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Special Operating Procedure Z-103 Re Water/Water Cooling for once-through Steam Generator B
	ML19221A539
Person / Time
Site:	Crane
Issue date:	04/13/1979
From:	; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:	;
References
	OSP-790413, NUDOCS 7905230155
	Download: ML19221A539 (9)
	v • d • e

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__ i APJ001-Three %!e Idand Nuclear Station SIDE 1

-r rgure 1001-8 Special Operating Procedure SO P No. Z~. ~IOd-(r,am 5cP Log ind.s)

Un,t No.

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bot,oc Foz 8" C T S Cy 1.

Title 2.

Purpose cincioo. pu,p.. o, sor, 3.

Attach procedure to this form written according to the following format.

A.

Limitations and Precautions 1.

Nuclear Safety 2.

Environmental Safety 3.

Personnel Safety 4.

Equipment Protection B.

Prerequisites s

C.

Procedure t.

Generated by Datt 6.

O uratio n of SD P - sn.n e no ion, in.n so o.,.,,om in, m.c.., e.. o, is, ser, t. or ce s e.io. _.nien., occo,. vi,.t.

b exi Trh or new permanant (a)

SDP will be cance!!ed by incorpora!

procedure subn.itted by O

O (b) SOP is not valid af ter uni in.i,..,,,,.n.-

A> n.ni,...ii in so r 3.in, c.nc.n.oi S.

(a) is the procedure Nuclear Safety Re!ated?

Yes O No O If "yes", complete N uclear Saf ety Evalp tio isio[2 o,inie ro,m (b) Does the procedure affect Environme ma P tection?

If "yes", complete Environmental Efuah an. [o Yes O No 2c ini. r o,m>

j (c) Does the procedure af fect radiation exposure p so n n e l?................... YesO NoO NOT E:

if o u e n.....,. no, in, en.ng.

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Review and Approval Approved - Shif t Supervisor 31W -

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Reviewed - List members of PORC contacted g

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Approved - Unit Superintendent e...

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SOP is Cancelled s

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~ SPECIAL O?ERATING PROCEDUpI c-23 LUM / 2 con ric roc ua 4 Fog B 67.sG TITII:

J. L:.Lo '..her-Ccolir.g-4katJeents1 :'a_ un-the "' "-Stean-Generatar J

k I.

Puroose:. To convert the "B" steam generator from an isolatcd secondary side conditica to a heat re= oval = ode with the secondary.s!.de ccanected to a closed cooling vater system.

II.

Initial Conditiens 1.

The "A" steam generator is in operation with pri=ary systca heat

' ming re=aved by norcal feed and stes lng operation.

One cain coolant pu=p is operating.

2.

The plant =odification for installation of a pu=p around closed coolir.g ater system has been co=pleted and preopercti nally tested and flushed.

Systca constructed in accordance with design criteria.

3.

Steam generator "B" is isolated on the feed side with feed supply velves__F_J-V17B, W-V203, FJ "143, W-Vl9B, Fj-V263. and startup supply valve [J_-V23B all shut.

All four Main Steam Isolation Valves are shut.

4.

Fri.2 ry system flow to the "B" steam generator =sy be 1:. :he noral direction with a "B" loop reactor ccolant pe=p in operatica of pri _.2ry syste= flow cay be in the reverse direction with B Icop pu=ps idle and a reactor co clant pt p in operation in the A loop.

5.

The pri=ary system te=perature has been reduced ac lov as practical by stee=ing heat renoval :ethods on steam generator "A" (approx. 220 F).

6.

The closed cooling water system connecticn to the. turbine bypass steam line dcun stream of the isolation valveMS -VISB is esse =ed to have been

=ade up, filled with rater including the portion of the bypass steam header to the next isolation valve (or cnyped connection).

7.

A sc=ple of secondary side rater has been drawn from the "B" steem generator and analy:cd by appropriate HP and Che=1sts to deternine that circulation of such fluid cetivity vill not cause indue dose rate or unplanned activity release to the enviren=ent,,

8.

T SO vater icvel is in the 350" to 400" range.

J III.

procedure A.

Filling secondary side with unter

- 1.

Precautions a) The steam generator secondary side cust be filled slowly-to avoid excessive cooldown of the reactor coolant systen and to avoid a water ha==cr in the steam line.

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- b) The fill water chauld be within 100 F of the steam generator tube bundle to avoid stress es resulting from thet. a1 shock c)

Co= unications should be established between control rooc cperator responsible for syste= pressure and the operator performing the filling operation.

C m unications should also be established between an observer stationed at the = sin stesm lines where they penetrate containcent.

d) During the fill procedure the rate of feed addition is purposely slow to caintain steam generator water inventory to be as near the caturation te=perat.:re for the secondary sysrem pressure as possible.

G en the succm lines are being filled the feed flav rate should not be increased since it is desired to fill the steam line slouly with saturated vater.

Increased feed flov =2y produce rate r h---r.

At the feed rate specified in the procedure it =ay take as cuch as 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months to cocplete steam line fill.

e) The cuziliary feed line are assu=ed dry by this procedure.

If full then the ti=e reouired vill be reduced to co-plete fill.

Fill cc=pletion vill be indicated by increasing stes= generatcr level.

f) The last step in the fill procedure utilizes the closed cooling water system to cceplete steam generator fill.

The plant feed I

and condensate system should not be used to ce=plete the last foot of fill since an increase in reactor coolant te=perature vould produce a corresponding increase in secondary side pressure when in a solid vater =cde.

The feed system check valves prevent relief of such pressure surge and the steam lines only provide protection st normal safety valve set points.

2.

Pethod see Sketches' 01 & #2

2) The nor._al main feed and condensate supply system is utilized for the filling p,rocedure, b) Control of the rcte of feed is by utilizing the Start up proportional control valve, N-V253.

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c) The initial rise in steem generator Icvel is utili' zed to establish a setting of the supply valve FW-V25B to establish a rare of feed that, if =sintained, vill ulticately fill the steam lines without vater h - r.

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- -......E e) The feed volt e necessary to fill the stess lines (frou isolation valves - V4B, V73, and VISE to the stcem generatoc) is calculated to be 1C,000 gallons and at the feed rate established vill take about 6 h:urs to fill.

This assu=es steam pipes are presentiv drv vhen cetually, stccm condensation cay have caused sub-stantial filling of these pipes alremdy.

f) After ste2= lines fill then steam generator Icvel is slowly increased to the level of the c__ergency feed no::les.

The precaution is tcken that the c ergency feed lines cay be c.=pty ced can prcduce a water h - ar if not treated carefully.

Actually, it is expected that the energency feed lines cre full cad have been kept full by steam condensation.

g) Final fill is perforced utilizing the closed cooling water systc= vhich will provide ove:cpressnre control.

3 Procedure a) Establish condensate water inventory is sufficient and of the proper chenistry to co=plete this procedure.

It is expected that about 25,000 gallons vill be required for the fill procedure.

b) Align the plant feed and condensate system to provide feed flev utilizing the condensate pt::ps feeding through secured fe ed p t._.p s.

Booster purps are not necessary.

Nor=al condensata Inke up to the condenser hot vell cay be used.

UCTTE:

The p >ssible contanination of the Secondary side of "B" steca generator vill not cross contaminate the "A" steam generator since the condensate is only used for filling. and not for recirculation fron the "B" steam lines.

c) Ensure cain feed valve W-V303 is tagged shut and W -V14B, W-V17B cnd hP are checked shut.

Fw-V654 d) Record steam generator "B" level in inches and utilizing start up feed regulating valve W-V253 establish a feed rate to the steam generator of one inch per minute.

This vill be approximately 42 gym.

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.6 383 e) When full range Icvel instru=ent ind ic a te s c3Sd", adj us t flov rate of feed to approxt=ste one inch per minute.

Adjust as necessary to establish this rate for the next 12" of level increase and cake no further adjust = ants to the regulating valve FW 25B.

NOTE: The feed rate adjust =cnt establishes the proper feed rate for ensuring na water h__ ar.

Actual 12 vel increase rate vill becc=e sic mr due to leakage to the de.;nco=cr canulus at the Sensing line penetration.

This 1cckage rate vill increase as Icvel increases.

f) Itintaining the constant feed rate established in step e) allow steam ge3qgator level to increase. At full rcnge indication of ' 1

' it is expected that level increase vill i

stop since Icakage through the tube shroud at the sensing line feeding through should approxicately equal,pp.g. feed rate established.

If lavel continues to rise above

", reduce feed flow es necessary to =nintain =7dd!'A level.

Da not allov Icvel at this step to increase above 60"/.118 ~~

CAUTION: ISke no further adjust =ents to estchlished feed rate.

It is expected that it vill take 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months to c:=pletely fill the steam lines if they are dry at start of filling.

CAUTION:

The ran stationed at the = sin steam lines at the contaic=ent penetration area should report any noises or water ha==cr.

CAUTION:

Steady state pri=ary c.colant te:geratures should be mainta_ned to avoid producing a subecoled water condition at this ti=2 g) -se generator 1cvel vill again increase "

m lines ha

1ed.

Allow the 1 -

rise to the 535 to SS7" indication and aa;

~ r o hold level constant.

NUTE:

Th' 1 allow the outer 4 ud annulus to fill via the shro-penetrrtions for the icvel sensing __. '

about 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months es i=sted).

(

h) When icvel starts to rise, the outer annulus level is the sa=e as the indicated level.

Allow the level to raise to 603-606" on the full range indication gauge.

Adjust flow, as necessary but do not exceed flow setting estchlished in step e) to caintain this Icvel.

NOTE: At this gauge level the auxiliary feed noz les are being filled.

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1) When the steam generator level again starts to rise, the euniliary feed piping is full.

j) Allow the steam ganerstor level to in:rcase to the 612" IcVel cod adjust flav to caintnin this Icvel constant.

This =ay require securing feed flow entirely by closing FN-V25B.

A11ov

. steam generator secondary side tenperatures to stabilize for at Icast one half hour (30 nin.).

k) Align the closed cooling unter system to supply feed water and tcke suction frem the steam header connection.

Determine that the closed cooling water system has flav estchlished in the recirculatica code and pressures ecuali cd to the "B" steam generator feed and filled steam system.

vater supply [ T.:4B, -iJ-V263, c.adsC_-3 in the s tartuo feed-1)

Close valve branch line,c;d c;.ca -cci ee m "' h a r -uuo 4

ba --i n f.d 1..m.

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Slowly open the supply valve from the closed cooling system and cpercte the closed cooling unter system to cc=plete the fill of the "B" steen gener tor as observed by the full rcnge steam generator gauge increasing to the full level.

Then open the return valve.frca the steam linen to the closed loop cooling systc=.

n)

Ey cdjustmant of the closed cooling vater system pu=p bypess, cliew grcdual increar.e in the feed and recirculation flow rates.

CAUTION:

Since the closed cooling water, system water inventory vill be colder than the "B" steam generator secondary side, due precaution should be taken to not exceed the rece== ended 100 te=perature difference between feed no::les and tube bundle te=pera,ture limits.

CAUTION: The co--ancement of closed cooling vater flav through the secondary side of steam generator "B" cay reduce primary coolant te=peratures core rapidly thsn the pressurizer is capable of cerpensating for. The operator controlling closed cooling i ater system forverd flov =ust be in cc::unication with the operator responsible for pressurizer pressure control and caintaining etnicum NPSH for reactor coolant pu-ps, o) Tag Shut FW-V263 and n, vl35 to taintain isolction of plant feed system frem the closed cooling va.ter system.

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ML19221A539

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