ML18019B046

Rev 1 to Analysis for Location of Battery RM SA & SB Eyewash Station & Shower

ML18019B046
Person / Time
Site:	Harris
Issue date:	06/13/1986
From:	Petizizzo M CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML18019B044	List: ML18019B043 ML18019B045 ML18019B046
References
E-5504, E-5504-R01, E-5504-R1, NUDOCS 8606240364
Download: ML18019B046 (19)

Text

Carolina Power

& Light Company P. 0.

Box 1551 Raleigh, North Carolina 27602 ANALYSIS FOR

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EY<WASH SVARod ~ Q ~go~ ~g Shearon Harris Nuclear Power Plant Unit 1 Safety Classification:

Se ism'ic Class ification:

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Rev. No.

'" "'.'Date Verified by/

Prin. or Res.

Eng./

Date Date Pa es Affected P, sQiQ~i) Pg

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t g g 860b240364 860618 PDR ADOCK 05000400 A

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1.0 PURPOSE GHK.

DATF~~

To provide a supported analysis which assures that any water spray from the battery room eye wash station and shower will not adversely affect the emergency dc electrical system operation.

2.0 SCOPE Battery Rooms SA and SB.

3.0 CONCLUSION

S The battery room eye wash station and shower for rooms SA and SB are acceptable as installed.

4.0 PREMISES 4.1 The battery room eye~y~sh station and shower are necessary for personnel protection 4.2 The shower and eye wash station must be easily accessible since it is postulated that the injured person may not be able to see.

4.3 Since there are no concave surfaces on the battery, the possibility of water pooling is minimal.

4.4 The most likely situation for which the eye wash station or the shower will be necessary, is when a cell is being repaired,

replaced, or relocated.

4.5 Accessibility to the battery room is controlled by the control roome 4.6 A water spray will not adversely affect the mechanical properties of the battery polycarbonate cell casing.

4.7 There is no precedence for establishing an acceptable spatial separation between the battery shower and the battery since a dc electrical system failure due to the utilization of the safety shower has not been 'defined as a common failure.

5.0 ANALYSIS 5.1, MECHANICAL PROPERTIES Since- $),is r'ecommended to wash the battery cell 'containers with clear water and since only clear water is available at the eye wash station and shower, the mechanical properties of the battery cells are not

)eopardized by any inadvertent water spray.

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5.2 ELECTRICAL PROPERTIES SHT ~

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QK sRt5~~3 The Class 1E dc electrical system is an ungrounded system; therefore, a

continuous path between positive and negative connections would be required to cause any electrical fault.

Since the possibility of water pooling is minimal (See 4.3),

and since the lugs are slightly elevated above the cell surface, an electrical failure due to water pooling is not considered feasible.

Also, the most likely necessity for the eye wash or shower would be if a cell is being replaced,

repaired, or relocated.

During this type of modification or enhancement, the battery is disconnected from the system.

5.3 STRUCTURAL PROPERTIES The structural properties of the battery will not be affected by water.

6.0 RESULTS Any inadvertant water spray from the battery room eye wash station/shower will have no adverse affect on the Class IE dc electrical system.

7.0 REFERENCES

(1)

IEEE Std 450-1980 Recommended Practice for Maintenance,

Testing, and Replacement of Large Lead Storage Batteries for Generating Stations, Substations.

(2)

C

& D Stationary Battery Installation and Operation Instruction, Publication 12-800, 1981.

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IREE Recommended.

Practice Maintqgeixce, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Subs

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SHT~OF ~S BY.

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a/j)ac iKEE Reeozzmended.

Practzce Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Geaeratmg Stations and Substadons

1. Scope TMs recommended practice is limited to pro-viding recommended practices of maintenance, test'schedules, and testing pzoceduzes that can

. be, used to optimize the life and performance of large lead stowage batteries.'tt:also provides

'uidance to determine" when: batteries'should be replaced. There are other test proceduze4 and replacement techniques used. within the industry (especiaQy. for smaller..subchhion bat-

'eries) which are equally as-effective-but~ be-yond the scope ofthis recommended practice.

Shhg, installation, quali5cation, other bat-tery types, and application are also beyond the scope ofthis recommended practice.

This recommended practice does not include any other component of the dc system nor sur-veillance and testing of the dc system, even though the battezy is part of that system.

Pzeoperational and periodic dc system tests of chazgezs and other dc components may require that the battery be connected to the system.

Details for these tests will depend on the re-quirements,,"of the dc system and are not within the scope ofthis recommended practice.

2. Definitions The following de5nitions apply speci5cally to the subject matter of this recommended practice. For other de5nitions see Section 3, References.

acceptance test (lead storage batteries). A con-stant current capacity test made on a new bat-tery to determine that it meets speci5cations or lnanufactuzer s zatlllgso battery rack. A structure used to support a

group of cells.

'.capacity test (IeM storage batteries).

A dis'-

charge ot a battery'o a designatkd terminal voltage.

perfozmalmm test (Iesd.storage battezies).

A constant current capacity test made on a bat-tery, as found, after being in service, to detect any change in.thecaplcity determined by. the acceptance test.

service test (lead storage battezies). A special test of the battery's ability to satisfy'he de-sign requirements (battery duty cycle) of the

, dc system.

tezmillal connection detail (lead storage bat-teries).

Connections made between rows of cells or at the positive and negative terminals of the battery, which may include lead-plated terminal phtes, cables with lead-plated

lugs, and lead-phted rigid copper connectors.

3. References f1) ANSI/IEEE Std 100-1977, Standard Dic-tionary of Electrical and Electronics Terms f2] ANSI/IREE Std 484-1975, Recommended Practice for Installation Design and Installation of Large Lead Storage Batteries for Generating Stations and Substations f3] ANSI/IEEE Std 494-1974, Standard Meth-

.g DATE~EZZ DATE SttI 460.1

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IEEE RZCOMMEN PRACTICE FOR MAINTENANCETESTING s

od for Identification of Documents Related to Qaa 1E Equipment and Systems for Nuclear Power Genenxting Stations

[4] IREE Std 308-1980, Standard Criteria for Class 1E Power Systems for Nuclear Power Generating Stations

[5] IEEE Std 323-1974,'Standard for Qualify-ing Class 1E Equipment for Nuclear Power Generating Stations

[6] IEEE Std 380-1975, De5nitions of Terms Used in IEEE.Nuclear Power Generating Sta-tion Standards

[7] ANSI/IEEE Std 485-1978, Recommended Practice for Sizing Large Lead Storage Batteries for Generating Stations and Substations

[8] IEEE Std 536-1979, Standaxd for Quali-Qcation of Class 1E Lead Stozage Batteries for Nuclear Power Genezating Stations

4. Maintenance 4.1 GeaeraL Pmper maintenance will prolong the life of a bat4ey.and:will. aid.-.hL.assuring that it, is capable of satisfying.its. design ze-quizementLs.A"good battery.maintexumce pm-gram will;serve as a valuab1e aid.inxtetennining the need for battery replacement; Station bat tezy maintenance should be performed by per-sonnel knowledgeable ofbatteries and the safe-ty precautions involved.

4e2 Safety. The safety precautions listed here-in should be followed in station battery main-tenance.

VFozk performed on batteries should be done only with the proper and safe tools and with the pmtective equipmeat listed.

42c1 MethodL Work pezfonaed on a battery in service shouM use methods to prelude cir-cuit intezzuption or axing in the vicinityof the 444 Pmtecthre Equipment. The following

'pmtective.equipment shouM be available to personnel.who perform battery maintenance work:

(1) Goggies

.'2)

Acidmsistant gloves

~

(3) Protective aprons

'4)

Portable or stationary water facilities for rinsing eyes and skin in case of acid spillage (5) Bicarbonate of soda or other suitable neutralizihg agent recommended by the manu-facturer for acid spillage 42.3 Precautions, The followingprotective proceduzes should be observed during mai ten ance:

(1) Insulate the handles of tools used f tightesdng connector bolts (2) Prohibit arcing, smoking, and an op Game in the immediate vicinity of the battei (3) Ensure that the test leads are connect with sufficient length of cable to prevent cidental arcing in the vicinityof the battery.

connections to toad test estuipme should include shoztwircuit protection.

(6) Ensure that battery area ventilatit is operable.

(6) Ensure unobstructed egress from t battery area.

4.3 Inspections. Allinspections should be ma under normal float conditions. SpeciQc gravi readings are not accurate during charge or ft lowing the addition of water. Readings shov be taken in accordance with the manufacture instructions. Refer to the Appendixes for mc

. information.

~

4%1 GtmkxaL Inirp'ection of the battery or regularly scheduled basis (at least once g

month) should include a check and record the following:

(1) Genezal appeanmce and cleanliness oft battexy and battery area (2) Charger output cuzrent and voltage (3) Kectmlyte levels (4)Cracks in cells or leakage of elect lyte (6) Any evidence of corrosion at eith tezminals or connectors (6) Ambient temperature and condition ventilation equipment (7) Pilo~ll (if used) voltage, specific gr'ty, and electrolyte temperature 4.3e2 Quarterly. At least once per quarter general inspection should be augmented follows. Check and record:

(1) Speci5c gravity of each cell (2) Voltage of each cell and total batte texminal.voltage (3) Temperature of electrolyte in represen tive cells. (Suggestion: take the temperature celh number 6, 12, 18,...)

48.3 Yearly. At least once each year quarterly. inspection should be augmented follows. Check and record:

(1) Cell condition (this would involve a c

tailed visual inspection of each cell in contr; to the general inspection in 4.3.1.)

Revit manufacturer's recommendations.)

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b low mini float voltage or to eptable voltage In Table ll.

.04 volts be ow the minimum accep a RIES FOR PHOTOVOLTAICSERVICE 6.6 BATTERI Batteries or p for photovoltaic service have a less eflned discharge/recharge regime and as such ust be observed after the average full ch,

't 'etermined that a cell(s) have falle 0.04 volts below normal float ate. If it is e e more than v

necessary to add additional solar panels or red he load demand Check the solar panel fof ibie maif I

. Equalize charge from auxiliary equipm t

od solution if the equipment i

able. Charge a Chargeat the highestequaljze potential fo in Table II.

6.1 ENGINE STARTING BATTERIES n C&Dstationary batteries (MHCSD, t

are use i

e used in engine cranking power fo powere d generators The frequency of such discharg es and the depth is unpredictable, but the service must be regarded as heavy cycle service. As such cell(s) will become out of line with normal float potential. The solution is to provide equalize charge at the highest practical potential shown in Tables I

and II.

6.6 RECHARGE. FOL'LOWING EMERGENCY DISCHARGE Batteries left in the discharged state forperiods of time may sulfate, or in the case of severe discharge, hydrate which is a state of complete failure. Hydra-tion willbe discussed in Section 10.5.

Both lead-antimony and lead-calcium batteries should be recharged as quicklyas practical following an emergency discharge. Where conditions permit, this can be done by raising the bus voltage to the maximum allowed by the other circuit components but not to exceed the values listed in Tables I and II.

If charging at equalize voltage is impractical, re-charge at float voltage.

6.9 WATER ADDITIONS In addition to normal evaporation, as batteries are floated and charged, a small quantity of the water in the electrolyte Is broken down into hydrogen and oxygen by the charging current. These gases are dissipated through the flame arrestor. As this takes place, the electrolyte level gradually drops so that from time to time it'is necessary to replace this loss with water. Keep the electrolyte level between the high and low level lines by adding approved or distilled.water as required. Refer to Section 4.9:

"Adjusting Electrolyte Level and Watering of Bat-tery" to better understand the rate ofwater loss and the quality of water which must be used for water additionL Along with cell voltage, specific gravity records must include the amount and date ofwater additionL 6.10 CL ING DO'S AND DON'TS Wipe the outside of the cells as necessary with a water-moistened cloth to remove dust and ordinary dirt. Ifelectrolyte is spilled on the covers, neutralize it with a cloth moistened with a solution of baking soda and water mixed in the proportion of one pound af soda to one gallon of water. When fizzing stops as fresh soda solution is applied, wipe with a water-moistened cloth to remove all traces of soda.

Never use solvents, detergents or other cleaning compounds or oils, waxes or polishes on the plastic containers or covers since such materials may attack the plastic and cause itto craze or crack. Always keep the connectors and posts corrosion-free and coated with NO.OX.ID grease or corrosion resistant oil. The covers and containers should be clean and dry at all times.

C&D is presently supplying some stationary bat-teries encased in clear polycarbonate plastic con-tainers which can be identified by their appearance.

(Their color is generally water-white, although when viewed from an angle they have a bluish tint.) They are extremely acid resistant, free from internal stresses and h resistan CAUTION CLEANING POLYCARBONATE JARS

~.,Clean orwash the polycarbonate containers.

with clear water only.

Neutralize acid spills with a solution of sodium bicarbonate (baking soda). Never use ammonia, soda ash, sodium hydroxide orany strong alkalies. Ifalkalies are inadver-tently spilled on the containers, they should be immediately washed off with water.

6.1 NOTE: Many protective coatings designed to inhibit corrosion of connecting terminals con-tain chlorinated solvents which may be harmful to the battery and particularly to the cover and plastic container for the cells. C&D Batteries recommends the exclusive use of NO.OX-ID grease or special corrosion resistant oil sup-plied for the battery by C&D Batteries and available upon order forsubsequent scheduled maintenance.

Maintenance of connections is one of the most important tasks for which the user is responsible. A loose or corroded connection can often develop a high resistance circuit. If a high current, load is suddenly required from the battery an extremely targe amount of power can be dissipated at the connection, often leading to a melt-down of the post and possible ignition of the cover of the cell or other neighboring parts. Only you the user can inspect and maintain connection integrity. It is recommend-ed that all electrical connections associated with the battery be inspected routinely at least four times yearly and retorqued as required to the torque

'v n in Table I of Section 4.6 titled "Subse-SHT I

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~une 12, 1986 Carolina Pover 8 Fight Co-Shearon Harris Generating Station P.O.

Box 101 New Hilli NC Attn! Nr I. Goflin GH>

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9 June 86 Telecommunicationsi M. Petrizzo/Q.

Nalker vater sprays effect on battery performance P i0 ~

No.

NY-435065 Gentlemen>

On 9 Jun 86> Nr. Petrizzo and I discussed the possible effect vater spray from a nearby acid rinse station (for personnel protection against skin and eye damage due ho battery electrolyte) might haveKon battery performance.

Xn confirming that battery performance ia not impactedr the X'olIoving conditions are assumed:

l-The dust caps supplied vith the flame arrestor vents are in place.

This precaution guards against contaeinants (i.'e. copperi iront organics) entering cell(s) and affecting performance and/or life.

This precaution is moot howevers Lf the vater supply is the saae

.as that used for topping up the battery.

2.

The cell(s) and battery rack(s) are dried (vith proper personnel protection procedures observed) immediately after the occurence.

You'l need to do this to avoid battery-to-ground current paths from developing - vhich ~cans you may have to replace several of the styrofoam cell spacers-Since the batteries are safety relatedd recommend you substantiate that long tera vatec erposure under the battery rack base (possibly inaccessable,.to hand drying techniques) vill not compromise the rack anchorages-.

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If you have-any questionsc call me at your convienence.

Very truly yours>

Graham Walker Nanager Applications Engineer

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