ML19221A252
| ML19221A252 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/11/1979 |
| From: | Wallace A BABCOCK & WILCOX CO. |
| To: | |
| Shared Package | |
| ML19221A253 | List: |
| References | |
| NUDOCS 7905210074 | |
| Download: ML19221A252 (9) | |
Text
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- AP 1001 Three Mile Idand Nuclear Station SIDE 1
[ gure 1001-8 Special Operating Procedure SOP No. d-U E&3 (F r c m s O P Log f a c.. )
(
NOTE:
lastructions.nd guld.68n.e in AP 1001 mo.t b. f o io..d wh a co r. pieting Unit No.
iru. f osm.
Date N / <, [ O C4 h
1.
Tit l*
AL/len-v
&^~
u i
, th - n !A w
2.
Purposa onciuo. po,po.. or sc e:
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e
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D 3.
Attach procedure to this for written according to\\ 2 following format.
A.
Limitations and Prece ions 1.
Nuciear..
2.
Environmental Safetv 3.
Per: nael S ' y 4.
Eqt.ipmat Protec ic -
B.
Prerequisites C.
Procedure Generated by EdN*c Date V k
D eration of SD P - sn.n d. no ioes.r in.n so c.v. erom in..n.cti a.i/ov in. sc P or (.) or cui e.io- - -nien. < occur. fir.i.
(a)
SDP will be cancelled by incorporatibn into existing / ojr /new permanent
/
i procedure subr.iitted by
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/
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I-(b) SOP is not valid af ter
/
tem m circommAc onica om r..oi, in so e u.4ng c nc..i.a >
6.
(a) is the procedure Nucimr Safety Re!ated?
If "yes", complete Nuclear Saf ety Evaluation. (sie. 2 o,i.v rormi Yes O No (b) Does the procedure aff ect Environmental Protection?
i (sio. 2 opni. rorm)...
..y<.;....
Yes O No O If "yes", complete Environmental Evaluation.
(c) Doc 4 the procedure affect radiation exposure to person ei?..
l YesO NoO y.....
in. Sb.
Su per vi.or. 'I f.n y no tion.
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7.
Review and Aocroval
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^
- Approved - Shif t Supervisor e[l' s
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R ALAD b de'ed - List members of PORC con ac ed Nk $4&M Q
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'q Approved - Unit Superintendent
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N. SOP is Cancelled a
S.j '* #5 p
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-mce 79, B & W telex, " Pressure Reduction," dated April 4,
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b.
Pressure reduction procedure log Y
c.
Procecure reference A 5.
1.imits and Precautions a.
Pressure reductions should be conducted in a slow, controlled manner.
Attempt to maintain a 5 psi / min rate.
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y~~..7 b.
Nominal pressure reductions should net-eme. f-K psi imemeMsv-P '
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W c-.rt c'ec/ To ni io mph fiticf4McDi i i
Minimum pressure for RCP operation is shown on attachment (a).
Operation c.
below the unrestricted pump curve and above the 3% head loss curve should be kept to a minimum.
Total operation at,these conditions shall not exceed -
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C While adjusting DNssure downward, spray flow pressure r x;u'-ticn must be e.
contunously monitored to prevent an underpressure condition.
- f. Terminate plant pressure reduction by this procedure if pressurizer level drops belcw-/J5 inches.
A0 9
Terminate plant pressure reduction by this procedure if/' normal pressurizer level indication is lost or beccmes erratic.
Folicwing evaluation, this procedure can be resumed, h.
Any unusual changes in pressarizer level shculd be evaluated to
/
determine if a bubble has reformed.
/
i.
If noise monitoring indicates the presence of a bubble at any stpg atop and evaluate before going to the next pressure increment.
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If a bubble is indica ted, calculate the ~ size.of the bubble ~M@m:.-f-. mg^
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Prerecuisites
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a.
Confirm RCP 1A is lined up and available to start. This does not require N.
starting RCP 1A.Codsu W odohMj'D.h ou ELE 6k GiE#ttr, 7
()
u b.
All available heaters on and in manual at maximum heat rate.
~_.
c.
Spray valve in manual.
Spray ficw adjusted to maximize degasification rate for the available heat input by the pressurizer heaters.
d.
Pressurizer level about 225 inches._t oc m kn
(
v RCS pressure stable at preselected valite (approx. 950 psig.)
e.
f.
Normal pressurizer level indication is available in the control rocm.
g.
MRC approval must be obtained prior to cc=mencing pressure reduction and prior to beginning each, pressure reduction ir-cr- ;nt.
so p~/
7.
Procedure g.
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f.' Upon completion of each 50 i pressure reduction, obtain a report frcm the sound and vibration monitoring team and perform a bubble check.
Subble check consists of opening the pressurizer vent valve (RC-V137) while at the upper end of the current increment pressure band to allow a pressure drop of
/C%
50 75 psig, then shuttino RC-V127.
If pressurizer level does not incre359 then no bubble exists.
existing pressure should continue until this test indicates no bubble.If pr the U
noise monitoring indicates the presence of a bubble, maintain this pressure until noise analysis indicates bubbles are no longer present.
Allow incore thermocouple readings to stabilize prior to proceeding to the next pressure increment.
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