ML19326D878

Forwards Main Control Room Design Review Commitments Per NRC Main Control Room Review Team 800715 Discussions W/Util

ML19326D878
Person / Time
Site:	Farley
Issue date:	07/17/1980
From:	Clayton F ALABAMA POWER CO.
To:	Schwencer A Office of Nuclear Reactor Regulation
References
NUDOCS 8007230492
Download: ML19326D878 (9)

Text

e Alabama Power Company

- . 600 North 18th Street Post Office Box 2641 Birmingham. Alabama 35291 Telephone 205 323-5341 h k hkei'sc7?rkfe'ni Alabama Power the southern electnc system July 17, 1980 Docket No. 50-364 Director of Nuclear Reactor Regulation U. S. Nuclear Regulatory Corr ~.ission Washington, D. C. 20555 Attention: Mr. A. Schwencer JOSEPH M. FARLEY NUCLEAR PLANT - UNIT 2 CONTROL ROOM DESIGN REVIEW Gentlemen:

As a result of discussions held with the NRC Main Control Room Review Team on July 15, 1980, Alabama Power Company submits Enclosure (1) documenting the main control room design review commitments.

Yours very truly, T, .~ _. _ :- -

F. L. Clayton, Jr.

FLCjr/BDM:rt Enclosure cc: Mr. R. A. Thomas Mr. G. F. Trowbridge Mr. L. L. Kintner Mr. W. H. Bradford 8 t d 72 3 0 W.7 A

CATEGORY 1 DISCREPANCIES NRC Concern

a. Control Room Noise - Noise measurements taken at 3 locations throughout the control room ranged from a low of 66 dB(A) to a high of 76.5dB(A).

Response

The background noise originates from the air conditioning ducts located in the control room ceiling. Alabama Power Company will relocate the volume control diffusers and rebalance the flow rates throughout the system before exceeding 5% power. This relocation and rebalancing should reduce the background noise to an acceptable level. Alabama Power Company will perform a confirmatory sound survey to verify that the noise level is at an acceptable level before exceeding 5% power.

NRC Concern

b. Annunciator Prioritization - With the exception of the first out, annunciators lack prioritization by color.

Response

Alabama Power Company will develop a list of annunciators that should L.

receive more operator attention during an accident. Identified,gnnun-ciators will be prioritized by color before fuel loading.

NRC Concern

c. Annunciator Alarms - Alarms levels are barely audible above ambient noise levels.

- Response Alacan. Power Company will increase the main control board, balance of plant and emergency power board annunciator alarm levels to 6-8 dba above the ambient noise level prior to initial criticality. Reduction of the background noise will result in more audible alarm levels.

NRC Concern

4. Accidental Actuation - Switches (GEMCO) near the edge of the console are subject to accidental actuation.

Response

Alabama Power Company will extend the horizontal portion of the main control board to prevent inadvertent operation of controls before initial criticality. A

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NRC Concern

e. Color Coding - Color of demarcation tape has no significance and the tape is not a permanent installation.

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Response

Alabama Power Company will review the color utilized for demarcation.

A color will be used that provides significance and the tape will be

- pennanently installed before exceeding 5% power.

4 NRC Concern

f. Operator Aids - All operator aids should be made permanent (i.e., yellow tape used to flag important meters).

Response

Alabama Power Company will permanently install operator aids before fuel load.

NRC Concern

g. Labeling - Components, systems, subsystems and panels, back panels and some components are mislabeled.

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Response

f . Alabama Power Company will review the main control board and will relabel as required before fuel load.

. NRC Concern

._ h. process Computer - One of two CRT's is inoperable; alarm printer paper feed is not operating properly.

Response

Alabama Power Company will ecoect the paper feed problem and ensure that both main control room CRT's are operable before initial criticality.

NRC Concern.

1. Controllers - All reverse acting valve controllers should be either changed, oriented or labeled for consistent open/close or increase / -

decrease positions.

Response

Alabama power Company will consistently label (open/close) reverse

. acting valve controllers before fuel load.

NRC Concern

j. Tolerance Ranges - No normal or out of tolerance ranges are indicated on meters.

Response

Alabama Power Company will provide for norma'., alert and alann ranges for the significant main control room meters. As a first priority.

meters identified in emergency procedures will be completed before exceeding 5% power. Other significant meters will be completed as information is available, but will be finished before completion of the initial refueling outage.

NRC Concern -

k. Emergency Diesel Generator - There are no provisions for lamp test on diesel generator status lights; also, they are poorly illuminated.

Asponse Alabama Power Company will develop a program for lamp tcsting the diesel generator status lights before initial criticality.

CATEGORY 2 DISCREPANCIES

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NRC Concern

a. Labeling - Stean, generator indications are labeled A/B/C, while controls are labeled 1/2/3 (level and flow).

- Steam generator level selector switches used for selecting protection

- channel or control channel, do not correlate to level instrumentation.

- SGFP turbine oil temperature (A & B) recorders have Unit I labels.

Labeling on the emergency diesel generator panel is not of the same quality as on the main console.

Response

Alabama Power Company will utilize consistent labeling for steam generator indication / controls.

The selector switches used for selecting protection or control channels

• will be relabeled to correlate to the level instrumentation. The SGFP turbine oil temperature recorders will be relabeled as Unit 2 recorders.

The emergency power board wi:1 be relabeled (white background with black lettering). The above labeling will be completed before fuel load.

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l NRC Concern -

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b. Selector Switches - resolved with NRC.

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NRC Concern

c. Illumination - Panel illumination levels are often belcw the minimum acceptable standard for readability (30 footcandles).

Response

A lighting survey of the Unit 2 control room was conducted by Southern Company Services' Electrical Design Department. The results of the main control room survey are as follows:

1. Main Control Board - Vertical Section Average lighting - 39.21 footcandles

• Lowest lighting - 25.1 footcandles Highest lighting - 50.5 footcandles

• arec where fluorescent lamp is not illuminated

2. Main Control Baord - Horizontel Section Average lighting - 63.14 footcandles Lowest ligitting - 49.3 footcandles Highest lighting - 80.8 footcandles

3. Main Control Room Floor Average lighting - 74.5 footcandles Lowest lighting - 62.3 footcandles Highest lighting - 91.0 footcandles

4. Main Control Room Working Area Average lighting - 98.16 footcandles Lowest lighting - 75.0 footcandles Highest lighting - 131.0 footcandles

5. Main Control Room Back Panels 1

Lighting at eye level was greater than 30 footcandles, i

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6. There is no glare on the main control room meters. Alabama Power Company will ensure before fuel load there is 30 footcandles in the l area where the lighting was below the NRC recommended level. The l following will be cc:npleted prior to fuel load to enhance the main control room lighting,

a. Tile the main control room floor.

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b. Remove the fence dividing the Unit 1 control room from the Unit 2 control room.

, c. Replace tarnished ceiling panels. ,

d. Perfonn another lighting survey to verify that the main control  :

control room lighting is greater than 30 footcandles.  ;

I NRC Concern

d. Scale Indications - The intermediate and major interval marks are not i distinct enough from the basic unit markings.

Response

Scale indications utilized at Farley Nuclear Plant are industry standards.

The addition of normal, alert and alarm ranges for significant meters will enhance the operator's ability to detemine meter indications.

Alabama Power Company will consider Male indications in the long term

[- main control room review.

I NRC Concern

e. Color Coding - There are too many colors used for system discrimination (23); they lack distinction.

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- train colors on emergency ciesel panel should be red and blue; connon i bus should be black.

Response

Alabama Power Company will review the colors used for system discrimination.

The number of colors will be reduced and system discrimination will be

-more distinctive. The revised system discrimination colors will be implemented before exceeding 5% power.

The Emergency Power Board mimic panel will be modified before exceeding 5% powter so that Unit 1 and Unit 2 Train A is red and Unit I and Unit 2 Train B is blue. Unit 1 and Unit 2 common buses will be black. -

NRC Concern

f. Process Computer - There is no cross indexing of data ^

points addresses or location infomation.

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- glare on CRT interferes with viewing.

' Response

.-- Alabama Power Company will add a hood to the CRT located on the main control board reactor panel to reduce the glare and provide a cross index of data point addresses before fuel load.

NRC Concern

g. Controls - Governor speed and voltage adjustment controls are reversed from convention, increase should be to the right (diesel generator).

Response  ;

1 Alabama Power Company will label the governor speed and voltage controls  ;

to indicate increase / decrease before fuel load.

I NRC Concern

h. Communication - Voice connunications with MSA facemask is difficult beyond 6 feet.

Response

5 ~~ Before exceeding 5% power, Alabama Power Company will add a voiEe amplifier to the self-contained emergency air breathing devices utilized in the main control room for improved communications.

CATEGORY 3 DISCREPANCIES NRC Concern

a. Switch color plate for the 4160V and 500KV systems are mixed up.

Response

The switch colcr. plates for the 4160V and 500KV systems will be reviewed as a part of Item.2.e (colors used for system discrimination). The revised system discrimination colors will be implemented prior to fuel load. 4 I e NRC Concern

b. Communication - Gaitronic system does not provide for a dedicated channel for control room connunications.

- No sound powered headsets were in the control room.

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Response

Alabama Power Company will provide sound powered headsets in the control room. Administrative procedures will be modified before fuel load to provide a dedicated Gaitronics channel during emergency comunications.

NRC Concern

c. Phone / Headsets - Were not available at back panels for comunication to the main control room area.

Response

Alabama Power Company will provide sound powered headsets at the back panels before fuel load.

NRC Concern

d. Legend Status Lights are not always well grouped, are moderately difficult to read and have faded colors.

Response

l Alabama Power Company will label the matrix utilized to identify the status lights before fuel load. The matrix will help the operator to

[- more quickly identify the individual status lights. e -

NRC Concern

e. Color Coding - There is an inconsistent use of colors throughout the control room

Response

Alabama Power Company will review color coding as a part of Item 2.e (colors used for system discrimination). The revised system discrim-ination colors will be implemented before exceeding 5% power.

NRC Concern

f. Illuminated Displays have intensities which often conflict with their importance and are sometimes difficult to read.

Response .

Alabama Power Company will replace the blue status lens on the EPB and the electrical status lens difficult to read located on the main control board turbine panel with those easier to read before exceeding

-5% power. .

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NRC Concern

g. Lamp Test - Test capability of GEMCO switch lights.

Response

Alabama Power Company will revise the shift turnover procedure before fuel load to include a walkdown of the main control board for verifi-cation that all- bulbs are illuminated.

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NRC Concern

h. Rear' Cabinets - BOP cabinets are older stnck manufacturers components (GE J-handles) and standardization and convention is not maintained at the same level as the main console.

Response

Components located on the BOP are infrequently used by the operator and ' l are not required for immediate operator actions during energencies.

The components located on the main control board are more frequently used by the operator and some of the indications are used during immediate operator actions. Because of the infrequent use during normal operations

~; and not being required for immediate operator actions during emergencies, Alabama Power Company will review the standardization and convention of  ;

the BOP panels in the long term review of the main control room. l

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i NRC Concern

i. Labels - Turbine oil controller and bearing oil meter have different labels for same function.

Response

Alabama Power Company will consistently label the turbine oil controller and bearing oil meter before fuel load.

, NRC Concern J. Control / Display - resolved with NRC.

4 i CATEGORY 4 DISCREPANCIES LNRC Concern-4 a.- Annunciators --Bulb change subjects the CR0 to a shock hazard,

Response

. Alabama' Power Company will provide for annunciator bulb replacement

.without a shock hazard to the operator before fuel load.

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