$h MEMBEA MtOOLE SOUTH UTiLmES GvGTEM

1-069-11 2-069-7 Mr. Darrel G. Eisenhut June 18, 1979 Response - Unit 1 Results of the stress analyses performed on the feedwater lines are attached.

The data points reference figure EBB-1, Sheets 1 and 2.

Also shown in these analyses are the pipe size and schedule.

Response - Unit 2 Results of the stress analyses performed on the feedwater lines are attached.

The data points reference the attached figures 2DBB-1 and 2DBB-2.

Item Supply a list of the materials for the steam generator sparger, steam generator feedwater nozzles and feedwater piping within containment.

Response - Unit 1 The steam generator sparger, nozzles and the feedwater piping within containment is carbon steel, SA-106-Grade B.

Response - Unit 2

{

Materials used in the feedwater system are as follows:

t Sparger SA-106-Grade B Nozzles SA-508-Class II Sa fe-End SA-508-Class I Piping SA-106-Grade C Item Provide the details of the welding process (es) used to make the nozzle-to-pipe, pipe to sparger and piping welds.

Include details of welding such as preheat, joint configuration (include with or without backing ring), and post weld treatment, if any.

Response - Unit 1 The sparger for the B&W steam generator is a ring header around the out-side of the generator.

The nozzles are flanged to the header.

The weld-ing procedure specification used to make piping, and piping to sparger welds is attached.

Details of welding such as pre-heat and joint con-figuration are included.

Backing rings were not used.

Post-weld heat treatment was required for all subject welds.

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1-069-11 2-069-7 Mr. Darrel G. Eisenhut June 18, 1979 Response - Unit 2 The sparger, located inside the CE steam generator, is not welded to the piping.

Instead, a thermal sleeve fitting is used.

Details of the weld-ing process used by CE to make the nozzle to safe-end welds is enclosed.

Also enclosed is the welding procedure specification used to make the piping welds.

Details of welding such as pre-heat and joint configuration are included.

Backing rings were not used.

Post-weld heat treatment was required for all welds.

Very truly yours,

& w id C. 7 4 8 David C. Trimble Manager, Licensing DCT/M0W/vb Attachments 1

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Quality Conti,61". o,ation Mat e rials & E.a. b ric l

BECHT EL POWER CORPOR ATION t.

Servicce WELDING ST ANDARD 4

Welding Procedure Specification

., b.4Z, Pl-AT-Lh (CVN)

Pre pa red 35 717.

f_i,,

r3 y Vic e President of Revision 0 Date 1/22/73 Approved _ */%e/ e G.

B. Grable Enpineering Aut hori/cri for use only when sinned by the Vice President of Er.cineerinc.

This welding procedure specification must be used in conjunction with the General Weldine Standa rd(s) GWS-FM.

Combination manual gas tungsten-arc and shielded rnetal-are welding of Sc ope:

impact quality carbon-steel piping materials using the open butt technique without an This procedure is to be used where imnact uranerties a re reouired.

int e rnal ga s purue.

Typical Joint Design t Base Metal: Ca rbon steel k I E d' --.} %)7'2 2

3 W elced to Carbon steel ASME Sect. IX: P#

1 to Pit 1

1 i !

/

\\

il M

Welding Process: Gas tunesten-arc (GT A) and y86 - b?. ____$

n+i I

nhielded metal-n re (SM A) t

- i Filler Material SF t 5, I R/ AWS A5.18. Cla s nifi)

I i

I r-'O c - 2 a n d 9 F A 6.1/ AW S A 5,1. Cl n s H -]

TirtCKNESS 3 /16' TI-iROUG H 3 /8" e M i c r.

7 n c m c-r-'nic

( Nei n H l

%e

~

o m o f

AS'dE Sect. 1X: F# 4N6 A#

1 l

~

I

\\

Position (s) Qualified:

Ali nositione.

l

,d r- - - -

)

o

,, t y n2

+

Thickr.e s s Ra nc e and Diameter Qualified i

3p

-O^

y

}lI 3, f,'.c5 A s - w e li. c d.

\\

I up to 3" O. D.

min. 3 /1 Ao max. None

'/'" *- G2 /

I m --

l#

t i

3" O. D. and over min. ! /16u max. 3 t" 1 C " " _ ._i) r-Postvccid Heat Treated:

'y'*

F 'S 7 o

~

i, o.

up to 3" O. D.

min.1/_16 n max. N c.n n

, _L i

32 l

T_ x }'p?'

u 3" O. D. and ove r min. 9 /16" max. 5 3" q-1u

.L l

". Ba cking Material None TlHCNNESS GREATER TIMN 3 /S--

j

. reheat Temp. -

o, u

30 F.

Int e rna s t emn e r a q,

..in.

(,

ture 350 mammum.

/ Po stweld Heat T reat: When recuired. 1150 F I 50"F 1 h r. /ir.. Mi nimum of 1 ha t

Apolic able Prec e c.ure Our.lification Recor<1(c.) POR _19 and POR-20, I'OR - 8 anci POR -11 l Pr ecocia re Gunlified t o: ASME Section IX na ASI:E Section III. Pa ra c raph N-541.

Welding Process l

GI A l

GTA

[

SMA C Sh1A

{

SMA l

)

Layer Numbe r 1

2

[ 3 & Rem.

R ernain de r l Remainder l T ravel Suced Hn. / min. )

2-11 2-11 l

2-11 2-11 2-11 I

Amocrare Ranye 60-100 l

60-100 l 70-100 115-165 140-180 i AC/ DC Pola rity DCSP I

DCSP l

DCRP DCRP I

DCRPl i V olt a c e 12 16 12 -16 22-28 22-28 22-2g t

a Torch Gas - cfh.

A rgon Argon 18-25 18-25 Backing Gas - cfh.

None None Elettrode !>ia me te r 3/32" o r 1/ 8" 3/3.'."o r 1/ 8" l 3/32" 1/S" 5/32" l

, o r 2 c T b m. h o r 2'

'! h o r. l 1

fY.s

% rvnn nin Di a rn at e r 1/ s" l3/9"o r ! / s" l l

l

~

'u Additional Inst ructions h te 1:

File the top corner at about 4 5 to produce approximately a 1/32-inch land I

thichnens.

I Note 2-AW3 A S.18 may be used 'vhen i<lentical to ASME SF A-5.10. AWS A5. I may be'

[

u.md when identic al to AS M E SF A - 5.1.

P.g e j,,<. 1

CHATTANOOGA, TENNESSEE

~

~-

m l

b N" N RobEDUhE December'8,' 1971

. DE pate:

Il0 A-

- Zgy l

M6P6.1.1.2 FOR. WELDING f 1TO 1 3

References:

MSP4.3.8.5'-

Groove'

1. IYPE OF MELD _

Qualifications:

Permissible Welding SAA-13-10 Positions!

Flat 2-1/ 2" thickness.'

QSAA-11A(1)

QMA 11A(1)F4 Qualified on t

THIS WELD SHALL BE EXAMINED BY.NON-DESTRUCTIVE ME (WPAS).

AS ASSIGNED ON THE WELDING PROCEDURE ASSIGNMENT SHEET Beat Treatment:

250 *F and maintain until welding

' ~

Minimum Preheat & Interpass is completed.

. oF.

500 Max'imum Preheat and Interpass Hold Preheat Until a'P.W.H.T.'

1100 F (+50*F), hold'-.15. minutes minimum.

Final P.W. H.T.

1150 e F (+25 F), hold.one hour per inch weld thickness.

Intermediate P.W,H.T.

Welding Parameters:

MA.

sAA 3/16p Mil B-4 E-7018' Type of Ele'ctrode size &

Linde 80 (20 x 200')

Type of Flux

' ~ ~

13 Travel Rate, ipm' Welding Amperagt & Polarity 650 Amps

..AC 30-31 As below Voltage y'_ Backing %ar in yof ()$e cf Other CURRENT RANGE FOR'MA ELECTRODES

. c Size Position Amps.

Vo.lts (DC-RP.)

115-145 24 1/8 Flat 165-205 25

~

5/32

'N 210-260 3/1'6

'325-375' 2,5 /

)

1/4

.i s

e

'q

^

F

'. v.yy

$m terunrregwnganggpg,-

Power h Industrial DECHTEls COR POR ATiMm&Veriais & Fabrication Division Welding Procedure Specification Quality Cont rol,Fe rvice s g 7

y BECHTELyGg & Q7;.p'g,3 D

., s L %

c P%

By (

_ h ho.

Pl-AT-Lh (CVNhRKANSAS Nt Mr04f

]h e

i Manacer of Encineerine Revision 0 Date 4 /15/71 G. B. Grabl6 i

Authorized for use only when siened by the Division Manacer of Encineerinc.

This welding procedure specification must be used in conjunction with the General Weldinn Standa rd(s)

GWS-FM Scope: Combination manual gas tungsten-are and shielded metal-arc welding of impact quality carbon-steel piping materials using the open butt technique without an internal This procedure is to be used where impact properties are required.

cas pu rce.

Base M etal: Ca rbon steel Typical Joint Design 4-.

Welded to Carbon steel Yg' t Y)' - -

ilY $ 2Y 2

2 I

ASM E Sect. IX: P#

1 to P#

1 g

Welding Process: Gas tuncsten-arc (GTA) and yni tj g

shicided metal-a rc (SM A) cqnq g

)

{

l Filler Material SFA -5.18/AWS A S.18, Classifi-cation E70S-2 and SFA-5.1/AWS A 5.1, Cla ssi-

-THICKNESS 3 /16" THRO 10 t i g-

"[12 fication E7018 (Note 2) 30 ASME Sect. IX: F#

.i h 6 A6 1

r--k

~ Position (s) Qualified: All positions

,,'y L-y*i'9, R y~i g e{

Thickness Range Qualified:

(Note 3) g

6. 1

~

A s-welded:

M in. 3/16" M a x.2 -1/4 "

+ b2

\\

Postweld !! cat Treated: Min. 3/16" Max.2-1/4"

~#

9t-I ag

\\

t-p

,,,g ng y a;cf;a; gnng i

p d F- /,,

,p, t M i n. Preheat Temp.

60"F (Nite 4)

At_e_rys s s t e m oc ra t u r e 3 5 0"F ma x.

__L

- 52 p -Postweld Heat Treat:(When renuired) one hour /

y - L ~ yy' jyg h a t H nD F - 1200 F (refe r t o H ir-! OO & B ir-501)

Tl!!CKNESS GREATER THAN 3/8 A}ynlicable Procedure Qualification Record (s):

PO R -19 h PO R -20 Procedure Qualified to: ASM E Section IX and ASM E Section IH, Pa ra. N-541 Weldine Process GTA GTA SM A SMA SMA La yer Numbar i

2 3h Rom.

Remainder Remainder,

Tra vel Sneed (in. / min) 1-6 1-6 2 -11 2 -11 2 - 11

}

Amperace Ranec 60-100 l

60-100 70-100 115-165 140-180 i

A C /DC, Pola rit y r>cc:p l

QfCSP DCR P DCRP DCRP Voltace 10-16 10-16 22-28 22-28 22-28 Torch Gas - cfh.

A rgon A rgon 18-25 18-25

"~

~"

~~~

nacking Gas - cfh.

None None Electrode Diameter V3 2" o r 1/P." 3'32" o r 1/ S" 3/32" 1/8" 5/32" l

Tu nge n T v oc F/c-2 % 'I h o r, l!":-2 % T h o r.

F i l l e r *.'.'i r e Di a m e t e r 1/8" l3/32" or 1/S" Additional Inst ructions Note 1: File the top corner at about 45 to produce approximately a 1/32-inch land A

thichness.

Note 2:

AWS /s 5.18 may he used when identical to ASME SFA-5.18 AWS A5.1 may be used when identical to ASM E SFA-5.1.

Nc.tc 3:

See PHT-500 for maximum allowable as-welded thickness permitted under the pa rticula r Code governin;; the fabrication.

PageIof2.

t l

- r - r

--e s

IO.

Welding l'rocevlure 4pecification M

PI-AT-1 h (CVN)

}tevision 0 Date l/15/ 71 l

A<ltlitional innt ructions (Cont innesi f rolli l' age 1)

Note.1: Sec Drawing GWS-FM.) for special civettmstances where higher pre-heat tempera titres a re regttirett.

r I

S i

l Pape 2 of 2 t

}

TDR-TMI-113 Page 2 Index of TMI-2 Recovery ProrTam Construction hsks

'1hsk No.

WG-1

Install Auxiliary Building / Fuel Handling Building Offgas Filter System WG-2 Install System to Decontaminate Water in Auxiliary Building Using CAP-GUN Ion Exchange Method

-6...

..___,_ Install Radwaste Liquid Storage Vessels in Fuel Pool ' A', _. -.

i WG WG -.

Install Water Chemistry Laboratory for use in Conjunction with WG-2 1

I WG-16 Install Cap for Auxiliary Building Vent Stack (for WG-1 above)

TS-3C Instan System for Lang Term Cooling of Steam Generator

'B' TS-6B Install Bcternal Reactor Coolant Pressure Control System TS-10/11 Install Two Back-up 2500Di Diesel Generators and Distribution System for Balance of Plant Loads TS-15 Instan Back-up Decay Heat Removal System 1

1063 Install Condenser Vacuum Pump Discharge Filter System l

O e

l

8 7/M N (A.)(j-l 4

AUXILIARY AND FUEL HANDLING BUILDINGS SUPPLEMENTARY AIR FILTRATION SYSTEM (Task WG-1)

A.

FUNCTION The primary purpose of this system is to provide supple-mentary. filtration for the air that is exhausted to che __

atmosphere frcm the Auxiliary and' Fuel Handling Buildings.

~~

The filters act to remove radioactive' particulates and iodine from the building exhause air, thus providing additional assurance that the air discharged will be well within the exiscing environmental release 11micacions of che NRC.

To ensure sys tem safety and reliabilicy, backup electrical power supply is provided for the system exhaust O

f m..

R,eacum moni=ots a=e es taued to monicar au the air exhausted to the atmosphere.

B.

SUMMARY

DESCRI? TION The supplementary air filtration system is located on the Auxiliary Building Roof and receives the air which has already been filtered by the existing exhause syste=s.

Four identical filter unics are provided in parallel, each consisting of a series of high efficiency filter elements.

Air from the building exhause is first monitored for radio-activity and then flows chrough the filter crains.

The air leaving each filce: is again monitored for radioactivity and then exhausted to che ac=osphere by an exhaust fan.

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AUX 1LiARY' AND FUEL HANDLING-AlR FIL TRA 7~1oM SYSTEM

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he structural steel supports for the filter housings, ductwork, and fans were anchored to the auxiliary building roof using Hilti concrete anchors.

The concrete anchors were set after the existing built-up roofing and existing cof concrete down to the top layer of reinforcing. steel was removed.

This procedure insured a high structural integrity without cutting through any rainforcing steel.

After all anchorage work was completed, the area of concrete removaf was filled back to the original surface elevation with grout.

The structural supports were arranged and welded as detailed on the design drawings.

The supports were erected in a coordinated manner starting with the sourthern most filter location and proceeding northward to the northern most, his arrangenent provided._s.ximum storage and fabrication area on the roof for the filter assemblic's and maximum mobility for a 15 ton hydraulic crane placed on the roof to support construction.

The four Mine Safety Appliance filter units were delivered in three sections each and field welded together to form complete units.

The three sections co=prising filter unit consisted of the following:

M eq a

h

" 'fask"WG-1.

a) moisture separator and heater unit b) EPA filter unit c) carbon filter and EPA filter unit Inlet and discharge plenums were shop fabricated and welded to the respective ends of the filter units. These completed assemb1ies were each air pressure tssted to one pound per square inch gauge pressure and accepted.

- Ibe inlet and discharge duct was shop fabricated and bolted together in the

~5ield. The ductwork betweef t5 locat'loEo? the stacE~ tie'-in and the d5p~ers

~~

' ~ ~

on the discharge duct was pressure tested'.to one pound per square inch gauge.

In addition, the inlet duct between the stack tie-in and the inlet plenums was vacuum tested to minus six inches of water gauge.

In preparation for the stack tie in, the connection angle was welded to the skin of the transition piece.

The adjacent duct work was then welded to the 1

-connection angle.

'A plywood air lock was constructed outside the duct access door.

Into this airlock a 1500 CFM flow of air was =aintained during cutting into the stack to assure that air flow was always into the duct thru the duct access door.

This flow of air prevented any air from the stack to discharge directly into the air lock. After completion of the stack tie-in the filter units 1 and 2 were activated and run with temporary electrial installation.

Filter units 3 and 4 were completed with pemanent electrial installation cn May 6th.

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AUXILIARY BUILDING EMERGENCY LIQUID CLEANU? SYSTDi O

msk

-2 "Co-- I1" Eu=o= Svs =e=>

A.

FUNCTION The primary purpose of this system is to decontaminate approximately 75,000 gallons of radioactive liquids which were pu= ped from the Reactor Building into the

- --- - Auxiliary Building su=ps and holdup tank before the 77.--

Reactor Building was isolated.

The functions of~the'

~

~

system are:

a.

To decontaminate radioaccive waste water by filtration and ion exchange.

b.

To transfer the deconta=inated waste water to the Liquid Waste Disposal System of TMI Unit 1 for discharge or further treatnent.

Q c.'

To provide remote handling of spent resin containers from their position inside the Chemical Cleaning Building to the transport cask and cruck.

d.

To perform the above wh'ile limiting releas es of radioactive =aterials to the environment to "as low

'~

as reasonably achievable".

B.

SUMMARY

DESCRI?TICN The Auxiliary Building E=ergency Liquid Cleanup System is I

a radwaste process system which utilizes a prefilter, two ion exchangers, a resin filter and a 1-micron post filter.

l 4

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i 4'

l It is located in the existing Chemical Cleaning Building.

Contaminated water will be pu= ped from the Unit 2 Miscellaneous Waste Holdup Tank by a pu=p located in the Chemical Cleaning Building, through the yard, and into the process system.

Yard piping is enclosed within a shielded guard pipe.

Decontaminated water is_either pumped,to the. Liquid Waste, _

Disposal System of TMI Unit i for discharge if within

, limits, or recycled through the waste process system.

The Chemical Cleaning Building has been cade into a low leakage confinement building and is provided with an exhaust ventilation system to maintain the building at a negative pressure.

E?A and charocal filtering is O

~

prohded on the ventilation exhaus t system.

The filtered air is exhausted to a local stack at the roof line of the building where all effirent air is mo'nitored for radio-activity.

Normal operation of the process system is by remote means except for infrequent operations such as sampling and chemical addition.

All remote system operations are controlled and monitored from the TV Monitor and Control t

Building located adjacent to the Chemical Cleaning Building.

Remote handling of spent resin containers from their position inside the building to the transport cask and truck is provided.

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- Task WG System for Decontaminating Water in Various Auxiliary Building Locations Using the CacGun Ion Exchange Methoc

' CONSTRUCTION HISTORY:

& Chemical Cleaning Building An existing building is bein7, adopted to contain the CAPGUN Ion Exchange equipment, including tankap for clean water, and tankage for water that required reprocessing By 4-22-79 work had started erecting support steel and a monorail to support a 20 ton hoist for handling the CapGun Filter and Resin Tanks. Monorail i.

- electrical connections were completed 5-4-79 except for permanent power.

Electrical tests for the electric hoist are scheduled for 5-7-79.

Lift

~ ~'" ~ ~"

testing is on hold pending Engineering analysis of support steel structure.

A major amount of piping is included in the Chemical Cleaning Building, involving approximately 1600 welds. As of 5-4 i this work is 45%

complete.

W -19 p r 'fs c r -, ';

As of f-+r?9 the conduit junction box work in the Chemical Cleaning Building is M complete.

• / d is!

g 7J' As of G-*=ff the cable installation and termination work is FA complete.

.r-r-2 7 Painting and cocoo'ning of the Cherical Cleaning Building is being worked on a non-interference basis. Luc ^~

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Chemical Cleaning HVAC Building The HVAC Building is designed to keep a slight negative suction on the Chemical Cleaning Building and to filter the suction air before discharge to atmosphere. This is a new structure, and construction was started one week after the need was established.

As of 5-4-79, building status is as follows:

' Foundation and Walls complete.

- Roof partially installed.

HVAC Filter and Fan Unit installed.

Electrical Tray and Cabling Work in progress.

^

Duct Work /4C % complete.

O Doors (3) 40

% complete.

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e Page 2 Construction History (Continued)

O Painting and Sealing d

% complete.

Electrical Work So

• . complete.

Instrumentation Work d % complete.

Unit Testing O % complete.

8. Yard and Tie-IN Picing

^

~~'-~5 1.

Process line (shielded) - Suction from"lo'wer it vel Auxiliary Building.

~

~T" As of 5-4-79 this line is completed from the Chemical Cleaning Building

-b into the Auxiliary Building. Shielding is essantially complete under-ground except for approximately 20'0" of oneJete pour on the west side j

of the Chemical Cleaning Building. This will be completed after instal-i lation of the Air and Demin Water Headers. Work has been started on the vertical shielding.

)

i Process (shielded pipe)

TC % complete.

Shielding Jo % complete.

2.

Demin Water Supply - Complete except for final tie-in.

3.

Service Air Header - Complete, e4 %~IT--Ete-4n..

4. ' Clean Water Return - Yard work completed Completion of final tie-in FU % complete.

k Chemical Cleaning Control Building As of S-4-79, the building structure is complete. The control MCC distri-bution panel, step down transformer and instrument panels are located, piped, and partially wired.

Conduit in Chemical Cleaning Control and to Chemical Cleaning Building

/cc % complete.

Cabis pulls in Control B' uilding and to Chemical Cleaning Building "

complete.

[ % complete.

Terminations

%. Monorail Structure and 20 Ton Hoist As of 5-4-79, the structure, the monorail, and the 20 ton hoist are installed. Cabling is complete to the hoist.

d % complete.

1.

Electrical Test of Hoist /

2.

LiIt Test on Hoise /W % complete.

- * ~ -~ 3. Pahting and Dress Up [ t complete.

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' Page 3 Construction History.(Continued)

O 4.

st-natsen a s a-is ens

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k.

Installation of CapGun Suoplied Equiement None installed as of 5-4-79.

Pump installation 6 i complete.

~

Tank installation d

% complete.

. Shielding installation o % complete. _

--- --... --..:.. _... i.

1. TV Installation Control Console o T complete.

Cameras o

% complete.

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014-6 FUEL POOL WASTE STORAGE SYSTEM O

(Tasw Wo-e "rena r==")

A.

FUNCTION The primary purpose of the system is to provide a temporary storage facility for radioactive liquid wastes and be able to retrieve these wastes for future processing.

This storage facility is located in the Fuel Handling Building

~

~~

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in tie'Fue1 Stoi~ age'Po'o'l ec~

Tvide nii' liquid Va'sces sich ~

extensive shielding in a controlled environment and assure maximum protection for de plant personnel and public.

Additional shielding is provided to cover the Fuel Storage Pool in the form of two foot thick concrete slabs.

This i

storage facility will allow the re= oval of high level wastes 1

from the Reactor Building or Auxiliary Building for holdup -

O so the buildings can be decontaminated.

B.

SUMMARY

DESCRI? TION j

The Fuel Fool Waste Storage System capacity is provided by six canks to provide greater than one hundred thousand gallons of high level radioactive liquid was ca.

As shown on the attached sketch, the waste will be either pumped from the Reactor Building sump or the Auxiliary Suilding Wasce Tank to the six tanks in the heavily shielded Fuel Storage to the ' anks is Pool.

The transfer line from the pumps t

provided with lead brick shielding within the Auxiliary Building and Fuel Handling Building for personnel protection.

During filling of the tanks, the air will be displaced to

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From here the vent air is directed to the Fuel Handling Building exhaus t filters.

The liquid wastes will be held in these storage tanks until the future radioactive liquid waste processing facility is available to sa:. ly dispose of them.

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5-7-79 p

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1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> MIAL JG(

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Purpose:

This task provides 110,000 gd ons =f additi6 al storage I

apacity. Th's stem as cur en y designed has two. paths of 1111ng.

tie o Contain ent 3 11 ding Spray 1 pro, ided t El-25 -6 in : e Auxil iary We ding.

The se nd

le s to Ra waste Disposal.1 scil..anecus L quid: downstr am of

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eMiscill'agusWasteTask.ain ? umps. I addition tie.

Z to WG-2 Cap Gun in e vided in the Auxiliary B u t i d in rt.

&, 0by & CTsaN V/S M

?-9 : ui r: The original ochedule for this task had a duratien of nine days for all construction involved. This was based on 9 ECM's that were knsvn when the schedule was developed. Currently 37 ECM's have been generated for this task with numerous re-

, visions for each ECM being the no =. Additionaly at least 3 ECM's are still being work on in engineering.

PROBLEMS:

4 RWP - HEALTH PHYSIuS - FUEL BUILDING:

Problets due to the unfamiliarity of the various craftsmen.and supervisien with the procedures to obtain the necessary approvals and the processing of RWP's

~;~'

caused a delay of approximately 1 to 1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> per shift change for about the first week of work in the Fuel Building. Comp-ounding the problem was the require ent for protective clothing because contaminated areas in the building, this requirement added hour per shift change, however the task area was decon-taminated by the second week of work incide the building.

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4

,4 a

Crane Availabilty:

A. major obstacle to complete this system was the use

()

of Fuel Building Crane. All material require'd in the building had to be backed into the building on a truck and lifted with

'the building. crane. A supervisor was given the responsibility for determinating the priority of the lifts to be made by the

"~~

~

_ crane, in addition he was responsible for scheduling the various 4

trucks into building to support these prioriti_es.

Primary Samole: Until the plant operating procedures were revised it

~~^

was necessary to close the access door and exlude all craft from the Fuel Building during the drawing of a Primary Sample.

Since Unit 1 HP was closed down during this period a entire

- - ~ ~

~

shift was lost during each Primary Sample Draw.

Hanpower: An estimated four days were los,t on the schedule due to the O

- lack of sufficient pipe fitters - welders to adequately man the job. Lack of manpower continues to a problem.

Auxiliary Building: Major obstacles to starting work in the Auxiliary 3

Building were -obtaining sufficient quantities of breathing air, construction of an air lock and obtaining.aufficient electrical power to operate welding machines, welding fume exhausts, etc.,

.. _.. _ _. ~ '..

RWP - HP problems. Compounding the problem was the interface with Met-Ed. The original schedule never addressed or glossed over the problems encounted in the Auxiliary Building. Due to the lack of as build information the pipe routing in the Auxiliary Building required several changes as interferences were discovered during system walkdowns.

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3 Shielding:

Design of shielding has lagged behind the rest of the system O

V design. A estimated 2 day delay occured in setting the tanks because of the need to provide shielding around the Hydrogen Reconbiners. Conceptual design of the piping in the Auxiliary Building has only now been completed.

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IDNG TERM STEAM GENERATOR "B" COOLING SYSTEM (Task TS-3C) g9 A.

FUNCTION The purpose of the Iong Tem Steam Generator "B" Cooling System is to provide an alternative to the existing method for cooling the reactor core.

The existing decay beat removal system removes the heat by recirculating the

~~~~' reactor coolant through a heat exchanser in the Auxiliary 7

~

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Building and transfers that heat to the river water cooling system throu6h an intem ediate closed cooling system.

The Long Term Cooling System functions in an identical manner, but offers the additional advantage of not circulating the contaminated water in the reactor vessel outside of the Reactor Building.

B.

SUMMARY

DESCRIPTION The existing "B" steam generator functions as the primar/-

heat exchanger in this system. A new cooling loop is installed which circulates condensate water through the steam generator, removing heat frem the reactor coolant, and rejects that heat to the river water cooling system through an intermediate cooling path.

The system also provides a clean-up path through a demineralizer system to remove any low level con-

+mMution which might be present in the condensate water system.

The system relief vents are routed through a series of filters to remove any contamination, and the system lines are equipped with radiation monitoring equipment as an additional precaution.

The system pumps have connections to

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an independent back-up electrical power supply to ensure system reliability.

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'T 'Ibe engineering and procurement for this system required an early definition of the requirements in order to place an order and obtain delivery of the heat exchanger and circulating pump.

Flow diagrams and piping drawings were issued on April 22.

Engineering Change Memorandums (ECM) were produced to cover necessary Large bore and some amn11 bore shop fabrication.

In.... _.

addition, since that time, about 35 ECM's have been issued for details such as the temporary and per=anent demineralizer system, system interties, pipe supports, condensate pump and house service air co= pressor bearing cooling water, surge tank and raddler, control, instrumentation and electrical wiring.

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b The' W beat exchanger was received from B&W and set in place on April 22 Large Bore piping was first shipped on April 25. Alignnent of the heat exchanger was completed on April 26. In the meantime main steam and feedwater tie-ins were proceeding and blind ' flange connections were being installed in the feedwater lines.

Pipe fitters started main pipe welding on two,10 hour1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> shifts, 7 days / week starting April _

7 At this time, the completion of construction was scheduled in order to have hydrostatic testing on May 9 As large bore,

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spool pieces, considerable fit-up work has been necessary.

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necessitating fabrication of a 30" elbowlet on site.

At present, the hydrostatic is scheduled for May 13 The additional spools and welds have accounted principally for the delay. However, order to give some personnel time off, the activity for this task was shutdown on Sunday, May 6.

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STANDBY REACTOR COOLANT PRESSURE CONTROL SYSTEM O

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A.

FUNCTION-The purpose of _ the Standby Reactor Coolanc Pressure System is to provide an alternace means to =aintain the Reactor Coolant Sys tem pressure to avoid reliance on the instrumentacion and controls in the existing system within~che' React 6r Building'.

TheTys tem also 'will compen- ~~

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sate for any leakage frc:E the Reactor Coolanc System by automatically providing makeup water into che system.

The sys tem is tied into the existing Reactor Coolant Makeup and Purificacion System, and is located in the Fuel Handling Building.

Redundant level ins crurentacion Q

and, a backup. electrical pcwer snpply for the Charging Pu=ps "is provided for reliabili:7

-B.

StFRARY DESCRI? TION (See Attached Sketch)

In the Standby Reactor Coolant Pressure Control System, three ShrgenTanks are arranged in series to provide for insurge to the Reac:or Coolant System and are pressurized with nitrogen to che desired Reactor Coolan: System.

pressure.

As water insurges to the Reaccor Coolanc System, level is maintained in the Surge Tanks by the Charging Pu=ps which obcain makeup water from the Charging Water Storage Tank.

Boraced water for the sys tem is obtained by mixing deminer-ali:ed water and boric acid in the Borated Water Bacching

' 'h Tank.

Once mixed, the borated wa:er is transferred to the Storage Tank.

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BALANCE OF F W N O U

-(Task. TS 10/11)

A.

FUNCTION The primary purpose of the two 2500 K.'J. Diesel Generators lectrical power to selected essential

-- ----... is to provide e=ergency e balance of plant electrical equipment in the event of failure

-This i$stailation of the normal off-site electrical power.

will alleviate the dependence on off-site power and l

increase the reliability of the plant recovery systems.

SUMMARY

DESCRI? TION B.

The balance of plant auxiliary electrical system buses 2-3 and 2-4 are nor=rily supplied wi.th 4160V power from the AnU. liary Transformers which are fed frem an off-site power U

Loads supplied from these buses include many systems supply.

To ensure that reliable the recovery effort.

~ required to support i

electrical power is always available for these systems, two emergency diesel generators have been inscalled as a back-up in case of failure of the normal off-site electrical power.

the One diesel generator,DC-A (GRAY),is connected to bus 2-3;

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2-4.

other diesel generator,DG-B (vaite),is connected to b6s l

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te Booster ing circuit breakers which wete used for the Con ensa The relaying and control

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d he circuits of these breakers have been modified to provi e t These breakers are operated from the necessary pro teccion.

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After the diesel generator is up to speed and voltage, the generator circuit breaker is auto-matically closed, placing the generator en the 4160 volt

=..

then manually load the. generator in.

bus.

The operators accordance with a predetermined loading schedule up to i

che racing of the generator.

On loss of power to bus 2-4,.

diasel generacor DG-3(White) scarcs and is loaded in the same manner.

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CONDENSER AIR ETGACTION EXEAUST FILTRATION SYSTEM (Task 1063)

A.

FUNCTION

-The purpose of this system is to filter the air removed from the plant's main condenser prior to being discharged

- ---- to the exis ting exhaus t system.

Thus,. even if the water anteiing the To~n~ denser beTeces c~oEia51nated due ci pfima'ry

~

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to secondary system leakage, any radioactivity in the air and vapors exhausted from the condenser will be' removed.

B.

SUMMARY

DESCRIPTION The system consists of a filter unit containing a series of high efficiency filter elements and an exhaust fan.

O The.nor=al at: ascharge path is closed, and all the air is routed through the new filter train.

The system is des'igned

~to" filter out 99.977. of the elemental Iodine which may be present in the exhaust air.

Radiation monitoring is provided in the exhause syseem downseream of this unit.

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