N00173-24-S-BA01 Amendment 0007 Grants.pdf
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This is Amendment 0007 to the Naval Research Laboratory (NRL) Broad Agency Announcement (BAA) #N00173-24-S-BA01 for Basic and Applied Scientific Research, effective June 24, 2026. The amendment adds Summary Topic 61-24-26 addressing compatibility of Fluorine-Free Foam (F3) with non-aspirating sprinkler nozzles for Navy shipboard applications.
The Navy seeks innovative nozzle technologies and engineering methods to increase the aspirating capabilities of Tyco® Model SB flush-deck nozzles used on flight decks of U.S. Navy surface combatants. Current nozzles operate at 30 psi minimum pressure with a K-factor of 5.1 gpm/psi½, producing approximately 28 gpm flow rate. Proposers are encouraged to develop one of three options: (1) an improved aspirated flush-deck nozzle for new installations (forward fit), (2) a retrofit design kit to modify existing SB nozzles (back-fit), or (3) an aspirating capability in inlet piping to pre-aspirate foam prior to the nozzle. Solutions must maintain the existing application rate of 0.06 gpm/ft² while enhancing aspiration for F3 firefighting agents, demonstrating clear performance improvements at affordable cost with minimal intrusion. Proposals should address shipboard environmental challenges including shock, vibration, corrosion, and plugging resistance while remaining non-intrusive to aircraft operations. White papers should be submitted to code6101@nrl.navy.mil, with one month allowed before requesting receipt confirmation. All other BAA terms and conditions remain unchanged.
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| File | Type | Posted |
|---|---|---|
| N00173-24-S-BA01 Amendment 0004.pdf | ||
| FY24 BAA Announcement FINAL.pdf |
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Amendment 0007 – June 24, 2026
NRL BAA Announcement #N00173-24-S-BA01 Long Range Broad Agency Announcement (BAA) for Basic and Applied Scientific
Research
The purpose of this amendment is to add Summary Topic 61-24-26 to Appendix 1 as follows:
61-24-26 - AFFF ALTERNATIVE PROGRAM COMPATIBILITY OF FLUORINE-FREE
FOAM (F3) WITH NON-ASPIRATING SPRINKLER NOZZLES
INTRODUCTION: NAVSEA 05P5 has an approved Aqueous Film Forming Foam (AFFF) Alternatives program to transition Fluorine-Free Foams (F3) for shipboard use, test them with Navy-ship equipment and systems, identify the needed hardware changes to make them effective, and to establish a military specification for their use. In addition, DASN (RDA) has requested that NAVSEA propose acceleration options to potentially transition ships earlier than originally projected.
One of the major challenges for transitioning F3 products for shipboard use will be the compatibility using F3 products with non-aspirating fixed sprinkler nozzles such as the Tyco® Model SB flush-deck nozzle used on the flight decks of all U.S. Navy surface combatants (see Figure 1).
The SP flush-deck nozzles are installed to provide an application rate of 0.06 gpm/ft2 over the entire flight deck. The Tyco® SB has a K-factor of 5.1 gpm/psi1/2 and operates at a pressure of 30 psi (minimum nozzle pressure) resulting in a flow rate ~ 28 gpm.
Figure-1: Tyco® SB Flush-Deck Nozzle
In support of the new AFFF Alternative program, the Navy Technology Center for Safety and Survivability of the Naval Research Laboratory is investigating innovative nozzle technologies and/or engineering methods that will help to increase the aspirating capabilities of the SB flush-deck nozzles. The desires for consideration include:
(1) Develop an improved aspirated flush-deck nozzle (forward fit option).
(2) Develop an SB flush-deck Aspirating Design Kit that could modify the aspirating capabilities of the existing installed SB flush-deck nozzles (Back-fit option).
(3) Develop an aspirating capability to the inlet nozzle piping that could pre-aspirate the foam solution prior to the SB flush-deck nozzle.
Preferred solutions will enhance aspirating capabilities while maintaining acceptable distribution patterns at an affordable cost with minimal intrusion (for backfit) and be compatible with Fluorine- Free Foam (F3) firefighting agents using the existing SB Flush-deck application rate of 0.06 gpm/ft2 and operates at a pressure of 30 psi (minimum nozzle pressure) resulting in a flow rate ~ 28 gpm.
Proposals must clearly indicate how innovation improves aspiration capabilities and provide value added and performance.
Proposals are encouraged to consider the unique challenges of shipboard service. Solutions should be robust (shock/vibration resistant) and appropriate for the anticipated environmental exposure (corrosion/plugging), and shall not be unusually obtrusive to aircraft operations.
Address White Papers (WP) to code6101@nrl.navy.mil. Allow one month before requesting confirmation of receipt of WP, if confirmation is desired. Substantive contact should not take place prior to evaluation of a WP by NRL. If necessary, NRL will initiate substantive contact.
All other terms and conditions remain unchanged.
mailto:code6101@nrl.navy.mil
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