ML20246F198

Forwards Progress Rept on Implementation of Control Room Enhancements as of End of 7th Refueling Outage for Unit 2

ML20246F198
Person / Time
Site:	Peach Bottom
Issue date:	06/30/1989
From:	Fogarty E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RTR-NUREG-0737, RTR-NUREG-737 NUDOCS 8907130150
Download: ML20246F198 (23)

Text

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NUREG 0737 PHILADELPHIA ELECTRIC COMPANY NUCLEAR GROUP HEADQUARTERS 955-65 CHESTERBROOK BLVD.

WAYNE, PA 19087-5691 (zis) sso-sooo l

June 30, 1989 Docket No. 50-277 U.G. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

SUBJECT:

Progress Report for Implementation of Control Room Enhancements Peach Bottom Atomic Power Station, Unit 2

REFERENCE:

Letter, S. L.

Daltroff, PECo, to l

D. R. Miller, USNRC, dated February 26, 1986;

Subject:

Control Room Design Review In the referenced letter, which transmitted the Control Room Design Review Report, we stated that a progress report on the implementation of the control room enhancements would be submitted to the NRC within two months following completion of the next refueling outage for Peach Bottom Units 2 and 3.

This letter provides the status of the control room enhancements as of the end of the 7th refueling outage for Unit 2.

A separate letter will be submitted after completion of the 7th refueling outage for Unit 3.

In the Control Room Design Review (CRDR) report, 262 Human

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Engineering Discrepancies (HED) were identified.

Each HED was assigned a priority (some separated into two priorities) with respect to safety using a significance scale of 1 to 6, indicating the overall likelihood of the HED to cause operator error.

The HED priority categories and numbers of HEDs assigned to each were:

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June 30, 1989 Page 2 Priority Number of HEDs Identified Complete 1

High Safety Significance 10 9

2 Low Safety Significance 44 40 3

Operational Reliability 26 16 4

No Significant Improvement 94 71 5

Previously Corrected 52 6

Not A Discrepancy 39 The subject, schedule, and completion status of the individual Priority 1 and 2 HEDs are provided in Tables 1 and 2 of to this letter.

In summary, the corrective actions for the Priority 1 HEDs were completed during the 7th refueling outage for Unit 2 except for HED El-02, PA System Access, which will be corrected during the 8th refueling outage as originally scheduled.

The corrective actions for the Priority 2 HEDs were also completed during the 7th refueling outage with the exception of HEDs TAl-01, TAl-06, TAl-16, VW-12, SP1-02, and D5-09, which will be completed during the 8th refueling outage or as indicated in Note 1 of Table 2.

The corrective actions for six Priority 2 HEDs has been revised.

The HED Assessment revisions are provided in Attachment 2.

During the implementation of the Priority 1 and 2 HEDs, the corrective actions for many Priority 3 and 4 HEDs were completed.

The completed Priority 3 and 4 HEDs are listed in Table 3 of.

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Should you have any questions regarding this progress report, please do not hesitate to contact us.

Very truly yours, l

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P.

Fogarty Manager Nuclear Support Division j

cc:

W.

T.

Russell, Administrator, Region I, USNRC T. P. Johnson, USNRC Senior Resident Inspector T. E. Magette, State of Maryland J. Urban, Delmarva Power R. A.

Burricelli, Public Service Electric & Gas H. C.

Schwemm, Atlantic Electric T. M. Gerusky, Commonwealth of Pennsylvania b

ATTACHMENT 1 Schedule and Status of Human Engineering Discrepancies (HED)

Table 1 - Priority 1 HEDs Table 2 - Priority 2 HEDs Table 3 - Priority 3 and 4 HEDs e

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TABLE 1 - PRIORITY I REDS EED Priority Schedule Actual / Forecast HED REV l

Al-09 Annunciator Silence Contro3 PRI1 7thRefuel 7thRefuel D2-05 Mimic Flow Direction PRI 1 8th Refuel 7th Refuel D3-03 Component String and PRI1 8th Refuel 7thRefuel Matrix Arrangement El-02 P. A. System Access PRI 1 8thSefuel 8th Refuel (D 13-01 Recorder Values PRI1 8thRefuel 7thRefuel 13-05 Hultipaint Recorder Speed PRI B:1 8th Refuel 7th Refuel B: Replace Recorder TR2-2-3-85 SD2-03 Containment isolation PRI 1 8th Refuel 7thRefuel Mimic Arrangement SD3-23 Control / Display Relationships PRI 1 7th Refuel 7th Refuel TAl-04 Isolation Summary Display PRI 1 8th Refuel 7thRefuel TAl-07 Reactor Level - 172 inches PRI A:1 7th Refuel 7thRefuel Yes A: Add Caution Tag e

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1 TABLE 2 - PRIORITY 2 HEDs EED Priority Schedule Actual /Porecast EPD REV l

Al-12

" Alarm Clear" Indication PRI 2 8th Refuel 7th Refuel Yes D5-01 Operation Limits & Warnings PRI 2 See TA HEDs 7th Refuel D5-02 Hierarchal Labeling PRI 2 8th Refuel 7th Refuel D5-06 Redundant Label Information PRI 2 8th Refuel 7th Refuel D5-09 incomplete Labels PRI 2 8th Refuel See Note 2 Yes 12-01 IndicatorZoneMarkings PRI 2 See TA EED 7th Refuel 13-03 Recorder Alarm Points PRI 2 See TA HED 7th Refuel 15-07 Recorder Pen Colors PRI 2 8th Refuel 7thRefuel 13-11 Recorder Zone Markings PRI 2 See TA HED 7thRefuel 15-05 Inadvertent Control PRI 2 8th Refuel 7th Refuel Activation P4-01 Peedback to operator PRI 2 Dec 1987 7th Refuel SD3-14 HFCIindications PRI 2 8thRefuel 7th Refuel ED3-18 Control Grouping PRI 2 8th Refuel 7th Refuel SD3-19 Control Grouping PRI 2 8th Refuel 7th Refuel SD3-21 RHR Indicator Arrangements PRI 2 8th Refuel 7thRefuel SD3-28 Reactor Mode Switch Location PRI 2 8th Refuel 7th Refuel SPI-02 Procedure Terminology Update PRI 2 See VW See Note 1 HEDs NRC2-Il Torus Level Zone Marking PRI 2 Complete 7thRefuel NRC2-12 Reactor Level Accuracy PRI 2 Complete 7th k fuel LER-06 Diesel Generator Restart PRI 2 8thRefuel 7th kefuel Procedural Requirements LER-08 Valve Alignment Procedural PRI 2 8th Refuel 7th Refuel Requirements LER-14 Reactor Vessel Heat-up Rate PRI 2 8th Refuel 7thRefuel LER-18 Improper Switch Position PRI 2 7th Refuel 7th Refuel

t TABLE 2 - PRIORITY 2 EF9s EED Friority Schedule Actual / Forecast HED REV LER-19 ImproperVa: reoperation FRI 2 8th Refuel 7th Refuel TAl-01 Reactor Cooldown Rate FRI2 With Eth Refuel (F)

ComputerHad TAl-02 Reactor Level - 48 inclies PRI 2 8th Refuel 7th Refuel TAl-05 HFCI Initiation Signal FR1 2 8th Refuel 7th Refuel.

Yes TAl-06 LFCI Flow Resolution FRI 2 8th Refuel 8th Refuel (F)

TAl-07 Reactor Level - 172 inches FRI B:2 8th Refuel 7th Refuel Yes B: Zone Mark Ecales TAl-08 EFCI & RCIC Hanual Initiation FRI 2 8th Refuel 7th Refuel TAl-09 CSManualinitiation FRI 2 8th Refuel 7th Refuel TAl-10 LFCI Manual Initiation PRI 2 8th Refuel 7th Refuel TAl-ll ADS Timer Reset FRI 2 8th Refuel 7th Refuel TAl-16 SRV Instrument K2 Alarm FRI 2 8th Refuel 8th Refuel (F)

Yes TAl-17 TORUS Level Range FR1 2 8th Refuel 7th Refuel TAl-20 TORUS Level 18.5 feet FRI 2 8th Refuel 7th Refuel TAl-21 TORUS Air Space Temperature PRI 2 8thRefuel 7th Refuel Yes TAl-22 TORUS Fressure Range FRI 2 8th Refuel 7th Refuel VW-01 ADS Numbers FRI 2 8th Refuel 7th Refuel W-04 Orifice Bypass Valve Tag FRI 2 8th Refuel 7th Refuel VW-06 Torus Fressure Instrument No.

PRI 2 8th Refuel 7th Refuel VW-11 ECCS Instrument Color Fads PRI '.

8th Refuel 7th Refuel VW-12 T-200SeriesNomenclature PRI 2 7thRefuel See Note 1 VW-15 T-221 Valves Not Found FRI 2 8th Refuel 7th Refue.1 Note 1: Revisica of T100 series procedures depends upon revised EFCs from the BWR Owners Group.

These are presently scheduled for completion in late 1989-early 1990.

Revision of T200 series procedures is in progress. Five (S) have been approved by FORC and issued.

The remainder are in various stages of revision and are scheduled for completion by the end of 1989 Note 2: Controllers were relabeled during the 7th refueling outage. Review shows that some additional labels would be helpful. Application of these labels is not outage related and is forecast complete by 12/31/89.

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.p TABLE 3 COMPLETED HEDs PRIORITY 3 AND 4 Al-03 Annunciator Type Style PRI 4 Al-06 Multi-Choice Alarms PRI 4 Al-07 Annunciator Priority PRI 4 Coding Al-08 Annunciator Identification PRI 4 Al-10 Annunciator Control Arrangmt PRI 3 DI-02 Console Control Reach Dist PRI 4 D1-04 Mirror Imaging of Panels PRI 4 D1-05 Uncovered Panel Holes PRI 4 l

D2-01 Control Distinction PRI 4 D2-02 Demarcation and Mimic Lines PRI 3 D2-03 Demarcation Lines Contrast PRI 4 l

l D2-04 Mimic Flowpaths PRI 3 D2-06 Mimic Consistency PRI 4 D3-01 Control / Display Grouping PRI 4 l

l D3-04 Color Coding Consistency PRI 3 l

D3-05 Control Display Height PRI 4 l

l D4-01 Color Standards PRI 4 DS-03 Panel Identification PRI 4 DS-05 Label Type and Style PRI 4 D7-01 Control Panel Access PRI 4 D7-03 Movable Obstructions PRI 4 D7-04 Low Control / Display PRI 4 Visibility D7-06 Annunciator Location PRI 4 l

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TABLE 3 - COMPLETED HEDs PRIORITY 3 M4D 4 E3-02 Protective Clothing PRI 4 E4-02 Telephone Cords PRI 4 11-01 Controller Height Low PRI 4 I2-03 Scale Units PRI 4 I2-04 Pointers Obscure Markings PRI 4 I2-06A Display Grouping PRI 3 I2-08 Excessive Scale Graduations PRI 4 I3-08 Recorder Marking Procedure PRI 4 15-02 Position Indication Labels PRI 3 15-03 Position Markings PRI 3 15-04 Control Height PRI 4 15-06 Label & Indicator visibility PRI 4 15-07 Control Shape Coding PRI 4 15-08 Label & Pointer Visibility FRI 4 15-09 Emerg Control Identification PRI 4 PI-04 Annunciator Response Card PRI 4 Identification SDI-01 opposing Surfaces Close PRI 4 SD2-02 Containment Purge Mimic PRI 3 Arrangement SD3-01 Control / Display Grouping PRI 3 l

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SD3-03 Air Ejector Indications PRI 4 SD3-04 Air Ejector Controls PRI 4 SD3-05 Air Ejector Controls /

PRI 3

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l TABLE 3 - COMPLETED HEDs PRIORITY 3 AND 4 SD3-06 Condensate Panel Control PRI 4 Grouping

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SD3-08 Turbine Drain Controls PRI 4 SD3-09 Drain Tank Dump Indications PRI 4 SD3-10 Drain Tank Drains PRI 4 SD3-11 Recire indications not PRI 4 Grouped SD3-12 CRD Indications PRI 4 I

SD3-13 HPCI Controls PRI 4 SD3-15 Controls Arrangement PRI 4 SD3-16 Display Arrangement PRI 3 SD3-17 Display Arrangement PRI 3 SD3-20 Containment Ventilation PRI 4 Control Arran.gement SD3-22 Drywell Pressare Indicator PRI 4 Arrangement SD3-25 Indicator Arrangement PRI 3 SD3-26 Control Grouping PRI 4 SD3-27 Control Color Coding PRI 4 SD4-01 Label Location PRI 4 SD5-02 Control Position Escutcheons PRI 3 SIl-01 High Module Locatisn/

PRI 4 Readability SI2-01 Recorder Location Low PRI 4 S!2-05 Selector Light Color PRI 4 SI3-01 Recorder Pen Colors PRI 4

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TABLE 3 - COMPLETED HEDs PRIORITY 3 AIF 4 SPI-01 te Shutdown Panel PRI 4 Procedures l

ST1-01 Training Update on PRI 3 Enhancements NRC2-01 Torus Recorder Scales PRI 4 NRC2-02 Extra Scale on Chart PRI 4 NRC2-03 Label Terminology PRI 4 ImC2-05 Scale Increments Too Large PRI 3 TAl-24 HPSW to RHR Drain PRI 4 TAl-25 Reactor Pressure 330 PSIG PRI 4 TAl-27 Reactor Pressure 150 PSIG PRI 4 TAl-28 Reactor Torus Delta P PRI 4 TAl-30 Procedural Reference PRI 4 TAl-31 Procedural Reference PRI 4 TAl-32 Generator Load 5%

PRI 4 TAl-33 Core Map Green Light PRI 4 VW-03 Turbine Speed Label PRI 4 VW-07 Torus instrument Color Pads PRI 4 VW-08 HPSW to LPCI Mimic PRI 4 VW-09 HPCI Turbine PB Color PRI 4 VW-10 Location of Rx Instruments PRI 4 VW-13 T-200 Series information PRI 4 VW-14 T-220 Step Not Clear PRI 4

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h' ATTACHMENT.2 Revised Human Engineering Discrepancy (HED) Assessments HED No. Al-12 BED No. D5-09 HED No. TAl-05 HED No. TAl-07 1

1 HED No. TAl-16 HED No. TAl-21

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HED ASSESSMENT

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REVISED 6/89 HED No. A~-12 EP =

8/PRI 2 Code D l

TITLE:

" Alarm Clear" Indication COMMENT:

No indication exists for a cleared alarm Item: 4.3.12 Ref: C6.4 Source: CRS IDENTIFICATION:

Panel:

All Component:

Annunciators ID or Number:

N/A DESCRIPTION:

Ne special cue is available to an operator (e.g a slower blink rate) to indicate when an alarm input clears. The operator must determine,on his own, that the alarm has cleared.

RESOLUTION:

(Sched:

None

)

The previous resolution of this HED required the position on of the internal annunciator slide switch to be engraved on the annunciator window. Alarm cards were to be revised to indicate the required setting. Guidelines for setting switches were to be provided. This resolution is revised. The slide switch position will not be engraved on the annunciator windows. Revised annunciator procedures have been prepared to show the required position of the slida switches.

TRAINING REQUIREMENTS:

Train operators in system for required settings.

PROCEDURE REQUIREMENTS:

Revised annunciator window setting procedure now in place REASON FOR REVISION:

The desire for additional controls has led to generation of a station annunciator log / procedure in which the switch settings are contro11ec.

The oparating philnenphy in to reqitive a ggre sts i ve Fn1.1nvup nn alarmc..

Further review shows that the originally conceived engravings would be confusing.

Team Approval Signature:

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F7 ASSESSMENT REVISED 6/89 HED-No. D5-09 EP =

6/PRI 2 Code A

. TITLE:

-7.ricomplete Labels COMMENT:

Controller. Labels Incomplete Item: 4.1.5.9 Ref:A5.10 Source: CRS

. IDENTIFICATION:

Panel: All Component: Controllers ID or Number: All DESCRIPTION:

Controller labels do not clearly specify what a change in output will do to the process being altered. See attached.

RESOLUTION:

(Sched: 1989 Non Outage )

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'. Controllers will be labeled to clearly specify what a change in output will do to the process being altered.

TRAINING REQUIREMENTS:

None.

PROCEDURE REQUIREMENTS:

None.

REASON FOR REVISION:

Labels have been added to controllers as shown on the at tached pages 1 through 4. Attached pages revised to correct typographicci errors. Additional labels to be added to clarify process parveters -

l Scheduled for completion by 12/89.

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. Human Factors

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There'are 40 controllers on Unit 2. They have 11 different variations. Some variations look similar to others but are different. There are no labels that indica *.e the function of the-meters. Some controls are labeled with functions, some are not.

'The 11 variations are described below and have been given arbitrary numbers 1 through 11.

1. 1 Scale 0-100, no units,no function identified 4

Scale 0-100, no units, label added to show valve "open" and "close" Knob marked RAISE l @

1. 2 Scale 0-100, no units, label added to show

" controller output" l

l Scale 0-100, no units, 2 labels added to show "open" and " closed"

[O Knob marked RAISE Added Label:" TEMP"

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1. 3 Hierarchical label added

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Scale 0-100, no units, 2 labels added for valve "open" and " closed" Knob marked RAISE i abel: FLOW" to be added

1. 4 THERE ARE NO #4 CONTROLLERS IDENTIFIED ON PAGES 5 OR 6. Sketch Deleted.

1. 5 Vertical scale 0-100, no units, no function identified.

Scale, 0-100, no units, labels added for valve "open" and " closed" Right knob marked RAISE

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1. 6 Black line center scale, no numbers, no units, no function identified. 7 reference lines connecting 2 scales.

i Circular scale with knob to control Y@

l pointer. Scale numbered, no units, no e

function identified.

Scale 0-100, no units, no function identified.

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Left knob labeled Auto and Manual.

Right knob labeled RAISE Label: " LEVEL"," FLOW" OR " SPEED" to be added El THERE ARE NO TYPE 7 CONTROLLERS IDENTIFIED ON PAGES 5 OR 6

1. 8 I

I Scale above controller 0-1.0, no units, function not identified.

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Scale with center marked 0, no units, function not identified.

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i Small circular scale with knob to control pointer. Scale numbered, specifies units, and is labeled SET POINT.

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Scale 0-100, no units, function labeled OUTPUT O

Small knob, no function indicated. Slide switch marked Auto and Manual.

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HED D5-09 Attachment Page 4

1. 9 Scale with 10,5,0,5,10 or 0-100, no units, no function identified.

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Label:" DEVIATION" to be added I

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I NO ENHANCEMENTS DEEMED FEASIBLE HERE Large knob with three positions labeled Auto-Balance-Manual. Appears to be a dual function knob; second function not identified.

1. 10 Left section of scale for pointer movement.

i Center scale is rotating drum with numbers, no 1

units, no function identified.

p Right vertical thumbuheel controls drum scale, no indication or direction of movement. Drum rotates opposite direction from thumbuheel.

Knob has five positions: 0-100, Auto, Balance, Manual, 0-100. Appears to be dual function knob; second function not identified.

1. 11 Scale above controller 0-100, labeled "open" and i

" closed".

Left section of scale for pointer movement.

Right scale 0-60 with units indicated, no function indicated. Knob to left of scales labeled "SP." " LEVEL" tag to be added.

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Scale 0-100, no units, no function identified.

l Three pushbuttons labeled +, Manual / Auto Transfer, -

left to right. Order of +

and - in one case different from other q

Type 11 controllers.

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l HED D5-09 Attachment Page 5 PANEL 20C07A:

2 Air Ejector Steam Pressure PIC-2239A/B Type 11, Lower t'cales Marked, open on left, closed on right.

3 Condenser Deaerating Steam CV-2468 A/B/C Type 1 l

1 Hotwell Level, Coarse LC-2087 Type 11, Scale marked "REJ" (-) on left, "MU" (+)

l on right, center MAN / AUTO I

.-Hotwell-. Level, Fine -- -- LC-208 6 Lower Scale marked "REJ" (-) on left, l

Typ"e 11(+$onright "M0 1

Recirc Flow FC-2210 Type 6 2LC05A:

1 Feed Pump Bypass CV-2558 Type 8 Knob marked CLOSE, OUTPUT, OPEN (See HED SS-01) 3 Reactor Feed Pump Controls A,B,C Type 9 Lower scale marked CLOSF on left, OPEN on right 1

Master Flow Type 10 Lower scale marked CLOSE on left, OPEN on right 1

C FD PP Disch Bypass Type 11 Lower scale marked CLOSE on left PB (+),

OPEN on right PB (-)

1 Recirc Master Flow (not used )

Type 9 Lower scale marked CLOSE on left, OPEN on right 1

CRD Flow control Type 10 Lower scale marked CLOSE on lef t, OPEN on I

right 20C04A:

2 Recirc Pump Speed A,B Type 9 Lower scale marked "C" on left, "0" on right 1

Dump Flow CV-12-55 Type 3 Scale has "close" on left, "open" on right 1

Head Spray Flow CV-43 Type 10 Lower scale marked CLOSE on lef t, OPEN on right

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20C07B:

3 RFPT LO CW CV-2532 A,B,C Type 2 Parameter being controlled not indicated 20C08B:

Turbine Lube Oil Cooling"O" on left, Water CV-2483 1

Type 2 Upper scale has "C" on right. Lower scale not marked.

00C123:

4 Sluice Gates Bay Level Type 6 20C09:

2 Gen H2 Cooling HCS-2485 Stator Cooling HCS-2487 Type 2 20C04B:

1 HPCI Pump Flow FC-2-23-108 Type,10 Lower Scale has "CLOSE" on left, "0 PEN" on right.

20C04C:

1 RCIC Pump Flow FC 2-13-91 Type 10 Lower Scale has "CLOSE" on left, "0 PEN" on right.

20C03:

2 RHR Pump Discharge

'CV-2677 A/B Type 5 20C484A/B:

2 Containment N2 Supply HCS FI 4947 A/B Type 2 Lower scale has "0" on left, "C" on right

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l Bleed Flow Drywell HCS-FI 4957 Type 2 Lower scale has "O" on lef t, "C" on right 00C196:

1 Jet Comp. Steam Pressure PC-4018 Type 6 20043:

1-RSP RCIC Pump Flow Type 10

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Code B TITLE:

HPCI Initiation Signal COMMENT:

No indication that ECCS initiation signal has been generated.

Item: N/A Ref: N/A Source: TA IDENTIFICATION:

Panel:

Component:

ID or Number: T-101 RC/Q, Step lb DESCRIPTION:

No indication that ECCS initiation signal has been generated.

(Rapid Action)

MITIGATING CONSIDERATIONS:

Annunciator alarms exist for Reactor Low Low Level and Drywell High Pressure, both initiating conditions for HPCI.

RESOLUTION:

(Sched: Complete

)

l The Reactor Low Low Level and Drywell High Pressure are the only two conditions that initiate HPCI automatically.

l TRAINING REQUIREMENTS:

Additional training in meaning of colored annunciator windows l

PROCEDURE REQUIREMENTS:

Station procedure for coloring annunciator windows.

REASON FOR REVISION:

Verification of HPCI initiation is by visual verification of HPCI flow.

Annuciator windows are colored in accordance with the newly developed

- window coloring procedure.

Team Approval Signature:

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-g. cl-PEACH BOTTOM HED ASSESSMENT REVISED 6/89 HED No. TAl-07 EP =

/PRI 1/2 Code TITLE:

Reactor level -172 inches IX)MMENT:

Cannot read discrete level of -172 inches as required by procedure.

Item: N/A Rer: N/A Source: TA IDENTIFICATION: Panel: 20C03, 20C04C

-- -Componen t : LI-2-3-91

, LR-2-3-110A/B, LI-2-3-113 ID or Number: T-101 RC/L, Step 3 DESCRIPTION:

There is no line on scale at -172 inches which is the too or active fuel. In addition, the level may not be correct when flow is present in jet pumps (e.g. Recire o'r LPCI injection }

(Rapid ac tion}

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EESOLUTION:

(Sched: Complete 1 Zone mark scales to indicate -172 inches. Add an intorsation tag to panels to indicate that there will be a level error when flow is present in jet pumps. A: Information tag Pri 1 I

l 3: Zone Mark Pri 2 TRAINING REQUIREMENTS:

Train operators in meaning of zone markings.

l PROCEDURE REQUIREMENTS:

i New zone marking procedure now in place.

REASON FOR REVISION:

Indicator numbers changed by subsequent modifications. Caution tag changed to information tag. A future plant modification is expected to delete the requirement for this tag. No zone marking was applied to recorders LR-2-3-110A/B because of scale crowding (SEE HED NRC2-12 ). Zone marking added to indicators.

Team Approval Signature:

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PEACH BOTTOM HED ASSESSMENT REVISED 6/89 HED No. TAl-16 EP:

/PRI 2 Code D TITLE:

SRV Instrument N2 Alarm COMMENT:

.The alarm is too far away from the SRV Control Panel.

Item:

Ref:

Source: TA IDENTIFICATION:

Panel: 20C209L Component: ADS NITROGEN HI/ LOW Pressure ID or Number: T-101 RC/P, Step 9b DESCRIPTION:

The SRV controls are on Panel 20C03(2). To' operate the SRVs, instrument N2 must be available. The absence of instrument N2 is announced by an alarm over Panel 20C09 approximately 28 feet away in the-same plane.

(Deliberate Action)

RESOLUTION:

(Sched: 8th Refuel

)

(1) The original resolution of this HED was to color the alarm window amber to alert operators to take immediate action.

(2) The revised resolution is to move the alarm window to an annuciator associated with Panel 20C03(2).

TRAINING REQUIREMENTS:

Train operators in new annunciator window location PROCEDURE REQUIREMENTS:

Revise procedures to include new annuciator window location.

REASON FOR REVISION:

Recent modifications have added spare annunciator windows which were not available when this HED was orignally written.

Team Approval Signature:

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t PEACH BOTTOM HED ASSESSMENT REVISED 6/89 HED No. TAl-21 EP =

/PRI 2 Code A TITLE:

TORUS Air Space Temperature COMMENT: There is no indication of TORUS Air Space Temperature Item:

Ref:

Source: TA IDENTIFICATION:

Panel: N/A Component: N/A ID or Number: None DESCRIPTION:

There is no indication of TORUS air space temp.

MITIGATING CONSIDERATIONS:

Pres 2nt method of determining TORUS temperature to initiate TORUS spray to allow air space to come into equilibrium with spray temperature, then read spray temperature.

RESOLUTION:

(Sched: None

)

Previous resolution was to install a TORUS air space temperature indicator. Revised resolution is to accept the condition as is.

TRAINING REQUIREMENTS:

None.

PROCEDURE REQUIREMENTS:

None.

REASON FOR REVISION:

Recent changes in EPGs have deleted the requirement to

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measure TORUS air temperature. No additional work to be done.

Team Approval Signature:

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ic O

Ope ratans/

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Engineering f

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( ) Add'l page(s) attached Human Factors

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