Chemical Cleaning of Steam Generators at Millstone 2ML031180249 |
Person / Time |
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Site: |
Beaver Valley, Millstone, Calvert Cliffs, Davis Besse, Salem, Oconee, Mcguire, Palisades, Palo Verde, Indian Point, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Watts Bar, Sequoyah, Byron, Arkansas Nuclear, Three Mile Island, Braidwood, Summer, Prairie Island, Surry, North Anna, Turkey Point, Crystal River, Haddam Neck, Ginna, Callaway, Vogtle, Waterford, Farley, Robinson, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, McGuire, 05000000, Washington Public Power Supply System, Trojan, Marble Hill |
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Issue date: |
05/14/1985 |
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From: |
Jordan E NRC/IE |
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To: |
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References |
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FOIA/PA-2005-0210 IN-85-037, NUDOCS 8505130034 |
Download: ML031180249 (3) |
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Similar Documents at Beaver Valley, Millstone, Calvert Cliffs, Davis Besse, Salem, Oconee, Mcguire, Palisades, Palo Verde, Indian Point, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Watts Bar, Sequoyah, Byron, Arkansas Nuclear, Three Mile Island, Braidwood, Summer, Prairie Island, Surry, North Anna, Turkey Point, Crystal River, Haddam Neck, Ginna, Callaway, Vogtle, Waterford, Farley, Robinson, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, McGuire, 05000000, Washington Public Power Supply System, Trojan, Marble Hill |
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Category:NRC Information Notice
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Mclaughlin on NRC, Regarding NRC Information Notice 2006-13: Groundwater Contamination2006-07-13013 July 2006 E-mail from M. Mclaughlin on NRC, Regarding NRC Information Notice 2006-13: Groundwater Contamination 2020-09-03 The following query condition could not be considered due to this wiki's restrictions on query size or depth: <code> [[:Beaver Valley]] OR [[:Millstone]] OR [[:Calvert Cliffs]] OR [[:Davis Besse]] OR [[:Salem]] OR [[:Oconee]] OR [[:Mcguire]] OR [[:Palisades]] OR [[:Palo Verde]] OR [[:Indian Point]] OR [[:Kewaunee]] OR [[:Catawba]] OR [[:Harris]] OR [[:Wolf Creek]] OR [[:Saint Lucie]] OR [[:Point Beach]] OR [[:Watts Bar]] OR [[:Sequoyah]] OR [[:Byron]] OR [[:Arkansas Nuclear]] OR [[:Three Mile Island]] OR [[:Braidwood]] OR [[:Summer]] OR [[:Prairie Island]] OR [[:Surry]] OR [[:North Anna]] OR [[:Turkey Point]] OR [[:Crystal River]] OR [[:Haddam Neck]] OR [[:Ginna]] OR [[:Callaway]] OR [[:Vogtle]] OR [[:Waterford]] OR [[:Farley]] OR [[:Robinson]] OR [[:South Texas]] OR [[:San Onofre]] OR [[:Cook]] OR [[:Comanche Peak]] OR [[:Yankee Rowe]] OR [[:Maine Yankee]] OR [[:Rancho Seco]] OR [[:Zion]] OR [[:Midland]] OR [[:Bellefonte]] OR [[:Fort Calhoun]] OR [[:McGuire]] OR [[:05000000]] OR [[:Washington Public Power Supply System]] OR [[:Trojan]] OR [[:Marble Hill]] </code>.
[Table view]The following query condition could not be considered due to this wiki's restrictions on query size or depth: <code> [[:Beaver Valley]] OR [[:Millstone]] OR [[:Calvert Cliffs]] OR [[:Davis Besse]] OR [[:Salem]] OR [[:Oconee]] OR [[:Mcguire]] OR [[:Palisades]] OR [[:Palo Verde]] OR [[:Indian Point]] OR [[:Kewaunee]] OR [[:Catawba]] OR [[:Harris]] OR [[:Wolf Creek]] OR [[:Saint Lucie]] OR [[:Point Beach]] OR [[:Watts Bar]] OR [[:Sequoyah]] OR [[:Byron]] OR [[:Arkansas Nuclear]] OR [[:Three Mile Island]] OR [[:Braidwood]] OR [[:Summer]] OR [[:Prairie Island]] OR [[:Surry]] OR [[:North Anna]] OR [[:Turkey Point]] OR [[:Crystal River]] OR [[:Haddam Neck]] OR [[:Ginna]] OR [[:Callaway]] OR [[:Vogtle]] OR [[:Waterford]] OR [[:Farley]] OR [[:Robinson]] OR [[:South Texas]] OR [[:San Onofre]] OR [[:Cook]] OR [[:Comanche Peak]] OR [[:Yankee Rowe]] OR [[:Maine Yankee]] OR [[:Rancho Seco]] OR [[:Zion]] OR [[:Midland]] OR [[:Bellefonte]] OR [[:Fort Calhoun]] OR [[:McGuire]] OR [[:05000000]] OR [[:Washington Public Power Supply System]] OR [[:Trojan]] OR [[:Marble Hill]] </code>. |
SSINS No.: 6835 IN 85-37 UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D. C. 20555
'May 14, 1985 IE INFORMATION NOTICE NO. 85-37: CHEMICAL CLEANING OF STEAM GENERATORS AT
MILLSTONE 2
Addressees
All pressurized water reactor (PWR) facilities holding an operating license
(OL) or a construction permit (CP).
Purpose
This information notice is being provided as notification of a potentially
significant problem pertaining to corrosion product buildup in the secondary
side of steam generators which may mask eddy current signals. It is expected
that recipients will review the information for applicability to their facili- ties and consider actions, if appropriate, to preclude a similar problem
occurring at their facilities. However, suggestions contained in this informa- tion notice do not constitute NRC requirements; therefore, no specific action
or written response is required.
Description of Circumstances
Millstone 2 is a two-loop, 2700 megawatt-thermal PWR that was licensed in 1975.
Secondary water treatment has been all-volatile since startup. Northeast
Nuclear Energy Company (NNECo) had plugged 941 tubes in steam generator (SG)-1 and 759 in SG-2 and had sleeved 894 tubes in SG-1 and 1128 in SG-2 prior to the
current outage. The deteriorating condition of the tubes has been attributed
to the buildup of sludge containing, principally, copper and iron. Condenser
and feedwater heater tubes made of a copper-alloy are thought to be the source
of the copper. A sludge pile, the source of corrodants causing denting and
pitting, existed in the secondary side on the tube sheet and around the tubes
to a maximum depth of 13 inches.
Before cleaning the secondary side of the steam generators in early April 1985, NNECo conducted eddy current testing of all 8500 tubes in SG-2 and a statisti- cal sample of tubes in SG-1 and projected the need to sleeve 300 tubes in each
steam generator. Sludge lancing removed about 300 pounds of sludge from each
steam generator. Chemical cleaning of the secondary side removed about 300
pounds more of the sludge. For the basic chemical process, NNECo selected the
Electric Power Research Institute's Steam Generator Owners Group Generic Process.
The concentration of the various chemicals in the solvents was adjusted to yield
the most efficient cleaning of the site-specific materials and configuration.
The procedure was designed to remove the sludge pile with few adverse effects
on the steam generators or internals.
8505130034
I
IN 85-37 May 14, 1985 The cleaning process involves the use of iron' and copper solvents in a specified
number of applications under controlled conditions. The iron solvent uses an
inhibitor to protect the base metal, while the copper solvent has been virtually
noncorrosive to carbon steel and Inconel 600 in tests. Coirosion of the Inconel
tubes has been less than 0.1 mil in sludge cleaning tests. NNECo'had qualified
the specific solvents and processes for use at Millstone 2 before-their use.
Following chemical cleaning, eddy current testing of each of the steam generators
tubes was again performed. NNECo reported that 1077 tubes in the cold leg and
552 tubes in the hot leg of SG-1 will be sleeved. In SG-2, 1074 tubes in the
cold leg and 145 tubes in the hot leg will be sleeved. This represents an increase
of nearly a factor of five in the number of tubes to be sleeved, compared to the
projections made based on eddy current testing prior to cleaning. In addition,
19 tubes (12/7) will be plugged in the two SGs.
This is the first use of this cleaning process at any nuclear plant. The tube
defects found after cleaning are thought to have been present prior to the
cleaning. The copper and iron constituents of the sludge apparently generated
a signal which masked the signal of the smaller defects. Pits of 0.075 inch
diameter and larger can be detected in the presence of copper. After cleaning, smaller diameter defects were identified. Essentially all of these defects
were found in the region of the sludge pile; that is, within a height of 13 inches above the tube sheet.
No specific action or written response is required by this information notice.
If there are -Ay-4`uesti6ns regarding this matte-r, please contact the Regional
Administrator of the appropriate NRC regional office or this office.
a iardctor
Divisit of Emergency Preparedness
and Engineering Response
Office of Inspection and Enforcement
Technical Contact:
Mary S. Wegner, IE
(301) 492-4511 Attachments: List of Recently Issued IE Information Notices
1 NP-3009, Steam Generator Chemical Cleaning Process Development, Electric Power Research Institute, Palo Alto, CA, April 1983.
Attachment 1 IN 85-37 May 14, 1985 LIST OF RECENTLY ISSUED
IE INFORMATION NOTICES
Information Date of
Notice No. Subject Issue Issued to
84-55 Seal Table Leaks At PWRs 5/14/85 All power reactor
Sup. 1 facilities holding
an OL or CP
85-20 Motor-Operated Valve Failures 5/14/85 All power reactor
Sup. 1 Due To Hammering Effect facilities holding
an OL or CP
85-36 Malfunction Of A Dry-Storage, 5/9/85 All licensees
Panoramic, Gamma Exposure possessing gamma
Irradiator irradiators
84-52 Inadequate Material 5/8/85 All power reactor
Sup. 1 Procurement Controls On facilities holding
The Part Of Licensees And an OL or CP
Vendors
85-35 Failure Of Air Check Valves 4/30/85 All power reactor
To Seat facilities holding
t' . I I i * I I
anOL or CP
85-34 Heat Tracing Contributes To 4/30/85 All power reactor
Corrosion Failure Of Stainless facilities holding
Steel Piping an OL or CP
84-84 Deficiencies In Ferro- 4/24/85 All power reactor
Rev. 1 Resonant Transformers facilities holding
an OL or CP
85-33 Undersized Nozzle-To-Shell 4/22/85 All power reactor
Welded Joints In Tanks And facilities holding
Heat Exchangers Constructed an OL or CP
Under The Rules Of The ASME
Boiler And Pressure Vessel
Code
85-32 Recent Engine Failures Of 4/22/85 All power reactor
Emergency Diesel Generators facilities holding
an OL or CP
OL = Operating License
CP = Construction Permit
|
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list | - Information Notice 1985-01, Continuous Supervision of Irradiators (10 January 1985)
- Information Notice 1985-02, Improper Installation and Testing of Differential Pressure Transmitters (11 January 1985)
- Information Notice 1985-03, Separation of Primary Reactor Coolant Pump Shaft and Impeller (15 January 1985)
- Information Notice 1985-04, Inadequate Management of Security Response Drills (17 January 1985)
- Information Notice 1985-05, Pipe Whip Restraints (23 January 1985)
- Information Notice 1985-06, Contamination of Breathing Air Systems (23 January 1985)
- Information Notice 1985-07, Contaminated Radiography Source Shipments (29 January 1985)
- Information Notice 1985-08, Industry Experience on Certain Materials Used in Safety-Related Equipment (30 January 1985)
- Information Notice 1985-09, Isolation Transfer Switches and Post-Fire Shutdown Capability (31 January 1985, Topic: Safe Shutdown)
- Information Notice 1985-10, Posttensioned Containment Tendon Anchor Head Failure (6 February 1985)
- Information Notice 1985-11, Licensee Programs for Inspection of Electrical Raceway and Cable Installations (11 February 1985)
- Information Notice 1985-12, Recent Fuel Handling Events (11 February 1985)
- Information Notice 1985-13, Consequences of Using Soluble Dams (21 February 1985, Topic: Hydrostatic)
- Information Notice 1985-14, Failure of a Heavy Control Rod (B4C) Drive Assembly to Insert on a Trip Signal (22 February 1985)
- Information Notice 1985-15, Nonconforming Structural Steel for Safety-Related Use (22 February 1985)
- Information Notice 1985-16, Time/Current Trip Curve Discrepancy of ITE/Siemens-Allis Molded Case Circuit Breaker (27 February 1985)
- Information Notice 1985-17, Possible Sticking of Asco Solenoid Valves (1 March 1985)
- Information Notice 1985-18, Failures of Undervoltage Output Circuit Boards in the Westinghouse-Designed Sold State Protection System (7 March 1985)
- Information Notice 1985-19, Alleged Falsification of Certifications and Alteration of Markings on Piping, Valves, and Fittings (11 March 1985)
- Information Notice 1985-20, Motor-Operated Valve Failures Due to Hampering Effect (12 March 1985)
- Information Notice 1985-21, Main Steam Isolation Valve Closure Logic (18 March 1985)
- Information Notice 1985-22, Failure of Limitorque Motor-Operated Valves Resulting from Incorrect Installation of Pinion Gear (21 March 1985)
- Information Notice 1985-23, Inadequate Surveillance and Postmaintenance and Postmodification System Testing (22 March 1985)
- Information Notice 1985-24, Failures of Protective Coatings in Pipes and Heat Exchangers (26 March 1985, Topic: Ultimate heat sink, Coatings)
- Information Notice 1985-25, Consideration of Thermal Conditions in the Design and Installation of Supports for Diesel Generator Exhaust Silencers (2 April 1985, Topic: Coatings)
- Information Notice 1985-26, Vacuum Relief System for Boiling Water Reactor Mark I and Mark II Containments (2 April 1985, Topic: Coatings)
- Information Notice 1985-27, Notifications to the NRC Operations Center and Reporting Events in Licensee Event Reports (3 April 1985, Topic: Coatings)
- Information Notice 1985-28, Partial Loss of AC Power and Diesel Generator Degradation (9 April 1985, Topic: Coatings)
- Information Notice 1985-30, Microbiologically Induced Corrosion of Containment Service Water System (19 April 1985, Topic: Hydrostatic, Coatings, Biofouling)
- Information Notice 1985-31, Buildup of Enriched Uranium in Ventilation Ducts and Associated Effluent Treatment Systems (19 April 1985, Topic: Coatings)
- Information Notice 1985-32, Recent Engine Failures of Emergency Diesel Generators (22 April 1985, Topic: Coatings)
- Information Notice 1985-33, Undersized Nozzle-To-Shell Welded Joints in Tanks and Heat Exchangers Constructed Under the Rules of the ASME Boiler and Pressure Vessel Code (22 April 1985)
- Information Notice 1985-34, Heat Tracing Contributes to Corrosion Failure of Stainless Steel Piping (30 April 1985, Topic: Hydrostatic)
- Information Notice 1985-35, Failure of Air Check Valves to Seat (30 April 1985)
- Information Notice 1985-35, Failure of Air Check Valves To Seat (30 April 1985)
- Information Notice 1985-37, Chemical Cleaning of Steam Generators at Millstone 2 (14 May 1985)
- Information Notice 1985-38, Loose Parts Obstruct Control Rod Drive Mechanism (21 May 1985)
- Information Notice 1985-39, Auditability of Electrical Equipment Qualification Records at Licensees' Facilities (22 May 1985)
- Information Notice 1985-40, Deficiencies in Equipment Qualification Testing and Certification Process (22 May 1985)
- Information Notice 1985-43, Radiography Events at Power Reactors (30 May 1985, Topic: High Radiation Area, Scaffolding)
- Information Notice 1985-44, Emergency Communication System Monthly Test (30 May 1985, Topic: Health Physics Network)
- Information Notice 1985-46, Clarification of Several Aspects of Removable Radioactive Surface Contamination Limits for Transport Packages (10 June 1985)
- Information Notice 1985-47, Potential Effect of Line-Induced Vibration on Certain Target Rock Solenoid-Operated Valves (18 June 1985)
- Information Notice 1985-48, Respirator Users Notice: Defective Self Contained Breathing Apparatus Air Cylinders (19 June 1985, Topic: Hydrostatic)
- Information Notice 1985-49, Relay Calibration Problem (1 July 1985)
- Information Notice 1985-50, Complete Loss of Main and Auxiliary Feedwater at a PWR Designed by Babcock & Wilcox (8 July 1985)
- Information Notice 1985-51, Inadvertent Loss or Improper Actuation of Safety-Related Equipment (10 July 1985)
- Information Notice 1985-52, Errors in Dose Assessment Computer Codes and Reporting Requirements Under 10 CFR Part 21 (10 July 1985)
- Information Notice 1985-53, Performance of NRC-Licensed Individuals While on Duty (12 July 1985)
- Information Notice 1985-54, Teletherapy Unit Malfunction (15 July 1985)
... further results |
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