Information Notice 2002-07, Use of Sodium Hypochlorite for Cleaning Diesel Fuel Oil Supply Tanks: Difference between revisions
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
||
(5 intermediate revisions by the same user not shown) | |||
Line 3: | Line 3: | ||
| issue date = 01/28/2002 | | issue date = 01/28/2002 | ||
| title = Use of Sodium Hypochlorite for Cleaning Diesel Fuel Oil Supply Tanks | | title = Use of Sodium Hypochlorite for Cleaning Diesel Fuel Oil Supply Tanks | ||
| author name = Beckner W | | author name = Beckner W | ||
| author affiliation = NRC/NRR/DRIP/RORP | | author affiliation = NRC/NRR/DRIP/RORP | ||
| addressee name = | | addressee name = | ||
Line 14: | Line 14: | ||
| document type = NRC Information Notice | | document type = NRC Information Notice | ||
| page count = 6 | | page count = 6 | ||
}} | }} | ||
{{#Wiki_filter:}} | {{#Wiki_filter:UNITED STATES | ||
NUCLEAR REGULATORY COMMISSION | |||
OFFICE OF NUCLEAR REACTOR REGULATION | |||
WASHINGTON, D.C. 20555-0001 January 28, 2002 NRC INFORMATION NOTICE 2002-07: USE OF SODIUM HYPOCHLORITE FOR | |||
CLEANING DIESEL FUEL OIL SUPPLY TANKS | |||
==Addressees== | |||
All holders of operating licenses for nuclear power except those who have ceased operations | |||
and have certified that fuel has been permanently removed from the reactor vessel. | |||
==Purpose== | |||
The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice (IN) to alert | |||
addressees to the potential problems related to the use of sodium hypochlorite solutions for | |||
cleaning diesel fuel oil supply tanks. Use of this chemical in higher concentrations can cause | |||
the release of significant amounts of chlorine gas. The NRC anticipates that recipients will | |||
review the information for applicability to their facilities and consider taking appropriate actions. | |||
However, suggestions contained in this IN do not constitute NRC requirements; therefore, no | |||
specific action or written response is required. | |||
Background | |||
Nuclear plants are required to design and maintain an onsite electric power system in | |||
accordance with Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel | |||
Reprocessing Plants, to Part 50 of Title 10 of the Code of Federal Regulations (10 CFR | |||
Part 50). One acceptable method for complying with these regulations for fuel oil systems for | |||
standby diesel generators is described in Regulatory Guide 1.137, Fuel Oil Systems for | |||
Standby Diesel Generators. | |||
Position 2.f of Regulatory Guide 1.137 recommends that licensees clean fuel oil supply tanks at | |||
least every 10 years and that they use sodium hypochlorite solutions or equivalent rather than | |||
soap or detergents to avoid introducing surfactants (surface active agents) into the fuel system. | |||
However, the use of sodium hypochlorite in higher concentrations can release appreciable | |||
amounts of heat and chlorine gas. | |||
Discussion | |||
Sodium hypochlorite is generally available in two forms: as a commercial solution containing | |||
12 to 15 trade percent available chlorine (a so-called bleaching solution), and as a household | |||
solution containing 5 trade percent chlorine. Trade percent is defined as the amount of | |||
chlorine, in grams, that is available for each 100 milliliters of sodium hypochlorite solution. | |||
Sodium hypochlorite is a strong oxidizer and, when mixed with organic materials such as diesel | |||
fuel oil, undergoes an exothermic reaction that generates heat and releases chlorine gas, sometimes violently. A solution with a concentration of 12 trade percent available chlorine can | |||
produce up to 1 pound of chlorine gas for each gallon of solution that reacts. Since fuel oil | |||
supply tanks are usually located underground and cleaning them may involve working in a | |||
confined space, this release could be harmful to the cleaning personnel. Licensees should take | |||
appropriate precautions to protect personnel. | |||
Regulatory Guide 1.137 states that solutions equivalent to sodium hypochlorite can be used to | |||
clean fuel oil supply tanks. The intent is to keep surfactants from soap or detergents out of the | |||
tank. Therefore, to prevent personnel injury, other materials with cleaning properties equivalent | |||
to sodium hypochlorite can be used to clean fuel oil supply tanks, provided they meet the intent | |||
of the recommendation. | |||
The technical specifications of some licensees may include the requirement to use sodium | |||
hypochlorite to clean the fuel oil supply tanks. This requirement came from Revision 4 of the | |||
Westinghouse standard technical specifications, but has been removed in subsequent | |||
revisions. Therefore, any licensee with this requirement has an opportunity to remove it by | |||
submitting a license amendment request. Alternatively, when a licensee converts to the | |||
improved technical specifications, the cleaning requirement is moved, along with the other fuel | |||
oil requirements, to a fuel oil program. Any licensee that has the requirement in a fuel oil | |||
program can change it under 10 CFR 50.59. | |||
This information notice requires no specific action or written response. If you have any | |||
questions about the information in this notice, please contact one of the technical contacts | |||
listed below or the appropriate Office of Nuclear Reactor Regulation (NRR) project manager. | |||
/RA/ | |||
William D. Beckner, Program Director | |||
Operating Reactor Improvements Program | |||
Division of Regulatory Improvement Programs | |||
Office of Nuclear Reactor Regulation | |||
Technical contacts: Krzysztof Parczewski, NRR M. Scott Freeman, RII | |||
301-415-2705 864-822-6927 E-mail: kip@nrc.gov E-mail: msf1@nrc.gov | |||
Attachment: List of Recently Issued Information Notices Sodium hypochlorite is a strong oxidizer and, when mixed with organic materials such as diesel | |||
fuel oil, undergoes an exothermic reaction that generates heat and releases chlorine gas, sometimes violently. A solution with a concentration of 12 trade percent available chlorine can | |||
produce up to 1 pound of chlorine gas for each gallon of solution that reacts. Since fuel oil | |||
supply tanks are usually located underground and cleaning them may involve working in a | |||
confined space, this release could be harmful to the cleaning personnel. Licensees should take | |||
appropriate precautions to protect personnel. | |||
Regulatory Guide 1.137 states that solutions equivalent to sodium hypochlorite can be used to | |||
clean fuel oil supply tanks. The intent is to keep surfactants from soap or detergents out of the | |||
tank. Therefore, to prevent personnel injury, other materials with cleaning properties equivalent | |||
to sodium hypochlorite can be used to clean fuel oil supply tanks, provided they meet the intent | |||
of the recommendation. | |||
The technical specifications of some licensees may include the requirement to use sodium | |||
hypochlorite to clean the fuel oil supply tanks. This requirement came from Revision 4 of the | |||
Westinghouse standard technical specifications, but has been removed in subsequent | |||
revisions. Therefore, any licensee with this requirement has an opportunity to remove it by | |||
submitting a license amendment request. Alternatively, when a licensee converts to the | |||
improved technical specifications, the cleaning requirement is moved, along with the other fuel | |||
oil requirements, to a fuel oil program. Any licensee that has the requirement in a fuel oil | |||
program can change it under 10 CFR 50.59. | |||
This information notice requires no specific action or written response. If you have any | |||
questions about the information in this notice, please contact one of the technical contacts | |||
listed below or the appropriate Office of Nuclear Reactor Regulation (NRR) project manager. | |||
/RA/ | |||
William D. Beckner, Program Director | |||
Operating Reactor Improvements Program | |||
Division of Regulatory Improvement Programs | |||
Office of Nuclear Reactor Regulation | |||
Technical contacts: Krzysztof Parczewski, NRR M. Scott Freeman, RII | |||
301-415-2705 864-822-6927 E-mail: kip@nrc.gov E-mail: msf1@nrc.gov | |||
Attachment: List of Recently Issued Information Notices | |||
Distribution: | |||
PUBLIC | |||
===IN Reading File=== | |||
ADAMS ACCESSION NO.: ML013450182 OFFICE PM:RORP:DRIP Tech Editor EMCB EMBC | |||
NAME OTYazi* OTYazi/for* KParczewski* LALund* | |||
DATE 01/25/02 01/25/02 01/25/02 01/25/02 OFFICE C:EMCB IQMB SC:REXB PD:RORP:DRIP | |||
NAME WHBateman* GCCwalina* TKoshy* WDBeckner* | |||
DATE 01/25/02 01/25/02 01/25/02 01/28/02 OFFICIAL RECORD COPY | |||
Attachment 1 LIST OF RECENTLY ISSUED | |||
NRC INFORMATION NOTICES | |||
_____________________________________________________________________________________ | |||
Information Date of | |||
Notice No. Subject Issuance Issued to | |||
_____________________________________________________________________________________ | |||
2002-06 Design Vulnerability in BWR 01/18/2002 All holders of operating licenses | |||
Reactor Vessel Level or construction permits for boiling | |||
Instrumentation Backfill water reactors (BWRs). | |||
Modification | |||
2002-05 Foreign Material in Standby 01/17/2002 All holders of licenses for nuclear | |||
Liquid Control Storage Tanks power reactors. | |||
2002-04 Wire Degradation at Breaker 01/10/2002 All holders of operating licenses | |||
Cubicle Door Hinges for nuclear power reactors. | |||
2002-03 Highly Radioactive Particle 01/10/2002 All holders of operating licenses | |||
Control Problems During Spent for nuclear power reactors, Fuel Pool Cleanout holders of licenses for | |||
permanently shutdown facilities | |||
with fuel onsite, and holders of | |||
licenses for non-power reactors. | |||
2002-02 Recent Experience with 01/08/2002 All holders of operating licenses | |||
Plugged Steam Generator for pressurized-water reactors | |||
Tubes (PWRs), except those who have | |||
permanently ceased operations | |||
and have certified that fuel has | |||
been permanently removed from | |||
the reactor. | |||
2002-01 Metalclad Switchgear Failures 01/08/2002 All holders of licenses for nuclear | |||
and Consequent Losses of power reactors. | |||
Offsite Power | |||
2001-19 Improper Maintenance and 12/17/2001 All holders of operating licenses | |||
Reassembly of Automatic Oil for nuclear power reactors, Bubblers except those who have | |||
permanently ceased operations | |||
and have certified that fuel has | |||
been permanently removed from | |||
the reactor vessel. | |||
______________________________________________________________________________________ | |||
OL = Operating License | |||
CP = Construction Permit}} | |||
{{Information notice-Nav}} | {{Information notice-Nav}} |
Latest revision as of 05:35, 24 November 2019
ML013450182 | |
Person / Time | |
---|---|
Issue date: | 01/28/2002 |
From: | Beckner W NRC/NRR/DRIP/RORP |
To: | |
Freeman, S, NRR/DRIP/REXB, 415-1175 | |
References | |
TAC MB3345 IN-02-007 | |
Download: ML013450182 (6) | |
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, D.C. 20555-0001 January 28, 2002 NRC INFORMATION NOTICE 2002-07: USE OF SODIUM HYPOCHLORITE FOR
CLEANING DIESEL FUEL OIL SUPPLY TANKS
Addressees
All holders of operating licenses for nuclear power except those who have ceased operations
and have certified that fuel has been permanently removed from the reactor vessel.
Purpose
The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice (IN) to alert
addressees to the potential problems related to the use of sodium hypochlorite solutions for
cleaning diesel fuel oil supply tanks. Use of this chemical in higher concentrations can cause
the release of significant amounts of chlorine gas. The NRC anticipates that recipients will
review the information for applicability to their facilities and consider taking appropriate actions.
However, suggestions contained in this IN do not constitute NRC requirements; therefore, no
specific action or written response is required.
Background
Nuclear plants are required to design and maintain an onsite electric power system in
accordance with Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel
Reprocessing Plants, to Part 50 of Title 10 of the Code of Federal Regulations (10 CFR
Part 50). One acceptable method for complying with these regulations for fuel oil systems for
standby diesel generators is described in Regulatory Guide 1.137, Fuel Oil Systems for
Standby Diesel Generators.
Position 2.f of Regulatory Guide 1.137 recommends that licensees clean fuel oil supply tanks at
least every 10 years and that they use sodium hypochlorite solutions or equivalent rather than
soap or detergents to avoid introducing surfactants (surface active agents) into the fuel system.
However, the use of sodium hypochlorite in higher concentrations can release appreciable
amounts of heat and chlorine gas.
Discussion
Sodium hypochlorite is generally available in two forms: as a commercial solution containing
12 to 15 trade percent available chlorine (a so-called bleaching solution), and as a household
solution containing 5 trade percent chlorine. Trade percent is defined as the amount of
chlorine, in grams, that is available for each 100 milliliters of sodium hypochlorite solution.
Sodium hypochlorite is a strong oxidizer and, when mixed with organic materials such as diesel
fuel oil, undergoes an exothermic reaction that generates heat and releases chlorine gas, sometimes violently. A solution with a concentration of 12 trade percent available chlorine can
produce up to 1 pound of chlorine gas for each gallon of solution that reacts. Since fuel oil
supply tanks are usually located underground and cleaning them may involve working in a
confined space, this release could be harmful to the cleaning personnel. Licensees should take
appropriate precautions to protect personnel.
Regulatory Guide 1.137 states that solutions equivalent to sodium hypochlorite can be used to
clean fuel oil supply tanks. The intent is to keep surfactants from soap or detergents out of the
tank. Therefore, to prevent personnel injury, other materials with cleaning properties equivalent
to sodium hypochlorite can be used to clean fuel oil supply tanks, provided they meet the intent
of the recommendation.
The technical specifications of some licensees may include the requirement to use sodium
hypochlorite to clean the fuel oil supply tanks. This requirement came from Revision 4 of the
Westinghouse standard technical specifications, but has been removed in subsequent
revisions. Therefore, any licensee with this requirement has an opportunity to remove it by
submitting a license amendment request. Alternatively, when a licensee converts to the
improved technical specifications, the cleaning requirement is moved, along with the other fuel
oil requirements, to a fuel oil program. Any licensee that has the requirement in a fuel oil
program can change it under 10 CFR 50.59.
This information notice requires no specific action or written response. If you have any
questions about the information in this notice, please contact one of the technical contacts
listed below or the appropriate Office of Nuclear Reactor Regulation (NRR) project manager.
/RA/
William D. Beckner, Program Director
Operating Reactor Improvements Program
Division of Regulatory Improvement Programs
Office of Nuclear Reactor Regulation
Technical contacts: Krzysztof Parczewski, NRR M. Scott Freeman, RII
301-415-2705 864-822-6927 E-mail: kip@nrc.gov E-mail: msf1@nrc.gov
Attachment: List of Recently Issued Information Notices Sodium hypochlorite is a strong oxidizer and, when mixed with organic materials such as diesel
fuel oil, undergoes an exothermic reaction that generates heat and releases chlorine gas, sometimes violently. A solution with a concentration of 12 trade percent available chlorine can
produce up to 1 pound of chlorine gas for each gallon of solution that reacts. Since fuel oil
supply tanks are usually located underground and cleaning them may involve working in a
confined space, this release could be harmful to the cleaning personnel. Licensees should take
appropriate precautions to protect personnel.
Regulatory Guide 1.137 states that solutions equivalent to sodium hypochlorite can be used to
clean fuel oil supply tanks. The intent is to keep surfactants from soap or detergents out of the
tank. Therefore, to prevent personnel injury, other materials with cleaning properties equivalent
to sodium hypochlorite can be used to clean fuel oil supply tanks, provided they meet the intent
of the recommendation.
The technical specifications of some licensees may include the requirement to use sodium
hypochlorite to clean the fuel oil supply tanks. This requirement came from Revision 4 of the
Westinghouse standard technical specifications, but has been removed in subsequent
revisions. Therefore, any licensee with this requirement has an opportunity to remove it by
submitting a license amendment request. Alternatively, when a licensee converts to the
improved technical specifications, the cleaning requirement is moved, along with the other fuel
oil requirements, to a fuel oil program. Any licensee that has the requirement in a fuel oil
program can change it under 10 CFR 50.59.
This information notice requires no specific action or written response. If you have any
questions about the information in this notice, please contact one of the technical contacts
listed below or the appropriate Office of Nuclear Reactor Regulation (NRR) project manager.
/RA/
William D. Beckner, Program Director
Operating Reactor Improvements Program
Division of Regulatory Improvement Programs
Office of Nuclear Reactor Regulation
Technical contacts: Krzysztof Parczewski, NRR M. Scott Freeman, RII
301-415-2705 864-822-6927 E-mail: kip@nrc.gov E-mail: msf1@nrc.gov
Attachment: List of Recently Issued Information Notices
Distribution:
PUBLIC
IN Reading File
ADAMS ACCESSION NO.: ML013450182 OFFICE PM:RORP:DRIP Tech Editor EMCB EMBC
NAME OTYazi* OTYazi/for* KParczewski* LALund*
DATE 01/25/02 01/25/02 01/25/02 01/25/02 OFFICE C:EMCB IQMB SC:REXB PD:RORP:DRIP
NAME WHBateman* GCCwalina* TKoshy* WDBeckner*
DATE 01/25/02 01/25/02 01/25/02 01/28/02 OFFICIAL RECORD COPY
Attachment 1 LIST OF RECENTLY ISSUED
NRC INFORMATION NOTICES
_____________________________________________________________________________________
Information Date of
Notice No. Subject Issuance Issued to
_____________________________________________________________________________________
2002-06 Design Vulnerability in BWR 01/18/2002 All holders of operating licenses
Reactor Vessel Level or construction permits for boiling
Instrumentation Backfill water reactors (BWRs).
Modification
2002-05 Foreign Material in Standby 01/17/2002 All holders of licenses for nuclear
Liquid Control Storage Tanks power reactors.
2002-04 Wire Degradation at Breaker 01/10/2002 All holders of operating licenses
Cubicle Door Hinges for nuclear power reactors.
2002-03 Highly Radioactive Particle 01/10/2002 All holders of operating licenses
Control Problems During Spent for nuclear power reactors, Fuel Pool Cleanout holders of licenses for
permanently shutdown facilities
with fuel onsite, and holders of
licenses for non-power reactors.
2002-02 Recent Experience with 01/08/2002 All holders of operating licenses
Plugged Steam Generator for pressurized-water reactors
Tubes (PWRs), except those who have
permanently ceased operations
and have certified that fuel has
been permanently removed from
the reactor.
2002-01 Metalclad Switchgear Failures 01/08/2002 All holders of licenses for nuclear
and Consequent Losses of power reactors.
Offsite Power
2001-19 Improper Maintenance and 12/17/2001 All holders of operating licenses
Reassembly of Automatic Oil for nuclear power reactors, Bubblers except those who have
permanently ceased operations
and have certified that fuel has
been permanently removed from
the reactor vessel.
______________________________________________________________________________________
OL = Operating License
CP = Construction Permit