ML20129D646

Sys Procedure Sp 1105.11, SPDS Operating Procedure

ML20129D646
Person / Time
Site:	Davis Besse
Issue date:	03/27/1985
From:	Quennoz S TOLEDO EDISON CO.
To:
References
SP-1105.11, NUDOCS 8507300123
Download: ML20129D646 (11)

Text

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• SP 1105.11

s Davis-Besse Nuclear Pcwer Station i '

Unit No. 1 Systen Procedure SP 1105.11 Safety Parameter Display Systen Operatim Procedure i . .

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1 SP 1105.11.0 s 1.0 PL*RPOSE This procedure's main purpose is to describe how to use the Safety Parameter Display System (SPDS). This procedure does not discuss the historical basis for SPDS or go into an extended discussion of the design basis. This information is available in the Davis-Besse SPDS Safety Analysis Report (to be completed by May 1, 1985).

The principal purpose of the SPDS is to aid the Control Room personnel during abnormal and emergency conditions to determine the safety statu.c of the plant. The SPDS displays available in the Control Room are also available in the Technical Support Center (TSC) and Emergency Centrol Center (ECC) to aid in the assessment of plant conditions both during normal and emergency operation.

Information from plant process instrumentation provides input to both the plant process computer (MODCOMP) and a separate multiplexer (Validyne) which is used as the primary source of data to the SPDS.

Information from the plant process computer via the multiplexer is then transmitted to the Davis-Besse Administration Building. The computer system located in the Technical Support Center receives the information, stores the information, and generates the displays necessary for the SPDS displays. The info"mation received from the Station is stored in a circular file for a period of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Two different types of display devices are available in both the Control Room and Technical Support Center. The Ramtek units are the primary SPDS display devices. These units have complete

(-

historic capability and contain all the required SPDS displays.

The Chromatics unit is also provided in the Control Room and Technical Support Center to provide increased graphics capabilities and a quicker display capability. Although the Chromatics units have all the required SPDS displays, the Chromatics units cannot be used to review hiscoric data.

Alarm boxes are displayed on the bottom of all displays associated with the SPDS. These alarms are activated by parameters reaching specified setpoints. Associated with each of the alarm boxes is another lower level display showing an historical trend of parameters selected to assist the operator in determining the status of the associated safety function. These six lower level displays and the top level alarm box display constitute the minimum SPDS display format.

Also associated with each of the alarm boxes is an upper level display which can provide the operator with additional information in various formats that may be useful in establishing the status of a given safety function. These upper level displays are not considered a part of the minimum SPDS.

If any alarm logic is satisfied, the appropriate critical safety function box will be lit and flash. Once the operator has called up the upper or lower level display for the alarm, the critical safety function box will no longer flash, but will remain lit for as long as the alarm condition exists. The critical safety function n

2 SP 1105.11.0 box will return to normal (unlit status) automatically after an ;

acknowledged alarm clears its alarm setpoint. If any new alarm

, occurred while a critical safety function box is lit, the new alarm will cause the critical safety function box to again flash until the appropriate upper or lower level display is called up. Space is available on each upper and lower level display to indicate j which alarm condition has caused the critical safety function to be lit. For example, if a low pressurizer level occurs (less than ten inches), the Primary critical safety function box will be lit and i flash until a primary display is selected by the operator. On the 4 primary display there will be a (PRESSURIZER LEVEL LOW) alarm i printed near the bottom of the screen.

The lower level trend displays of the Davis-Besse SPDS are designed

] to provide the operator with historical information useful in l~ determining the status of the critical safety functions. Each lower level display features trends and instantaneous values of

, plant parameters that are primary indicators of the status of the associated critical safety function. Current values of each trend parameter are provided at the right hand margin of each display, j along with the parameter point identification number. This instanta-neous data, the graphically trended data, and the corresponding ,

scale information are color coded to allow simple identification of each parameter. The trend display provides a minimum of 25 minutes 1

of historical data plotted from left to right, up to the zero time scale indication. As current data is displayed, it is added to the trend until the screen-is filled. At that point, the trends are "N scrolled to the left in one five minute increment to return to the /

.end of the trends to the zero time scale. If the computer point is identified as being invalid, that information is being provided to the user by displaying an instantaneous value of -99.0 printed in white in the.right hand margin of the display.

i Additional information on the display parameters and the alarms for each of these displays is available in the Davis-Besse SPDS Safety Analysis Report. Operation of the unit will be discussed in Section 4 of this procedure.

2.0 PRECAUTIONS AND LIMITATIONS None

3.0 REFERENCES

( 3.1 Toledo Edison submittal letter, Serial Number 1011, dated November 30, 1983 3.2 Davis-Besse Unit 1 SPDS Safety Analyis Report 3

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3 SP 1105.11.0

- -w 4.0 NORMAL OPERATION k

4.1 Access From the RAMTEK Terminal 4.1.1 Turn terminal on by depressing the upper half of the black power switch (also see Figure 3 for RAMTEK layout).

4.1.2 Type M l RETURN l

1. This message will then appear on the screen:

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- PLEASE BE PATIENT -

< - LOADING FUNCTION KEYS -

- THIS WILL TAKE APPROXIMATELY I MINUTE --

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(,"j 2. Af ter approximately oc.e minute, the TSC MENU will be displayed:

TSC MENU fl - SPDS f2 - CRT DISPLAYS f3 - HARDCOPY f4 - GROUP ASSIGNMENTS f5 - DOSE CALCULATIONS f6 - ENGINEERING AIDS

-l f7 - OPERATCR AIDS f8 - SPDS TEST VERSION f9 - SPARE (

fa - TSC MENU - \.

j fb - LOGIN ON SYSTEM B fc - LOGOUT NOTE: The color scheme is as follows:

Blue - Currently Available Yellow - Proposed - Currently Unavailable Green - Special Purpose v

_ _ _ _ _ . _ _ _ _ _ _ . _ _ _ . . _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ . _ _ _ _ _ . _ _ . _ . _ _ _ _ _ _ _ _ _ _ _ _ . . _ . _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ ____..____.___________________._____o

4 SP 1105.11.0

3. By depressing l fl I the SPDS Menu will be +-

displayed:

SPDS MENU fl - PRESSURE VS TEMPERATURE (LP 1) cf1 - P/T TRENDS f2 - SPARE cf2 - PRIMARY TRENDS f3 - STEAM GENERATOR cf3 - SECONDARY TRLNDS f4 - SPARE cf4 - RADIATION TRENDS f5 - SPARE cf5 - CONTAINMENT TRENDS f6 - SPARE cf6 - REACTIVITY TRENDS f7 - PRESSURE VS TEMPERATURE (LP 2) cf7 - SPARE 29 - SPARE cf8 - SPARE f9 - SPARE cf9 - SPARE fa - SPDS MENU cfa - TSC MENU fb - REAL-TIME MODE cfb - HISTORICAL MODE fc - SPARE cfc - LOG 0FF SYSTEM

4. To get into a specific display, hit the corresponding function key.

5. If you are not sure where you are at some particular time:

a) Depress the function key I fa l to bring you back to the specific menu.

(OR) b) Depress the function key l W l l fa l to bring you back to the TSC MENU.

6. To Log Off:

i a) Go back to the TSC MENU (depress l W l 1 l fa l TSC MENU) and log off by depressing i the l fc l- LOGOUT function key.

(OR) b) Hit the l BREAK l key on the keyboard.

Type Q l RETURN j.

1 Type Q l RETURN l .

(OR) c) When the program is finished running, after the OK, prompt, type W l RETURN l.

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SP 1105.11.0 5

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. , 7. Once the logged off display comes up, turn

(-n terminal off.

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4.1.3 If problems are experienced, attempt to clear the system and start over by:

1. Making sure all console switches in the right hand corner of the keyboard are in the UP position (see diagram of keyboard).

2. Clearing the system VIEW a) Press ALPHA b) Press the l RESET l button on the back of the keyboard (see diagram of keyboard).

c) Press l BREAK l.

d) Type Q l RETURN l .

e) Look for the OK, on the screen, then type "

l L2 I RETURN l, f) Wait for another OK, on the screen, then type M l RETURN l.

The function keys should be reloaded, and the TSC MENU should appear.

4.1.4 Helpful Hints

1. .The l BACKSPACE l key is used to delete

, characters.

2. The l BREAK l key halts execution of the current updating pro' gram. When executing the CRT display program, the " break" key sends the user back to Level 1 of the display options.

VIEW

3. The ALPHA key displays on the screen all alpha communication between terminal and the

computer.

VIEW

4. The GRAPH key displays on the screen the most recent graphic output.

M

5. The BOTH key allows the user to view both the graphic and alpha modes simultaneously.

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6 SP 1105.11.0 4.2 Access From the Chromatics Terminal -T 4.2.1 Turn terminal on by depressing the square switch on the front of the unit. (located above the keyboard on the right side) ,

4.2.2 This menu will appear:

TSC MENU fl - SPDS DISPLAYS f7 - OPERATOR AIDS f2 - SPARE f8 - SPARE f3 - SPARE f9 - SPARE f4 - SPARE fl0 - SPARE f5 - SPARE fil - SPARE f6 - SPARE f12 - TSC MENU NOTE: The color scheme is as follows:

^

Blue - Currently Available Yellow - Proposed - Currently Unavailable Green - Special Purpose 4.2.3 To get into a specific program, hit the corresponding 3 function key. j 4.2.4 If you are not sure where you are at some particular time:

1) Depress the function key l W l to bring you back to the specific menu.

(OR)

2) Depress the function key l s*f12 lto bring you back to the TSC MENU.

4.2.5 To Log Off:

1. Go back to the TSC MENU (depress l s*fl2 l -

TSC MENU) and depress the on/off switch.

4.2.6 If problems exist, or the system is not responding as expected, attempt to clear the system and start over by depressing the orange RESET key (top row of keyboard - far left).

1

• s = Shift Key .

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. 7 SP 1105.11.0 FIGURE 1 SPDS BASIC CONFIGURATION

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PLANT PROCESS INSTRUMENTATION i  :.

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CLASS 1E ISOLATION EQUIPMENT FOR SAFETY ~~

SYSTEM SIGNALS

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PLANT PROCESS g I I COMPUTER PIAvr .. -

i V V V i DEC PROCESSOR I DADS PROCESSOR v V I TSC & ECC TSC DISPLAY DISPLAYS I

i DAVIS-BESSE ADMINISTRATION SUILDING M - - - -

M V V CONIROL ROOM CONTROL ROOM DISPLAT DISPLAY ,

CONTRCL ROOM .

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1 8 SP 1105.11.0 ,

FIGURE 2 l SPDS HARDWARE CONFIGURATION s

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KET30ARD KZT30ARD

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