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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1.0 PURPOSE 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

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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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CHK. D 7P~'-IP QK sRt5~~3 5.2 ELECTRICAL PROPERTIES 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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iKEE Reeozzmended. Practzce Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Geaeratmg Stations and Substadons

1. Scope tery to determine that it meets speci5cations or lnanufactuzer s zatlllgso TMs recommended practice is limited to pro-battery rack. A structure used to support a viding recommended practices of maintenance, test'schedules, and testing pzoceduzes that can group of cells.

. be, used to optimize the life and performance . '.capacity test (IeM storage batteries). A dis'-

of large lead stowage batteries.'tt:also provides charge ot a battery'o a designatkd terminal to determine" when: batteries'should 'uidance voltage.

be replaced. There are other test proceduze4 perfozmalmm test (Iesd.storage battezies). A and replacement techniques used. within the constant current capacity test made on a bat-industry (especiaQy. for smaller..subchhion bat-

'eries) which are equally as-effective-but~ be- tery, as found, after being in service, to detect any change in.thecaplcity determined by. the yond the scope of this recommended practice.

acceptance test.

Shhg, installation, quali5cation, other bat-tery types, and application are also beyond the service test (lead storage battezies). A special scope of this recommended practice. test of the battery's ability to satisfy'he de-This recommended practice does not include sign requirements (battery duty cycle) of the any other component of the dc system nor sur-  :, dc system.

veillance and testing of the dc system, even tezmillal connection detail (lead storage bat-though the battezy is part of that system.

teries). Connections made between rows of Pzeoperational and periodic dc system tests of cells or at the positive and negative terminals chazgezs and other dc components may require of the battery, which may include lead-plated that the battery be connected to the system. terminal phtes, cables with lead-plated lugs, Details for these tests will depend on the re- and lead-phted rigid copper connectors.

quirements,,"of the dc system and are not within the scope of this recommended practice.

3. References

2. Definitions f1) ANSI/IEEE Std 100-1977, Standard Dic-tionary of Electrical and Electronics Terms The following de5nitions apply speci5cally to the subject matter of this recommended f2] ANSI/IREE Std 484-1975, Recommended practice. For other de5nitions see Section 3, Practice for Installation Design and Installation References. of Large Lead Storage Batteries for Generating Stations and Substations acceptance test (lead storage batteries). A con-stant current capacity test made on a new bat- f3] ANSI/IEEE Std 494-1974, Standard Meth-

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.g . DATE~EZZ DATE SttI 460.1 IEEE RZCOMMEN PRACTICE FOR MAINTENANCETESTING s od for Identification of Documents Related to 42.3 Precautions, The following protective Qaa 1E Equipment and Systems for Nuclear proceduzes should be observed during mai Power Genenxting Stations ten ance:

[4] IREE Std 308-1980, Standard Criteria for (1) Insulate the handles of tools used f Class 1E Power Systems for Nuclear Power tightesdng connector bolts .

Generating Stations (2) Prohibit arcing, smoking, and an op Game in the immediate vicinity of the battei

[5] IEEE Std 323-1974,'Standard for Qualify- (3) Ensure that the test leads are connect ing Class 1E Equipment for Nuclear Power with sufficient length of cable to prevent .

Generating Stations cidental arcing in the vicinity of the battery.

connections to toad test estuipme

[6] IEEE Std 380-1975, De5nitions of Terms Used in IEEE.Nuclear Power Generating Sta- should include shoztwircuit protection.

tion Standards (6) Ensure that battery area ventilatit is operable.

[7] ANSI/IEEE Std 485-1978, Recommended (6) Ensure unobstructed egress from t Practice for Sizing Large Lead Storage Batteries battery area.

for Generating Stations and Substations 4.3 Inspections. All inspections should be ma

[8] IEEE Std 536-1979, Standaxd for Quali- under normal float conditions. SpeciQc gravi Qcation of Class 1E Lead Stozage Batteries for readings are not accurate during charge or ft Nuclear Power Genezating Stations lowing the addition of water. Readings shov be taken in accordance with the manufacture instructions. Refer to the Appendixes for mc

4. Maintenance .' . information.

~ 4%1 GtmkxaL Inirp'ection of the battery or 4.1 GeaeraL Pmper maintenance will prolong regularly scheduled basis (at least once g the life of a bat4ey.and:will. aid.-.hL.assuring month) should include a check and record that it, is capable of satisfying.its. design ze- the following:

quizementLs.A"good battery.maintexumce pm- (1) Genezal appeanmce and cleanliness of t gram will;serve as a valuab1e aid.inxtetennining battexy and battery area the need for battery replacement; Station bat (2) Charger output cuzrent and voltage tezy maintenance should be performed by per- (3) Kectmlyte levels sonnel knowledgeable of batteries and the safe- (4)Cracks in cells or leakage of elect ty precautions involved. lyte (6) Any evidence of corrosion at eith 4e2 Safety. The safety precautions listed here- tezminals or connectors in should be followed in station battery main- (6) Ambient temperature and condition tenance. VFozk performed on batteries should ventilation equipment be done only with the proper and safe tools (7) Pilo~ll (if used) voltage, specific and with the pmtective equipmeat listed. and electrolyte temperature gr'ty, 42c1 MethodL Work pezfonaed on a battery 4.3e2 Quarterly. At least once per quarter in service shouM use methods to prelude cir- general inspection should be augmented cuit intezzuption or axing in the vicinity of the follows. Check and record:

(1) Speci5c gravity of each cell 444 Pmtecthre Equipment. The following (2) Voltage of each cell and total batte

'pmtective.equipment shouM be available to texminal.voltage personnel.who perform battery maintenance (3) Temperature of electrolyte in represen work: tive cells. (Suggestion: take the temperature (1) Goggies celh number 6, 12, 18,...)

Acidmsistant gloves 48.3 Yearly. At least once each year

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(3) Protective aprons quarterly. inspection should be augmented Portable or stationary water facilities for

'4) follows. Check and record:

rinsing eyes and skin in case of acid spillage (1) Cell condition (this would involve a c (5) Bicarbonate of soda or other suitable tailed visual inspection of each cell in contr; neutralizihg agent recommended by the manu- to the general inspection in 4.3.1.) Revit facturer for acid spillage manufacturer's recommendations.)

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float voltage or to 6.10 CL ING DO'S AND DON'TS

.04 volts be ow mini b low eptable a voltage In Table ll. Wipe the outside of the cells as necessary with a minimum accep the water-moistened cloth to remove dust and ordinary dirt. If electrolyte is spilled on the covers, neutralize it SERVICE RIES FOR PHOTOVOLTAIC with a cloth moistened with a solution of baking soda 6.6 BATTERI service have a less or photovoltaic and water mixed in the proportion of one pound af Batteries for p discharge/recharge regime and as such soda to one gallon of water. When fizzing stops as eflned after the average full ch, fresh soda solution is applied, wipe with a water-ust be observed

't 'etermined that a cell(s) have falle ate. If it is e e moistened cloth to remove all traces of soda.

vvolts below normal float Never use solvents, detergents or other cleaning more than 0.04 .

additional solar panels or red necessary to add compounds or oils, waxes or polishes on the plastic Check the solar panel fof he load demand ibie maif containers or covers since such materials may attack the plastic and cause it to craze or crack. Always keep I . Equalize charge from auxiliary equipm t the connectors and posts corrosion-free and coated od solution if the equipment i with NO.OX.ID grease or corrosion resistant oil. The Charge a the highestequaljze potential fo able. Chargeat covers and containers should be clean and dry at all in Table II. times.

BATTERIES 6.1 ENGINE STARTING C&D is presently supplying some stationary bat-n C&D stationary batteries (MHCSD, t . teries encased in clear polycarbonate plastic con-used in engine cranking power fo tainers which can be identified by their appearance.

aree use i powere d generators The frequency of such discharg (Their color is generally water-white, although when es and the depth is unpredictable, but the service viewed from an angle they have a bluish tint.) They must be regarded as heavy cycle service. As such are extremely acid resistant, free from internal cell(s) will become out of line with normal float stresses and h resistan potential. The solution is to provide equalize charge CAUTION at the highest practical potential shown in Tables I CLEANING POLYCARBONATE JARS and II. ~ .,Clean or wash the polycarbonate containers.

6.6 RECHARGE. FOL'LOWING EMERGENCY with clear water only.

DISCHARGE Neutralize acid spills with a solution of Batteries left in the discharged state for periods sodium bicarbonate (baking soda). Never of time may sulfate, or in the case of severe discharge, use ammonia, soda ash, sodium hydroxide hydrate which is a state of complete failure. Hydra- or any strong alkalies. Ifalkalies are inadver-tion will be discussed in Section 10.5. tently spilled on the containers, they should Both lead-antimony and lead-calcium batteries be immediately washed off with water.

should be recharged as quickly as practical following 6.1 an emergency discharge. Where conditions permit, this can be done by raising the bus voltage to the NOTE: Many protective coatings designed to maximum allowed by the other circuit components inhibit corrosion of connecting terminals con-but not to exceed the values listed in Tables I and II. tain chlorinated solvents which may be harmful If charging at equalize voltage is impractical, re- to the battery and particularly to the cover and charge at float voltage. plastic container for the cells. C&D Batteries recommends the exclusive use of NO.OX-ID grease or special corrosion resistant oil sup-6.9 WATER ADDITIONS plied for the battery by C&D Batteries and In addition to normal evaporation, as batteries available upon order for subsequent scheduled are floated and charged, a small quantity of the maintenance.

water in the electrolyte Is broken down into hydrogen Maintenance of connections is one of the most and oxygen by the charging current. These gases important tasks for which the user is responsible. A are dissipated through the flame arrestor. As this loose or corroded connection can often develop a takes place, the electrolyte level gradually drops so high resistance circuit. If a high current, load is that from time to time it'is necessary to replace this suddenly required from the battery an extremely loss with water. Keep the electrolyte level between targe amount of power can be dissipated at the the high and low level lines by adding approved or connection, often leading to a melt-down of the post distilled.water as required. Refer to Section 4.9: and possible ignition of the cover of the cell or other "Adjusting Electrolyte Level and Watering of Bat- neighboring parts. Only you the user can inspect tery" to better understand the rate of water loss and and maintain connection integrity. It is recommend-the quality of water which must be used for water ed that all electrical connections associated with additionL the battery be inspected routinely at least four Along with cell voltage, specific gravity records times yearly and retorqued as required to the torque must include the amount and date of water additionL 'v n in Table I of Section 4.6 titled "Subse-SHT I DL '~P'A>~

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P.O. Box 101 New Hilli NC Attn! Nr I. Gofl in Sub)ect: 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-. ~,-

yf If you I

have-any questionsc call me at your convienence.

Very truly yours>

Graham Walker Nanager Applications Engineer

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