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,' RPV Level /Rx Pow 2r E0P 575 Page 1 Rev. 2 ,
(j Unit 1 RPV i.evel/Rx Power Control Emergency Procedure PAGE NO. EFF. REV.
18 2 2a,33,4a 2 E.LS OSJECTTYt5 Enter free top s70 'RPY Level Centrol" or top 575 'RPY Level Resteretten" or E0P s78 'RPY Fleeding" 1P Lower RPV Water Level geduce heat input to suppression peo) gr Maintain RPY Water Level Await completion of boren inje'c tion
~ d O nmen 270 lbs. Soron Injected,Besters RPY Water tevel Min beron I
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d l Proceed to Cold Shutdown Return to normal procedures
References:
- 1) Emergency Procedure Guidelines, Millstone Unit One
- 2) Emergency Procedure Guidelines, Appendix B
- 3) Emergency Procedure Guidelines, Appendix C
- 4) ACP-QA-3.02, Attachment A
- 5) Millstone Nuclear Power Station Unit No. 1 Technical Specification
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AfV Level /Rs Power ECP $75 Page la ,,
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- 4. d4 #ower control (EOP 572)
- 1. If the Rn is not shut down and $wppression Pool Temperatsre reachen 110'F.
- 8. C7 304 Standby Liould Control System 4
- 1. (Step 4.2.1) If, at any time, it becomes apparent tPere has been a gross f ailure of control rods such that they l' cannet be scramed, or moved under normal hydraulic pressure.
- 2. (Step 4.2.2) Nors41 rod esercise indicates rods stuck and not able to scram such that it is apparent. Shutdown wargin Requirements of Technical Specifications es6not to 90 %.
O (OP 571 RPV level /R.s Power O
RPV Level /Rx Power E0P 575 Page 2 !
-' Rev.
- 1. . PURPOSE The purpose of this procedure is to minimize heatup of the j suppression pool during.the time of boron injection whi'e '
maintaining RPV water level in a satisfactory range (-li?" te l
+ 50"). i
- 2. ENTRY CONDITIONS 2.1 This procedure is to be entered from E0P 570 "RPV Level '
Control" or E0P 576 "RPV Level Restoration", if Boron injection is required as per E0P 572 step 3.5 or E0P 578 "RPV Flooding" if RPV water level can be determined and flooding is ,
- j. not required. !
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. e RPY Level /Rx Power E0P 575 Page 3a Rev. 2
. I. CONDITIONS RE0V! RING UV FLOODING A. RPV Level Control (EOP 570)
- 1. RPY water level cannot be determined.
- 8. Containment Control (EOP 580)
- 1. Drynell temperaturn reaches the RPV Saturation Temperature.
- 2. Suppression Chamber pressure cannot be maintained below the Prisary containment Design Pressure.
C. PPV Level Restoration (E0r "$)
- 1. RPY water level cannot be scarmined.
D. RPY Level /Rx Power (EOP 575)
- 1. RPV water level cannot be determined, and Rx Power cannot be deterstned or maintained above 8%.
!!. CON 0!TIONS RIW! RING EM(RC2NCY RPV OEPRES$URIZATICM A. Containment Control (EOP $80) ,
- 1. If Suppression Pool temperature and RPV pressure cannot be restored and maintained below the Heat Capacity Temperature lielt.
- 2. If Drywell temperature cannot be saintained below 281'F. [
- 3. If Drywell pressure exceed: 15 psig. I 4 If Suppression Pool water level cantv;t be saintained abo %
.,, the Heat Capacity Level Lielt.
- 5. If Suroression Pool water level and RPV pressure cane.ot be restored and saintained below the Suppression Pool Load Limit.
- 1. If RPY water level is < -127* and rising, RPY p' essure >
330 psig, antt Condensate /Feedwater to not avallaele.
- 3. If RPV water level is lowering, RPV pressure > 330 vsig, and at lest two normal injection subsystems are lit,el up for injection with pumps running.
- 4. If RPV water level is Icnering and approaches *127". tPV pressure > 330 psig, and any system or normal injectia subsystes, sr alternate injection subsystes is lined-up with at least one pump ruc.ning.
C. RPV Level /Rx Power (EOP 575)
- 2. Af ter 270 pounds of Baron have been injected or all , !
control rods are inserted beyond position 04, if RPV water 7' level cannot be sa!ntale.ed above 127' (TAF).
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l RPV Level /Rx Powar E0P 575 Page 3 Rev. 2 ,
- b) l 3. OPERATOR ACTIONS While executing the following steps,
- IF RPV Flooding is required. OR U V water level cannot be detU mined, 3 THEN control injection into the'RPV to maintain Rx Power above M ut as low as practical.
IF RPV Flooding is required OR RPV water level ecnnot be Betermined, 3 E Rx Power cannot be determined or maintained greater than 8%,
. THEN GO TO E0P 578 "RPV Flooding"
- AAAAAAARRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAR**AAAAAAAAAAAAA CAUTION Large Rx Power oscillations may be observed while executing this step.
AAAA22AAAAAAAAAAAAAAAAAA2**AAAAAAAAAAAAAAA22AAAAAAA**AAAAAAAAAAAAAAAARAAAA 3.1 IF,:
Reactor Power is greater than 3% OR cannot be determined AND Suppression Pool Temperature is greater than 110*F AND Either an SRV is open or opens 0R Orywell Pressure is greater than 2.0 psig.
THEN Lower RFV Water Level by terminating and preventing all Injection into the RPV EXCEPT from Boron Injection and CR0 UNTIl.
, 3.1.1 Rx Power drops to less than 3%, OR i
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! 3.1.2 RPV water level reaches -127" (TAF), OR l 3.1.3 All SRVs remain shut and Drywell pressure remains below 2.0 psig.
O E0P 575 RPV Level /Rx vower
RPV Level /Rx Power E0P 575 Page 44 Rev. 2 -
- 1. If Suppression Pool temperature and RPV pressure cannot be restored and maintained below the Heat Capacity Temperature limit. '
- 2. If Drywell temperature cannot be maintained below 281'F.
- 3. If Drywell Pressure exceeds 15 psig.
- 4 If Suppression Pool water level cannot be maintained above the Heat Capacity Level Limit.
- 5. If Suppression Pool water level and RPY pressure cannot be restored and maintained below the Suppression pool Load Limit.
330 psig, and Condensate /Feedwater is not available.
- 2. If RPY water level is rising, and RPV pressure < 350 psig and rising.
- 3. If RPV water level is lowering, RPV pressure > 330 psig, and at least two normal injection subsyste.,a are lined-up for injection with pumps running.
- 4. If RPV water level is lowering and approaches -127", RPV pressere > 330 psig, and any systee, or normal injection subsystem, or alternate injection subsystev is lined-up with at least one pump running.
C. RPY Level /Rx Power (EOP 5'i)
- 2. After 270 pounds of Baron have been injected or all .
control rods are inserted beyond position 04, if RPV water Icvel cannot be saintained above -127" (TAF).
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f RPV Level /Rx Power E0P 575 Page 4 Rev. 2
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khile executing the following staps, E Emergency RPV Depressurization is required THEN continue this procedur6 at step 3.4 E:
Rx Power is greater than 3% OR cannot be determined AND RPV Water Level is above - 127" (TAF) AND Suppression Pool Temperature is above 110*F AND t
Either an SRV is open or opens OR Orywel's Pressure is greater than 2.0 psig.
THEN return to Step 3.1.
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA22222*AAAAAAAAAAAAAAAAAAAAAAAAAAA2222222A CAUTION Oo not secure or place an ICCS in MANUAL mode unless, by at least .
two independent indications, (1) c' uperaun in AUTOMATIC. mode is confirmed, or (2) adequate core cooling is a> 9ted. If an EC'S is placed in MANUAL mode, it will not initiate autw Wal'" na e frequent checks of the initiating or controlling paraneter. k,.en manual operation is no longer required, restore the system to AUTOMATIC / STANDBY mode if possible.
CAUTION If a high drywell pressure ECCS initiation signal 2.0 psig (drywell pressure which initiates ECCS) occurs or exists while depressurizing, prevent injection from those S and LPCI pumps not ,
required to assure adequate core cooling prior to reaching their maximum injection pressures. When the high drywell 1ressure ECCS j Jnitiation signal clears, restore CS and LPCI to AUTOMATIC /
STANDBY mode.
CAUTION A rapid increase in injection into the RPV may induce a large power excursion and result in substantial core damage.
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E0P 575 kPV Level /Rx Power
i RPV Lovel/Rx Power E0P 575 Page 5
,- Rev. 2 ;
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3.2 Maintain RPV water level using the cond/'eedwater, CRD, and LPCI systems at the level depending on: -
1 3.2.1 IF RPV water level was deliberately lowered for >
power control in step 3.1, maintain RPV water level to which it was lowered, OR 3.2.2 IF RPV water level was not deliberately lowered for power control in step 3.1, maintain RPV water level between +10" and +50".
- 3. 3 IF RPV water level cannot be maintained per step 3.2 (above),
IEaintain RPV water levei greater than -127" (TAF).
AAAAAAAAAAA4AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA CAUTION A rapid 'ncrease in injection into the RPV may induce a large power excursio1 and result in substantial core damage.
- AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
- 3. 4 E RPV water level cannot be maintained greater than -127" THEN, GO TO E0P 577 "Emergency RPV Oepressurization" and .
rapidly depressurize the RPV concurrently with the following steps:
3.4.1 Terminate and prevent all injection into the RPV except from Boron injection systems and CRD.
NOTE Consideration should be given to removing the CS and LPCI pumps' breakers' control power fuses, located in each breaker cubicle, to prevent inadvertant starting of the LPCI and CS pumps.
!O iOP 95 iPV . ave t. Rx 2%.e r
RPV (.evel/Rx Power E0P 575 Page 6 ;
Rev. 2.
3.4.2 WHEN RPV pressure.is below the Minimum Alternate RPV Flooding Pressure:
NUMBER OF OPEN SRVs MINIMUM ALTERNATE RPV FLOODING PRESSURE (psia) 6 95 5 118 4 150 3 205
. 2 320 1 640 i
THEN commence and slowl raise injection flow into the RPV with the fo ow ng systems to restore and maintain RPV water level greater than -127" (TAF):
3.4.2.1 Condensate /Feedwater L
3.4.2.2 CR0 3.4.2.3 LPCI r
3.4.2.3.1 Replace the LPCI pumps breakers' ;
control power fuses if removed, f NOTE If a LPCI System initiation signal is present, the LPCI pumps will start when the Breaker ;
Control Power fuses are installed.
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l RPV Level /Rx Powar E0P 575 page 7
.' Rev. 2 V ;
3.4.3 IF RPV water level cannot be restored *and maintained Hove -127" (TAF),
l THEN comme 1ce and slowly raise injection flow into the RPV with the following systems to restore and maintain RPV level above -127" (TAF)- 1 3.4.3.1 Core Spray 3.4.3.1.1 Replace the core spray pumps's breakers' control power fuses if removed.
NOTE If a core spray system initiation signal is present, ;
the core spray pumps will start when the breaker control power fuses are installed.
. 3.4.3.2 ECCS Keep-full systems 3.4.3.3 Fire System (OP 332A) 3.4.3.4 ESW'(X-Tie) (OP 335)
IF while executing step 3.5, Rx Power commeness and continues to FTse, ,
4 THEN return to step 3.1.
3.5 WHEN 270 poui.ds of Boron have been injected (SLC Storage Tank g,j OR TTHXL all control LEVEL rods are < 37% CRP 905), Tbeyond position .04 inserte THEN restore and maintain RPV water level between +10" and ,
UP. ,
3.5.1 IF RPV water level cannot be restored and maintained Eove +10" THEN maintain RPV water level greater than -127"
'(TXE).
3.5.2 IF RPV water level cannot be maintained greater than :
927" (TAF), '
THEN GO To step 3.4 of this procr. dure.
O E0P $75 iPV '.avel/Rx 6ser
e RPV Level /Rx Power E0P 575 Page 8
', Rev. 2
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!s_) IF RPV cooldown is required but cannot be established, AND all control rods are inserted beyond position 04 THEN perform Alternate Shutdown Cooling as per-EOP 579.
- 3. 6 WHEN OP 206 "Plant Cooldown to Cold Shetdown" has been entered f rom E0P 571 "RPV Pressure Control Step 3.7.
THEN go to OP 206 "Plant Cooldown to Cold Shutdown".
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I STATION PROCEDURE COVER SHEET A. IDENTIFICATION '
Number: E0P 575 Rev. 2
Title:
RPV LEVEL /Rx POWER CONTROL EMERGENCY PROCEDURE Prepared By: R. KRAEMER B. REVIEW I have reviewed the above procedure and have found'it to be satisfa.: tory.
TITLE SIGNATURE DATE DEPARTMENT HEAD k d. ,
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--- / f J C. SPECIFIC UNREVIEWED SAFETY QUESTION EVALUATION REQUIRED:
Modifies intent of procedure and changes operation of systens as described in design documents. YES'[ ] NO ((
(If yes, perform written USQ determination and Safety Evalustion, and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)
ENVIRONMENTAL REVIEW REQUIRED (Adverse environmental impact) YC.S ( ) NO [i
- 0. SPECIFIC SAFETY EVALUATION REQUIRED ffects response of safety systems, performance of systems which may have been credited in the safety analysis or non-credited systems which may indirectly affect safety system response. YES [ < NO [ ]
(If yes, perform written Safety Evaluation and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)
E. INTEGRATED SAFETY EVALUATION REQUIRED YES [T NO [ ]
F. PROCEDURE REQUIRES PORC/SORC REVIEW (In addition to review, ittms with a YES response must be docur.ented in the PORC/SORC meeting minutes.) YES [ g NO ( ),
G. P0 50RC APPROVAL SORC Meeting Number / P T H. APPROVAL AND IMPLEMENTATION The attached procedure is hareby approved, an't ef fective on the date be16w:
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