ML20209F816
| ML20209F816 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 04/24/1987 |
| From: | Stern S Office of Nuclear Reactor Regulation |
| To: | GULF STATES UTILITIES CO. |
| References | |
| NUDOCS 8704300392 | |
| Download: ML20209F816 (3) | |
Text
1 April 24, 1987 Dock'et No. 50-458 Mr. James C. Deddins Senior Vice President, (RBNG)
Gulf States Utilities P. O. Box 220 St. Francisville, LA 70775
-- ATTN: Nuclear Licensing
Dear Mr. Deddins:
SUBJECT:
-COMPARIS0N OF RIVER BEND AND NINE MILE POINT UNIT 2 WYE PATTERN GLOBE VALVE I am forwarding for your information and use a report prepared for Nine Mile Point Unit 2.
This report compares the electrical design of their wye pattern globe valve with those at Hanford and River Bend.
Please contact me for any further information on this matter.
Sincerely, Is)
Stephen M. Stern, Project Manager ProjectDirectorate-IV Division of Reactor Projects - III, IV, V and Special Projects
Enclosure:
DISTRIBUTION
,UEEER"TTTO NRC PDR As stated i
Local'PDR "~~
PD4 Reading cc w/ enclosure:
D. Crutchfield F. Miraglia See next page F. Schroeder 0GC E. Jordan B. Grimes J. Partlow S. Stern P. Noonan ACRS (10) i PD Plant file JCalvo M. Haughey w/o enclosure
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8704300392 870424 DR ADOCK 05000458 PDR
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UNITED STATES NUCLEAR REGULATORY COMMISSION a
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WASHINGTON. D. C. 20565
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April 24, 1987 o,
Docket No. 50-458 Mr. James C. Deddins Senior Vice President, (RBNG)
Gulf States Utilities P. O. Box 220 St. Francisville LA 70775 ATTN:
NuclearLIcensing
Dear Mr. Deddins:
SUBJECT:
COMPARISON OF RIVER BEND AND NINE MILE POINT UNIT 2 WYE PATTERN GLOBE VALVE I am forwarding for your information and use a report prepared for Nine Mile Point Unit 2.
This report compares the electrical design of their wye pattern globe valve with those at Hanford and River Bend.
Please contact me for any further information on this matter.
Since ly l
/
I )u 6
Steph n M.
tern,ProjectManager ProjectDirectorate-IV DivisionofReactorProjects-III, IV, V and Special Projects
Enclosure:
As stated cc w/ enclosure:
See next page 1
Mr. James C. Deddens Gulf States Utilities Company River Bend Nuclear Plant cc:
Troy B. Conner, Jr., Esq.
Mr. J. E. Booker Conner and Wetterhahn Manager-River Bend Oversight 1747 Pennsylvania Avenue, NW P. O. Box 2951 Washington, D.C.
20006 Beaumont, TX 77704 Mr. Edward Grant Director - Nuclear Licensing Mr. William H. Spell, Administrator Gulf States Utilities Company Nuclear Energy Division P. O. Box 2951 Office of Environmental Affairs Beaumont, Texas 77704 P. O. Box 14690 Richard M. Troy, Jr., Esq.,"'
Assistant Attorney General in Charge Mr. J. David McNeill, III State of Louisiana Department of Justice William G. Davis, Esq.
234 Loyola Avenue Department of Justice New Orleans, Louisigna 70112 Attorney General's Office 7434 Perkins Road Resident Inspector Baton Rouge, Louisiana 70808 P. O. Box 1051 St. Francisville, Louisiana 70775 H. Anne Plettinger 3456 Villa Rose Drive Gretchen R. Rothschild Baton Rouge, Louisiana 70806 Louisianians for Safe Energy, Inc.
1659 Glenmore Avenue l
Baton Rouge, Louisiana 70775 President of West Feliciana l
Police Jury Regional Administrator, Region IV P. O. Box 1921 U.S. Nuclear Regulatory Comission St. Francisville, Louisiana 70775 Office of Executive Director for Operations Mr. Frank J. Uddo 611 Ryan Plaza Drive. Suite 1000
- Uddo & Porter Arlington, Texas 76011 6305 Elysian Fields Avenue Suite 400 Philip G. Harris New Orleans, Lcuisiana 70122 Cajun Electric Power Coop. Inc.
10719 Airline Highway P. O. Box 15540 Baton Rouge, LA 70895
6 E Sn 9
NI AGARA MOHAWK POWER CORPORATION 301 PLAINFIELD ROAD, SYRACUSE. N Y 13212rTELEPHONE (3 f 5) 4741511 April 7,1987 (NMP2L 1019)
U.S. Nuclear Regulatory Commission Attn:
Document Control Desk Washington, D.C. 20555 Re:
Nine Mlle Point Unit 2 Docket No. 50-410 Gentlemen:
Enclosed for your use and information is a report that compares the electrical design of the Nine Mlle Point Unit 2 wye pattern globe valve presently being installed with the ball valve design. The report also compares the wye pattern globe valve electrical design for Unit 2 with the Hanford 2 and River Bend electrical design.
This information was discussed with the Nuclear Regulatory Commission staff on April 2, 1987, and is provided to support review of the wye pattern globe valve design.
For your information, there is no restriction on copying any of the drawings included in this submittal.
If there are questions, please contact Mr. Zallnick of my staff.
Very truly yours, NIAGARA MOHAWK POWER CORPORATION WyOM C. V. Mang&15 Senior Vice Presicient NLR/pns 2976G Enclosure U
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Regional Administrator, Region I
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Ms. E. G. Adensam, Project Director Mr. W. A. Cook, Resident Inspector
,k I
Project File (2)
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-e704130437 --870407 PDR ADOCK 05000397 P
UNITED STATES OF AMERICA NUCLEAR REGULATORY ColellSSION In the Matter of
]
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Niagara Mohawk Power Corporation
]
Occket No. 50-410 3
(Nine Mlle Point Unit 2)
)
AFFIDAVIT C. V. Mancan
, being duly swcrn, states th'at he is Senior Vice President of Niagari Mohawk Power Corporation; that he is authori:ed on the part of said Corporation to sign and file with the Nuclear Regulatory Commission the documents attached hereto; and that all such documents are true and correct to the best of his knowledge, information and belief.
&.M nAh AA Subscribed anc' sworn to before me, a Notary Public in and for the State of New York and County of
&nENL(L40 -
, thls 7^
day u
of 04d 1987.
IDtty A61 LAC Notary Publ1c in and for bN'#^f County, New York My Consission expires:
f ' A*:Y FR*TCOH1
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. n{19 w,.vr. e -- tm 's t : e e * * * *
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'I NINE MILE POINT UNIT 2 DOCKET NO. 50-410 COMPARISON OF ELECTRICAL DESIGN OF THE HYE PATTERN GLOBE VALVE ACTUATOR WITH THE BALL VALVE, HANFORD 2 and RIVER BEND DESIGN i
l
-8704150450 870407 i
TABLE OF CONTENTS PAGE TITLE 1
I.
SUMMARY
II.
ELECTRICAL AND ACTUATOR COMPARISON 2
0F WYE-PATTERN AND BALL VALVE DESIGN III.
ELECTRICAL COMPARISON OF NMP2 6
AND RIVER BEND IV.
ELECTRICAL COMPARISON OF NMP2 8
AND HANFORD (HPPSS UNIT #2) 11 V.
ATTACHMENTS
- a. One Line Diagram EE-H010-6
- b. Pneumatic Control Circuits Schematic
- c. Proposed Electrical Elementary Diagrams
- d. Simplified MSIV Power Supply One Line Diagram J
O 2976G
-n..~
I.'
SUMMARY
+
This report provides a description of the Nine Mile Point Unit 2 electrical portions of the Wye-Pattern Main Steam Isolation Valves I
(MSIVs).
The electrical design of the system is essentially the standard General Electric design.
The Protection System philosophy is j
unchanged.
l Section II provides a comparison of the Wye-Pattern valves and the ball valves, while Section III provides a comparison of NMP2 and River Bend, and Section IV contains a comparison of NMP2 and Hanford (WPPSS Unit
- 2).Section V includes diagrams and a schematic to assist in the review of the proposed changes.
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2976G i..
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II.
ELECTRICAL AND ACTUATOR COMPARISON OF WYE-PATTERN & BALL VALVE DESIGN 1.
Initiation Signals and Power Supplies a.
The Protection System signals that provide the trips for the Hye-Pattern MSIVs are the same signals utilized in the ball valve design.
The power supplies are the same non-Class IE 120VAC supplied by UPS3A (Trip System A) and UPS3B (Trip System B).
The design uttilzes the same electrical protection assemblies (EPA), distribution panels and the same cables.
The fall safe de-energize to operate logic function, used for the ball valves, remains with the Hye-Pattern valves.
b.
There has been no change in the routing of the field cables. Physical separation of the four channels of power supply remains the same. However, for the Hye-Pattern MSIV, the channel separation is maintained up to the junction box adjacent to the MSIV where the field cables end.
This was addressed in the proposed changes to the Unit 2 FSAR Section 8.3.1 submitted on March 11, 1987.
c.
Attached for your information are selected General Electric elemer.tary wiring diagrams of the trip logic and a Stone and Webster One Line Diagram of the power distribution system.
2.
Controls and Loalc Each Hye-Pattern MSIV contains two electrically operated a.
solenoid valves, a three way pilot solenoid valve with two coils and a test solenoid valve.
The two pilot solenoid coils on a MSIV is fed from a different tr)p system.
Since the two (2) trip pliot solenoid coils are supplied power from two (2) different trip systems and both trip systems must de-energize to operate, a transfer and isolation scheme is not required on the Hye-Pattern valves. This change and the standard General Electric control scheme have reduced the number of field cables.
See expanded description in Section IV, comparison of NMP2 and Hanford.
The original ball valve design had 5 solenoids (2-trip solenoids, 2-latch solenoid valves, 1-test solenold) and pump motors for each MSIV as electrical load. Two trip solenoids and 2-latch solenoid valves were fed from two different channels of power supply (Class IE). The test solenoid was fed from 120V Class IE bus; the pump motor was fed from 600V non-Class IE bus. The hydraulic MSIV ball valve equipment is being deleted along with the local relay control panel.
' 2976G
l b.
Each Wye-Pattern inboard and outboard MSIV is controlled by a three position maintained selector switch (close-auto-test) and a pushbutton switch for testing each valve. These switches are located on the operating benchboard in the PGCC similar to the ball valve design.
The following table provides a descriptive comparison of the HSIV operation:
Wye-Pattern Modified Ball Opening Opening the HSIV is Opening the MSIV is accomplished accomplished by energizing by energizing both solenold either pilot solenold coil valves, and forcing the valve A or B on the 3 way solenoid open using hydraulic fluid.
valve.
This directs air to Solenoid valves remain closed the 4 way control valve as long as MSIV is open.
which directs the air to Hydraulic pressure is maintained the cylinder piston to open by hydraulic pump and Jockey the MSIV.
pump.
a) One 3 way solenoid valve a) Both solenoid valves needed with dual coils (A & B) is to open MSIV. Solenoid needed to open an MSIV.
valves are connected in Only one pilot solenold coil parallel.
is energized to open the HSIV.
b) One out of two taken twice b) Same NS4 trip inputs shall not be present to open MSIV (A or C + B or D)
Closing Closing the MSIV is accom-Closing the MSIV is accomplished plished by de-energized both by de-energized any solenold coils A & B of the pilot valve A or B, thus bleeding solenoid valve.
fluid from the piston and closing the MSIV.
a) Both coils of solenoid a) One solenold valve de-valve must be de-energize energization causes MSIV to close MSIV.
to close.
b) One out of two taken twice b) Same NS4 inputs close MSIV.
(A or C + B or D) c) A single power failure of c) A single power failure will either UPS3A or UPS3B close the MSIV.
will not close the MSIV.
2976G. _.
Testing Testing of the MSIV is accom-Testing of MSIV is acccmplished plished by energizing sole-by de-energizing testing sole-nold "C" (test solenold) on the noid valve, which will initial?
second 3 way solenoid valve, slow closing of MSIV by bleedtog This solenoid valve directs fluid. When MSIV is 90% open,the control air to the pilot air test circuit is automatically operated control valve and disconnected.
Thus solenoid shifts it to allow the air valve will energize and MSIV cylinder piston to exhaust will open again. Test com-at a controlled rate through pleted Indication light will an adjustable orifice, light when valve 90% open.
Both green / red lights of Also both green / red lights of MSIV will light, thus MSIV will light, thus indicating indicating valve is in the valve is in intermediate intermediate oosition.
position.
a) Test solenoid is normally a) Test solenoid normally ener-de-energized.
Energize to gized, de-energize to perform perform test.
test.
b) Test solenoid is Class IE b) Test solenoid is non-Class IE c) Operator action required to c) MSIV return to full return MSIV to full open open position of the test position of the test. Limit automatically. Limit switches are not wired switches wired in test cir-in the test circuit.
cult to automatically dis-connect test circuit.
The trip logic for the Wye-Pattern valves remains the c.
same as the ball valves, one out of two taken twice.
Isolated interlocks between trip system logic have been maintained to meet the requirements of NUREG 0737,Section II.E.4.2, Position 4 (Containment Isolation Dependability) as it pertains to resetting containment isolation valves. The NUREG requirement is still maintained. All logic and controls are located in the control room, d.
With the Wye-Pattern valves, there are some minor hardware changes in the logic, as delineated in (c) above.
The relays used by General Electric are qualified MOR (Potter & Brumfleid) and Agastat.
The ball valve, local J10 Gould relays are not being used and are being removed.
Ball valve reed switches that were used in the control circuits have been deleted from the Wye-Pattern valve circuitry.
3.
MSIV Limit Switch Inputs to the Reactor Trio System The MSIV limit switch inputs to the Reactor Trip System logic remains unchanged from the ball valve design. However, there are two changes associated with the MSIV limit switches.
2976G -,
I a.
The trip setpoint for the ball valves tas 94% open, while the trip setpoint for the Wye-Pattern valves has been changed to 92% open.
This change is reflected in the Technical Specifications.
b.
White status 11ghts have been added to the two (2)
Reactor Trip System vertical panels to assist the operating staff during surveillance testing of the MSIVs.
The white status lights will be extinguished when the MSIV limit switch reaches the trip setpoint during the performance of the test described in paragraph 2.8 above.
4.
Actuators a.
The design change to Wye-Pattern MSIVs necessitated the addition of an air supply system for operation of the Wye-Pattern valves.
The air system includes the use of individual air accumulators of sufficient reserve to close each valve one time.
The ball valve relied on stored spring force alone to close the valve.
The Wye-Pattern valves utilize a pneumatic cylinder to provide the necessary force to compress the MSIV springs.
The hydraulic portion of the actuator consists of hydraulic cylinders and flow control valves. This system is the hydraulic speed control system. There are no electrical controls involved for the hydraulic speed control system.
The ball valves used a hydraulic actuator and opened the valve by hydraulic pressure. Solenoids and hydraulic pumps were used to maintain pressure against the piston to keep the MSIV open.
When the fluid is bled from the piston, the valve closes.
Attached is a pneumatic and hjdraulic control circuit schematic of the Wye-Pattern valves.
b.
The four inboard MSIV pilot valves and MSIV actuator accumulators are supplied with nitrogen gas from the instrument nitrogen system (GSN). The four outboard MSIV pilot valves and MSIV actuator accumulators are supplied from the reactor building instrument air system (IAS).
I 2976G
5.
Monitorina a.
Red and green status lights located on the operating q
benchboard indicates that the valve is open or closed based on input from the MSIV limit switches..
Additionally, white status lights for each MSIV solenoid valve energized are also located on the same benchboard.
These monitoring lights remain the same as the ball valves. Monitoring lights have been deleted for associated ball valve specific controls that have been deleted.
j l
b.
MSIV limit switch inputs to the Emergency Response Facility (ERF) remains unchanged as are the limit swltch inputs to the General Electric transient analysis recording computer (GETARS). Off normal status inputs also remain unchanged with the Wye-Pattern valves.
c.
Process computer and annunciator inputs remain unchanged except for ball valve specific hydraulic controls that have been deleted.
i l
III.
ELECTRICAL COMPARISON OF NMP2 AND RIVER BEND STATION (RBS) 1.
Initiation Slanals and Power Supplies a.
The Protection System signals for NMP2 remain unchanged and are the standard General Electric design.
The initiation signals are essentially the same as RBS.
b.
The electrical power distribution system of NMP2 with Wye-Pattern MSIV is very similar to the power distribution system of RBS Wye-Pattern MSIV.
The RBS M-G sets used to supply power to the MSIVs are non-Class IE, and are normally fed from plant non-Class lE buses.
These are connectible to the emergency buses except during a LOCA. The NMP2 UPS used to supply power to the Wye-Pattern MSIVs are non-Class IE AC and DC buses.
The alternate power supply at the output of the RBS M-G set is from the plant non-Class lE bus through step down and regulating transformers. The alternate power supply at the output of the NMP2 UPS is also from the plant non-Class IE buses through step down and regulating transformers which are connectible to the emergency buses, except during a LOCA.
RBS considers these power sources non essential because the system is of fail-safe design.
NMP2 also considers these power sources non essential because the system is of fall safe design. 2976G
RBS uses two serie: electrical protection assemblies-(EPA) to protect the logic circuits from overvoltage, undervoltage and under frequency conditions. The EPAs are Class IE. NMP2 also uses two series Class IE EPAs, and provides the same protective functions. Both RBS and i
NMP2 designs treat this distribution system beyond EPAs as Class lE. Both designs have used 4 channels.
The cables associated with each channel are uniquely identified in both designs.
In both cases, the channel separation is maintained up to the junction box adjacent to the MSIVs. RBS uses two high integrity, alternating current motor-generator sets as the normal power source for the MSIV power supply. NMP2 uses two uninterruptible power supplies (UPS) as the normal power source for the l
I Hye-Pattern MSIVs.
2.
Controls and 1.ogic The control of the NMP2 MSIV Wye-Pattern valve is similar to the operation of the River Bend MSIV Hye-Pattern valves. Protection System logic for isolation are developed in the same fashion as to cause a trip of the MSIV valves. The manual, auto, and test hardware, operator control functions and monitoring devices located in PGCC are also similar.
In both plants, each MSIV valve is operated by two normally energized solenoids to keep the MSIV valve open under normal plant operation.
Failure of one channel will de-energize only one solenoid keeping the MSIV valve open, failure of two channels of power will de-energize both solenoids closing the MSIV valve. Both plants are also equipped with a MSIV test solenoid valve, which can be manually operated from the control room.
3.
Actuators The NMP2 MSIV is a 26" Rockwell valve while the River Bend MSIV is a 24" Atwood Morill Valve.
A comparison of the NMP2 Hye-Pattern valve and the River Bend Mye-Pattern valve reveals no functional differences.
This is because both valves were designed to meet General Electric's specification requirements for MSIVs (i.e., closure times).
Both valves utilize loaded springs and/or pneumatic pressure to close the valve. A comparison of air systems shows that both plants use an accumulator to supply the air quantity required for pneumatic closure of the valve if the normal air supply is unavailable.
NMP2 and River Bend protect this air reserve with a check valve which isolates each accumulator from a loss of upstream pressure.
NMP2 and River Bend use filters in the air piping to meet General Electric's air quality requirements.
Both plants use stainless steel piping downstream of the air ^
filters to maintain air quality to the MSIVs. 2976G
The air supply systens to the MSIV actuator accumulators on NMP2 is similar to that found on the RBS with the following exceptions.
(IMP 2 supplies 'the four inboard MSIV pilot valves and MSIV actuator accumulators with nitrogen gas from the instrument nitrogen system (GSN).
The four NMP2 outboard MSIV pilot valves and MSIV actuator accumulators are supplied with air from the reactor building instrument system (IAS). On River Bend both inboard and outboard main steam isolation valves and MSIV actuator accumulator are supplied from the instrument air system (IAS).
4.
Monitoring Monitoring for NMP2 was described in detail in Section II.5 above.
NMP2 monitoring devices are essentially the same as RBS with the following exceptions.
NMP2 has MSIV status inputs to the off normal status display, while RBS does not.
NMP2 and RBS both have indicator lights to monitor both MSIV pilot solenoid valves energized.
RBS utilizes ammeters to monitor pilot solenoid valve current, while NMP2 does not utilize this feature.
IV.
ELECTRICAL COMPARISON OF NMP2 AND HANFORD (WPPSS UNIT #2) a.
General Description of Control Logic The NMPh Nuclear Steam Supply Shutoff System (NS4) functions are initiated when sensor signals, monitoring key parameters, exceed setpoints and de-energize relay control circuits, which initiate closure of the isolation valves.
The control circuitry is arranged in dual systems so that a trip must occur in both trip systems to cause a closure of a main steam isolation valve.
J Each trip system contains two independent tripping sensors from each measured variable, only one of which is required to activate a trip system. The trip systems designated A and B are subdivided into logic channels A through D.
MSIV logic channels A and C are in trip system A and logic channels B and D are in trip system B.
4 2976G
For MSIVs, a tripped sensor provides open inputt to a logic function which causes the sensor relay in the associated trip channel to de-energize. The open ccatacts from the de-energized sensor relay are connected in logic functions which cause a trip relay to de-energize. Output from the de-energized trip relays are combined in one-out-of-two-twice logic which generates closure signals for the main steam isolation valves. The Hanford MSIV trip logic functions the same as the NMP2 logic described above.
l
)
Outputs from the main steam isolation valve limit switches are connected into the Reactor Protection System (RPS) circuits for both Hanford and NMP2, which is the standard General Electric design.
b.
MSIV Trio Variables There are seven monitored parameters that make up a trip logic channel for MSIV isolation. A comparison of these for NMP2 and Hanford follows:
NMP2 HANFORD I
Reactor Low-tow Ntr Lvl l
l Instrument make -
Rosemount XHTR & Trip Barten XHTR/Switen Setpoint -
17.8" (-5 to 205 scale)
-50" (-150 to 60 scale (Level 1)
(Level 2)
STM Ln HI Flow Instrument make -
Rosemount XMTR & Trip Barton Press Switch Setpoint -
103 psid (prelim) 105.5 psid (prelim)
Main STM Line Low Press Instrument make -
Rosemount XHTR & Trip Barksdale Press Switch Setpoint -
766 psig 831 psig Main STM Line HI Rad Instrument make -
GE GE Setpoint -
118%
118%
Main Cond. Low Vac Instrument make -
Rosemount XHTR & Trip Supplied by AE Setpoint -
8.5" vac.
By AE Turbine Blda HI Temp Instrument make -
Riley (part of main Riley stm line area HI temp)
Main Stm Ln Area HI Temp Instrument make -
Riley Riley
. 2976G
c.
Retet Fuaction To reset the relay circuits and re-energize the pilot solenoids following a main steam line isolation (i.e., a trip in both trip system A and B which is subsequently cleared), the manual sultches for all of the main steam line isolation valves must be operalad to the closed position.
The switches in the reset circuit which energize relays whose contacts are in parallel with the seal-in contacts of the trip relays are then actuated.
To reset the relay circuits following a spurious trip of either system A or system 3 (not both) after the sensor (s) is reset, only the isolation reset switches must be actuated.
This reset operation is the same for both NMP2 and Hanford.
d.
Test Function Manual switches for the MSIVs are located on panel H13-P602.
There are two switches associated with each valve. One is a 3 position maintained-contact switch for valve control and one momentary switch for testing the valve. After the main control switches are placed in tne closed position and the trip logic reset the valves may be opened by placing the control switch in auto. To test the valve, assume the valve is open. The control switch is then placed in the test position.
This provides a permissive for the momentery test switch to energize the test solenold. Pushing the test switch and holding it, energizes the test solenoid and the valve proceeds to close. When the test switch is released the valve reopens. This operation is the same for both NMP2 and Hanford. Hanford differs only in that the main control switch is a different type GE 3 position maintained-contact switch nour ted on panel H13-P601 and the test switch is a different type pushbutton switch also mounted on panel H13-P601.
e.
Monitorina and Annunciation NMP2 has two white indicating lights for each valve (one on each pliot solenoid) to indicate solenoid energized. These lights are mounted on panel H13-P602. Also mounted on panel H13-P602 is a red and green indicating light to indicate valve open or closed. Hanford has the same light configuration except the red and green lights are mounted on panel H13-P601 and the white lights are mounted on backrow panels H13-P622 and H13-P623.
NMP2 monitors valve-open, valve-closed and valve initiation (valve solenoid A energization) by the GETARS system whereas Hanford monitors contrcl settch in auto position by their TDAS system and " logic ready for valve opening" (both pilot solenoids inboard and outbcard valves) to an isolation valve status and display system.
Both NMP2 and Hanford annunciate the following parameters:
Reactor vessel low water level, main condenser low vacuum bypass, main steam line high flow, main steam line low pressure, main condenser Icw vacuum. Also, main steam line high flow is sent to the computer for both plants. 2976G
WMP2 annunciates main stean line isolation system-out-of-service by monitoring the Rosemount trip units while Hanford monitors MSIV Div. I and Div. 2 trip channel de-energization.
NMP2 monitors trip unit in CAL or gross failure with status lights that have an integral test switch. Hanford does not have trip units and therefore does nct monitor this parameter.
NMP2 annunciates inboard and outboard reactor isolation
- ystem-out-of-service whereas Hanford annunciates NSSS Olv. 1 and Div. 2 out-of-service.
V.
ATTACHMENTS NMP2 One Line Otagram Normal 600V and 120VAC EE-M010-6 a.
b.
Pneumatic Control Circuits Schematic of MSIV Actuator Proposed NHP2 Nuclear Steam Supply Shutoff System (NS4) c.
Elementary Wiring Otagrams of Logic and Controls (four diagrams) d.
Simplified MSIV Power Supply One Line Diagram l 2976G
~ ~ "
4 MSIV POWER SUPPLY SATRRY sATERY BAcK-up BAm -up i
PREFERMD ALXRMAR PREFESSES ALMANAM NOAMAL STA10N -
- MSERW STA10N NORMAL STA10N -
- KKRW STAEON KRWCE MRWOE KRWOE MRWW i
NON-1E I
e CLASS-1E O
EPA EPA I
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EPA EPA I
I PNL A101 PNL 8101 1
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l PNL A106 PNL A106 PNL B105 PNL B106 l
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GREEN MEDI/ W E ELLOW XLLON/WER CHANNEL 1 CHANNEL 2 CHANNEL 1 CHANDEL 2 so}L l
sa set at 89 og I
OUTB0ARD M86V'8 INBOARD WWY'S FLCH.ltl772H.WIL A7 J
g.
s i
nSIV ACTUATOR i
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EXHAUST g EXHAUST (RESTRICTE01 feeffeez e
4-MAY 3-WAY y
Q 0 2 CLOSE l
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TO VALVE
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@ SOL-1 *' EXHAUST J L l
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J S SOL-3 l-o VENT Y-PATTERN PNEurlATIC ACTUATOR i
(SHONN IN DE-ENERGIZE 0/CLOSE0 CON 01 TION) 1 5
i TABLE OF OPERATIONS usv orEN l
nPs 1EsT FAST CLOSE (EMERGENCY) g
@ SK-1 15 K-EIIERSItte-1
@lmtv IS OPEll 8
@ SOL-2 4 3 ARE DE-ENER0!?ED.
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3-MAT VLW ACTUATES I
@ SOL-I IS EERSIFEB
@ 4-MAY VLV ODES 10 NORMAL.
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@pe-uAv nV anes To EmmusT l
' ' ' "'"" * * * - " 'o - c '
s
@ 2-WAY VLV OPENS.
ol 2-NAT VLV CLOSES ggTISI 4 ALLERIS TOLUIIE g
bl 4-NAT VLV ACTUATED 4 TO M RT T m M STRICTE
@ VOLunE @ VENTS THROUGH 2-WAY AIRFLOII REDIECTES EBIA421.
Vatyg a 4.way vt y 0-C 1.
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VOLuflE IS T VIA 1
@lWIV 8L888 CLOSES MEllL -
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@VOLUrIE Oi is ratssuairr0 vi A 8-C 4 V TO PMSOURE l
ePEs& TORS M-EMRSIIE R-l.
4-WAY VLv tA-nl uHitettomCtS AFTER IdlelCN MSiv BETuens nsIV tt oss o Ai NG WIIH j
VI A A-O 4 3-VLV.sMSIV OPEIfS.
I Te FIILL OPEN.
AC TUAiOR St'et i NG 'S.
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April 24, 1987 Docket No. 50-458 Mr. James C. Deddins Senior Vice President, (RBNG)
Gulf States Utilities P. O. Box 220 St. Francisville, LA 70775 ATTN:
Nuclear Licensing
Dear Mr. Deddins:
SUBJECT:
COMPARISON OF RIVER BEND AND NINE MILE POINT UNIT 2 WYE PATTERN GLOBE VALVE I am forwarding for your information and use a report prepared for Nine Mile Point Unit 2.
This report compares the electrical design of their wye pattern globe valve with those at Hanford and River Bend.
Please contact me for any further information on this matter.
Sincerely, Stephen M. Stern, Project Manager Project Directorate - IV DivisionofReactorProjects-III, IV, V and Special Projects
Enclosure:
DISTRIBUTION As stated Docket File NRC PDR Local PDR PD4 Reading cc w/ enclosure:
D. Crutchfield F. Miraglia See next page F. Schroeder OGC E. Jordan B. Grimes J. Partlow S. Stern P. Noonan ACRS (10)
PD Plant file JCalvo M. Haughey w/o enclosure A
PD4/D,,x b
4/PM nan SStern:sr JCalvo
/87 4/gy/87 4hy/87
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