ML20155H596
| ML20155H596 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco, 05000000 |
| Issue date: | 06/06/1985 |
| From: | SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | |
| Shared Package | |
| ML20155H523 | List: |
| References | |
| RTR-NUREG-1195 PROC-850606, NUDOCS 8605160294 | |
| Download: ML20155H596 (3) | |
Text
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06-06-85 1
Original l
WP0016F D-0058P
+
RULE 2 - HPI FLOW CONTROL l
I 1.
GUIDELINES FOR TERMINATING HPI
)
.1 HPI operation may be terminated if the LPI system has been started
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and has been flowing at a rate in excess of 1,000 gpm in each injection line for 20 minutes.
)
.2 HPI may be terminated any time the RC subcooling margin is restored AND pressurizer level is above 100 inches and increasing.
Normal makeup should be started.
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Exceotion - If core c'ooling is provided by HPI cooling.
(
i 2.
GUIDELINES FOR THROTTLING HPI
.1 The flowrate of each HPI pump should not be throttled below 105 gpm with HPI miniflow valves SFV-23645 and SFV-23646 closed.
.2 HPI should be throttled to prevent exceeding the reactor vessel pressure temperature limit of Figure 1 during OTSG cooling or HPI g
cooling.
A 1
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.3 HPI pump flow should be throttled to prevent the pump flow from exceeding 525 gpm.
.4 HPI can be throttled anytime the reactor subcooling margin is restored.
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1
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FIGURE
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.1 Reactor Coolant System Interim Fracture Limit No forced Flow and ThermalShociOperatingRegion
.e.:
t t
0 i
h s
J t
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I i
l i
l O
e 1
k y
1 A
W j
l
,i.r.-
- =
- y v
~. _. - -
y
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r FIGURE 1 REACTOR COOLANT SYSTEM INTERIM FRACTURE LIMIT 1
NO FORCED. FLOW AND THERMAL SHOCX OPERATING REGION i
\\
.c 3200 5 NOTE:. Maintaining the reactor i
E coolant subcooled takes 3000
- = precedence over the Interim E
NO FORCED FLOW Brittle Fracture Curie OPERATING BAND 1
2501 page 6) 2800
[
QHPI _
j 5INTERIMBRITT1.EFRACTUR>
n 2600 E
CURVE BREfK~ POINTS VARIABLE :
3
,I
=
_ SU0C00 LED :
(
ETEMPERATURE PRESSURE INTERIM BRITTLE t
i E
FRACTURE CURVE -'
U l
2400 j
E 303 250 E
500 1500
)
I w 2200 -
_e l,
B,
!O E 2000 _
RESTRICTED
=
l
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REGION.
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1-=
x y 1800 -
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m
'u T. 5. CURVE 3.1.2-2
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j E 1600 - - -
NOT LIMIT x
y g
" 1400 -
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W E'
c THERMAL SHOCM
. ~ ~
i 1200 -_
O M A G G REGION if
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a a
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j INCORE TC',5 TO MONITOR f'
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1000
--SATURATTON i I
.. ' -u -
l
}; PREFERRED ALTERNATE.
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CURVE i
2
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=-
jl)79254 T9256 -
. -~
.r 800
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t 2
3 ) T9258 T9260
.e -'~
E3) T9263 T9252
- _~
. ~ -.
c'
-~
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600 -!4) T9272 79266
~ 3-f j
iS.).79286 T9270
~ ~,. - _.. ~~_ _. -
RESTRICTED REGION EE
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400 -
~~
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- i-
- _=
f.'
',,f
-7 f~
On 0
1do 260 360 400 560 660
-80 INDICATED RC TEMPERATURE
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~3-END -
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i 04-12-85 Original f%
- WP0010F s.-
0-0058P CP.102 NORMAL C00LOOWN j
1.0 START RCPs.
.1 E any RCPs are running, M go to Step 2.0, otherwise continue.
.2 E natural circulation is in progress, M start RCPs per OP A.2, RCP.
One operating RCP per loop is desired.
2.0 E TWO OTSGs ARE IN SERVICE, M TO GO OP 8.4. SECTION 5.0, OTHERWISE CONTINUE.
.1 E RCPs ARE NOT AVAILABLE GO TO OP 8.4 SECTION 6.0.
3.0 PREPARE FOR COOLDOWN WITH A ORY OTSG.
I
.1 Calculate the existing tube to shell AT for the dry OTSG.
f AT. Sum OTSG Shell NC - Tcold number of T/Cs AT =
F.
This value must not exceed + 100*F.
OR Computer point G-613 (A OTSG) and G-614 (8 OTSG).
.2 When the A T, 'as determined in Step 3.1 above, is <100*F, open the
-bypass valves in the. operable.OTSG and commence cooldown.
00 NOT axceed y
100*F tube to shell AT on the dry OTSG.
.3 If' reactor coolant flow is by natural circulation, use the auxiliary spray from the HPI system if spray water to pzr AT 1410*F or the EMOV to depressurize the RCS.
4.0 E A SMALL 8REAK LOCA HAS OCCURRED, THEN GO TO CP.103, STEP 11.'O, OTHERWISE CONTINUE.
5.0 GO TO OP 8.4 SECTION 5.0, OR 8.4 SECTION 6 IF ON NATURAL CIRCULATION.
ENO h
CP.102-1 n.
,-v,.,.-....,n
...m
_ _m m..-~~m.
,m...~.,--
/33o.5/2.
04-12-85 Original 8,*
WP0010F jV 0-0058P i
CP.102 NORMAL COOLDOWN i
1.0 START RCPs.
.1 E any RCPs are running,,TH.fd go to Step 2.0, otherwise continue.
.2 E nitural circulation is in progress, M start RCPs per OP A.2, RCP.
One operating RCP per loop is desired.
a]
2.0 E TWO OTSGs ARE IN SERVICE. THEN TO GO OP 8.4, SECTION 5.0, OTHERWISE 1
CONTINUE.
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.]
.1 E RCPs ARE NOT AVAILABLE GO TO OP 8.4 SECTION 6.0.
-]
4 j
3.0 PREPARE FOR COOLDOWN WITH A ORY OTSG.
- i
.1 Calculate the existing tube to shell AT for the dry OTSG.
i eahd f
AT = Sum OTSG Shell T/C
-T number of T/Cs AT =
F.
This value must not exceed' + 100*F.
.i QR Computer point G-613 (A OTSG) and G-614 (8 OTSG).
.2 When the & T, as determined in Step 3.1 above, is <100*F, open the
~
bypass valves in the operable OTSG and conmence cooldown. 00 NOT exceed 100"F tube to shell AT on the dry OTSG.,
.3 If reactor coolant flow is by natural circulation, use the auxiliary spray from the HPI system if spray water to pzr AT 1410*F or the EMOV t
_ to depressurize the RCS.
4'.0 E A SMALL 8REAK LOCA HAS OCCURRED, EFJ GO TO CP.103, STEP 11.0, j
OTHERWISE CONTINUE.
5.0 GO TO OP 8.4, SECTION 5.0, OR 8.4 SECTION 6 IF ON NATURAL CIRCULATION.
.i ENO h
CP.102-1 9
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