Information Notice 1987-48, Information Concerning the Use of Anaerobic Adhesive/Sealants

Information Concerning the Use of Anaerobic Adhesive/Sealants

ML031130317
Person / Time
Site:	Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, 05000000, Zimmer, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant, Skagit, Marble Hill
Issue date:	10/09/1987
From:	Rossi C Office of Nuclear Reactor Regulation
To:
References
IN-87-048, NUDOCS 8710050169
Download: ML031130317 (7)

o w SSINS No.: 6835

- :IN 87-48 UNITED STATES

NUCLEAR REGULATORY COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C.- .20555 October 9, 198.7 NRC INFORMATION NOTICE NO.: 87-48: INFORMATION CONCERNINGATHE USE OFi -

ANAEROBIC ADHESIVE/SEALANTS

Addressees

. -

All nuclear power reactor facilities holding an operating license or a con- struction permit.

Purpose

This information notice is provided to-alert recipients to a potentially

significant safety problem pertaining to the use of anaerobic adhesives and

sealants. It is expected that recipients will review the information for

applicability to their facilities and consider actions,, 1f apPropriate;:tb.-

preclude a similar problem. However, suggestions contained in this notice do

not constitute NRC requirements; therefore, no specific action or written

response is required.

Description of Circumstances

On July 1, 1987, Carolina Power and Light Company reported that following a

reactor trip/turbine trip at the BrunswickSteam Electric Plant, Unit 1 (Brunswick), one safety relief valve (SRV) failed to open when manually actu- ated for pressure control. The SRV is part of the automatic depressurization

system (ADS) at that plant. Subsequent testing of other ADS valves on July 3 resulted in a second valve failing to open on manual actuation. During post- failure examination it was determined that Loctite RC 620 was used as a secondary

lock between the stem and the plunger in the solenoid assembly when the valves

were rebuilt by Target Rock Corporation at Wyle Laboratory. This material then

migrated to the clearance around the plunger before setting.

Discussion:

This event is similar to the one described in Information Notice 84-53, "Infor- mation Concerning the Use of Loctite 242 and Other Anaerobic Adhesive/

Sealants." In that event, Loctite 242 threadlocking adhesive/sealant was used

in the assembly of scram pilot solenoid valves. An investigation into the

failure of several scram solenoid valves revealed that maintenance technicians

failed to wipe excess Loctite from the assembly, which resulted in the bonding

of the solenoid core plunger to the core tube.

8710050169

IN 87-48 October 9, 1987 The Brunswick SRVs also failed because the contractor technician did not clean

the excess Loctite RC 620 from the plunger assembly. Because this substance is

anaerobic (cures in the absence of air, e.g., the inerted containment atmo- sphere), the plunger did not become seized until after the valves with excess

Loctite were placed in the inerted atmosphere that exists in the reactor

containment when the reactor is brought to power conditions.

No specific action or written response is required by this information notice.

If you have any questions about this matter, please contact the Regional

Administrator of the appropriate regional office or this office.

Drector

Dsi, Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Ray Scholl, NRR

(301) 492-8213 Attachment: List of Recently Issued NRC Information Notices

114, Attachmnt- IN-87-48 October 9, 1987 LIST OF RECENTLY ISSUED

INFORMATION NOTICES 1987 Information Date of

Notice No. Subject Issuance Issued to

87-47 Transportation of Radio- 10/5/87 All NRC licensees

graphy Devices authorized to manu- facture, distribute

and/or, operate radio- graphic exposure

devices and/or

source changers.

87-46 Undetected Loss of Reactor 9/30/87 All PWR facilities

Coolant holding on OL or CP.

87-45 Recent Safety-Related 9/25/87 All NRC licensees

Violations of NRC authorized to possess

Requirements by Industrial and use sealed sources

Radiography Licensees for industrial radio- graphy.

87-44 Thimble Tube Thinning in 9/16/87 All PWR facilities

Westinghouse Reactors employing a W nuclear

. _T steam supply system

holding an OL or CP.

87-43 Gaps in Neutron-Absorbing 9/8/87 All nuclear power

Material in High-Density reactor facilities

Spent Fuel Storage Racks holding an OL or CP.

87-42 Diesel Generator Fuse 9/4/87 All nuclear power

Contacts reactor facilities

holding an OL or CP.

87-41 Failures of Certain Brown 8/31/87 All nuclear power

Boveri Electric Circuit reactor facilities

Breakers holding an OL or CP.

87-40 Backseating Valves Routinely 8/31/87 All nuclear power

to Prevent Packing Leakage reactor facilities

holding an OL or CP.

87-39 Control of Hot Particle 8/21/87 All nuclear power

Contamination at Nuclear reactor facilities

Power Plants and spent fuel

storage facilities

holding an NRC

license or CP.

OL = Operating License

CP = Construction Permit

Ik -> IN 87-48 V October 9, 1987 The Brunswick SRVs also failed because the contractor technician did not clean

the excess Loctite RC 620 from the plunger assembly. Because this substance is

anaerobic (cures in the absence of air, e.g., the inerted containment atmo- sphere), the plunger did not become seized until after the valves with excess

Loctite were placed in the inerted atmosphere that exists in the reactor

containment when the reactor is brought to power conditions.

No specific action or written response is required by this information notice.

If you have any questions about this matter, please contact the Regional

Administrator of the appropriate regional office or this office.

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Ray Scholl, NRR

(301) 492-8213 Attachment: List of Recently Issued NRC Information Notices

• SEE PREVIOUS CONCURRENCES

• OEAB:DOEA:NRR *OGCB:DOEA:NRR *PPMB:ARM *C/OGCB:DOEA:NRR

RScholl RJKiessel TechEd CHBerlinger

09/14/87 09/14/87 09/18/87 10/1/87 1015/87

0.

IN 87-XX

October xx, 1987 The Brunswick SRVs also failed because the contractor technician did not clean

the excess Loctite RC 620 from the plunger assembly. Because this substance Is

anaerobic (cures in the absence of air e.g., the inerted containment atmo- sphere), the plunger did not become seized until after the valves with excess

Loctite were placed in the inerted atmosphere that exists in the reactor

containment when the reactor is brought to power conditions.

No specific action or written response is required by this information notice.

If you have any questions about this matter, please contact the Regional

Administrator of the appropriate regional office or this office.

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Ray Scholl, NRR

(301) 492-8213 Attachment: List of Recently Issued Information Notices

• SEE PREVIOUS CONCURRENCES

• OEAB:DWEA:NRR *OGCB:DOEA:NRR *PPMB:ARM

C #/

C/OGCB:DOEA:NRR D/DOEA:NRR

RScholl RJKiessel TechEd CHBerlinger CERossi

09/14/87 09/14/87 09/18/87 bQ/ /87 09/ /87

IN 87-XX

August xx, 1987 The Brunswick SRVs also failed because excess Loctite was not cleaned by the

contractor technician from the plunger assembly. In this latter case, Loctite

RC 620 was used. This substance is anaerobic (cures in the absence of air).

Thus, the plunger did not become seized until after the valves with excess

Loctite were placed in the inerted atmosphere which exists In the reactor

containment when the reactor is brought to power conditions.

No specific action or written response is required by this information notice.

If you have any questions about this matter, please contact the Regional

Administrator of the appropriate regional office or this office.

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Ray Scholl, NRR

(301) 492-8213 Attachment: List of Recently Issued Information Notices

OEAB:DOEA:NRR OGCB:DOEA:NRR PPMB:ARI C/OGCB:DOEA:NRR D/DOEA:NRR

RScholl RJKiessel TechEd(' CHBerl inger CERossi

C / F 87 0//Y/87 019/i 7 0C/ /87 Cq/ /87